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Airtightness Systems

“Where Fabric First comes as Second Nature”

List of Contents

01 Introduction

Ostman Thermal’s primary objective in the promotion of Synergie products is to guarantee top quality products and technologically advanced solutions for the building envelope.

Under the Synergie brand, we offer a wide variety of top quality windtightness membranes, airtight vapour control layer membranes, airtight tapes, sealants and other products for achieving optimum raintightness, windtightness and airtightness results. All of these products are manufactured in Germany to the highest standards, in line with European harmonised standards for energy saving and carry CE Markings, where required, under the Construction Products Regulation. All products we stock fully comply with the Irish Building Regulations.

02 Compliance under the Construction Products Regulation (CPR)

The Technical Guidance Document Part D (TGD D) provides guidance in relation to Part D of the Second Schedule to the Building Regulations. It relates to “materials and workmanship” as inserted by the Building Regulations Part D Amendment 2013 (S.I. No. 224 of 2013). To ensure the quality of materials used in construction, TGD Part D requires compliance with the EU Construction Products Regulation (Regulation (EU) No. 305/2011).

The EU Construction Products Regulation lays down harmonised conditions for the marketing of construction products and is directly applicable by Irish Law. From July 1st 2013 CE Markings have been mandatory for all construction products placed on the market in the European Economic area which are covered by a Harmonised European Standard (hENs). Although other forms of certification (IAB, BBA Certs etc.) may be available for a given product or material, if a Harmonised Standard is in place then the product/material must be CE Marked and have an associated Declaration of Performance (DoP). This DoP is independently overseen, to ensure compliance with the relevant EN, by an EU Certified Notified Body, such as (in our case) Kiwa GmbH, Germany.

The Construction Products Regulation ensures that reliance performance-related data is made available. This is achieved by means of a Declaration of Performance in relation to construction products being placed on the European market. The primary purpose of the CPR is to remove technical barriers to ensure the free movement of construction products across Member States within the European Union.

To ensure compliance with the CPR and TGD Part D, clients, specifiers, designers, builders and contractors should, when drawing up specifications, refer to the harmonised technical specifications and specifically to the requirements of individual characteristics when necessary. When selecting products for use in construction works, the manufacturer’s Declaration of Performance should be reviewed to ensure that the “construction products are suitable for their intended use”. Project teams should review Standard Recommendations for guidance on appropriate minimum performance levels for specific intended uses of the product.

Building companies of all sizes, all across the EU, use our products to help them achieve national building code standards and to build energy efficient and passive buildings to the highest of standards.

03 Consequences of Gaps in the Building Fabric

The requirement for more efficient use of energy in the operation and use of buildings has led to increased levels of thermal insulation and airtightness in both new and refurbished buildings.

Gaps, in the building fabric, which open up as a result of an interruption in a roof package and/or an unsealed wall can give rise to the following problems;

  • Ingress of heat in the summer, making the structure uncomfortable.
  • Loss of heat in the winter due to natural convection of warm air and the ingress of cold wind/draughts from the outside
  • Condensation in the outer layers in winter, where warm air coming from inside the building cools down and may condense
  • Condensation in the inner layers in summer, where humid air from outside cools down and may condense
  • Reduction in internal room comfort due to draughts
  • Exposure to noise

To minimise or eliminate these problems, if you specify and install the Synergie Airtightness system, taking great care to the detailing of the products, you will get tremendous benefits.

04 Synergie Airtightness System Benefits

By installing the Synergie Airtightness system into your new home, you will get all of the following benefits;

  • Removes Draughts
  • Cuts Heating Bills
  • Prevents condensation
  • Protects and improves the performance of your thermal insulation
  • Protects from damage caused by mould – Health Benefits
  • Ventilation system works more efficiently
  • Lower CO2 emissions
  • Helps lock out odours, noise and unpleasant summer heat
  • Safe and quick to install
  • Environmentally friendly
  • No harmful toxins or solvents
  • Helps attain good Building Energy Rating (BER)
  • Helps increase the value of your property

04 Synergie Airtightness System Benefits

By installing the Synergie Airtightness system into your new home, you will get all of the following benefits;

  • Removes Draughts
  • Cuts Heating Bills
  • Prevents condensation
  • Protects and improves the performance of your thermal insulation
  • Protects from damage caused by mould – Health Benefits
  • Ventilation system works more efficiently
  • Lower CO2 emissions
  • Helps lock out odours, noise and unpleasant summer heat
  • Safe and quick to install
  • Environmentally friendly
  • No harmful toxins or solvents
  • Helps attain good Building Energy Rating (BER)
  • Helps increase the value of your property

Remove Draughts

Research shows that up to half of all heat loss in buildings can be due to uncontrolled ventilation and air leakage through the external fabric of the building envelope. Despite increased insulation values due to improved building regulations, warm air can leak out and cold air can still enter through joints in the building fabric in the form of draughts. The main air leakage points that attention should be paid to are:

  • Joints between walls, roofs and ceilings
  • Joints between foundation and wood structure in timberframe
  • Overlaps and interruption of membranes
  • Joints between walls and window/door frames
  • Penetrations in the external envelope – pipes, cables etc.
  • Unplastered blockwork, such as between intermediate timber floor joists

A well installed airtightness system is the control of this air leakage.

05 How to guarantee good airtightness and windtightness

“Weil Jedes Detail Zahlt”

“Every Detail Counts”

Good airtightness on a roof or wall can be achieved by ensuring a “Synergie” between design and execution and by trying to ensure that there are two airtight layers present:

  • Internal Airtight Layer (for example a Vapour control layer)
  • External windtight layer (for example a highly breathable membrane)

The weak points are not large surfaces but all the interruptions and openings in the roof or wall. The rule of thumb is that if you were to go around the graphic design of the house with a pencil, every time you lift the pencil is a potential air leakage point, such as conduits, waste and soil pipes and ducts, pipes for solar systems, window and door frames. The key is to totally seal these air leakage points:

  • Vapour control layers, barriers and breathable membranes should be sealed at their joints using Multi Tape
  • Large pipes, conduits and roof windows should be sealed on the outside using butyl tapes, such as Coll Flexi, to the breathable membranes and to the vapour control layer on the inside using Multi Tape
  • The internal walls of timberframe houses should be sealed at their joints with acrylic adhesive tape Multi Tape, butyl tape or sealants in cartridge containers
  • Door and window frames should be sealed with elastic expanding foam, and or compression tapes and sealing tape around their perimeters where they meet the wall or subframe. You can choose Synergie Full Adhesive Window Tape, with full waterproof adhesive, where the tape is to plastered on smooth blockwork or choose FI-D Window tape where the blockwork is rough and you need to adhere the tape to the substrate with acrylic adhesive, Synergie Acrylic Adhesive or in damp conditions our Synergie MSP MS Polymer Adhesive and Sealant. Both tapes, once fully adhered, can be plastered over

06 Airtightness Test

Under building regulations in Ireland and the UK the emphasis is set on achieving reasonable standards of airtightness, and it is compulsory to subject samples of newly built houses to an airtightness test. The current standard regarding the airtightness of a building is EN ISO 9972:2015. This standard does not specify a limit regarding airtightness but simply describes the measurement of airtightness. This standard distinguishes between two different tests – the preliminary test and the final test. The preliminary test’s purpose is quality control of the installed airtight layer and should be carried out immediately after the airtight system has been installed. This will help pinpoint if any improvements are required or if unintended damage has occurred to the airtight layer. The final test has to be carried out when the house is finished and ready to be moved in to. The method described in the standard is the Blower Door test in which a fan pressurizes and depressurizes the building envelope. The fan (mounted into the frame of an exterior window or door) is used to take a series of measurements which result in a regression curve which describes the air loss of the building envelope under varying pressure differentials.

06 Airtightness Test

Under building regulations in Ireland and the UK the emphasis is set on achieving reasonable standards of airtightness, and it is compulsory to subject samples of newly built houses to an airtightness test. The current standard regarding the airtightness of a building is EN ISO 9972:2015. This standard does not specify a limit regarding airtightness but simply describes the measurement of airtightness. This standard distinguishes between two different tests – the preliminary test and the final test. The preliminary test’s purpose is quality control of the installed airtight layer and should be carried out immediately after the airtight system has been installed. This will help pinpoint if any improvements are required or if unintended damage has occurred to the airtight layer. The final test has to be carried out when the house is finished and ready to be moved in to. The method described in the standard is the Blower Door test in which a fan pressurizes and depressurizes the building envelope. The fan (mounted into the frame of an exterior window or door) is used to take a series of measurements which result in a regression curve which describes the air loss of the building envelope under varying pressure differentials.

07 Products

At the Troisdorf production facility in Germany, our supply partner,  Synwer GmbH manufacture numerous Breathable Roof Sarking membranes, Breathable House Wrap membranes, Airtight Vapour Control Layer membranes. airtight plasterable window tapes and other airtight tapes and accessories. All manufactured products, are tested for compliance to EN13859/EN13984 within their own in-house testing laboratory which has equipment for testing; QUV, water tightness, airtightness, tensile testing machine, balance and a Sd (vapour permeability) testing device. These tests are carried out in accordance with specific laid down EU standards. The requirements for testing on the final product are fixed in the DoP and the internal file for each product, which are intensely reviewed by the EU Certified Notified Body, Kiwa GmbH, during their annual audit.

Kiwa GmbH issue the Conformity Certificates which attest that “all provisions concerning the attestation of factory production control are applied”, in accordance to the Harmonised EU Norms;

  • EN13859 – 1:2014 – which covers Breathable Roof Sarking Membranes
  • EN13859 – 2:2014 – which covers Breathable House Wrap Membranes
  • EN 13984:2013  – which covers AVCLs (Airtight Vapour Control Layers)

To produce each category of product, Synwer GmbH sources the best quality, most durable, European manufactured, raw materials, including PP (Polypropylene) Spunbond non-woven fleeces of different thicknesses and weights, PP foils, PE (polyethylene) foils, PUR (polyurethane) foils, PA (polyamid) foils, PET (polyester spunbond) foils and Coex foils. Each foil has its own Sd-value. The Sd-value of an external roofing membrane, timber-frame house-wrap or airtightness vapour control layer, is a measurement of the “Resistance to the migration of water vapour” of that material.

Membranes that are generally exposed to the weather during construction (roofing membranes typically) will have very low Sd-values, usually Sd 0.02m. This means that the material used, although completely water tight (meeting W1 water-tightness) is very “vapour open”, or “breathable”, allowing very quick migration of any water vapour (that may build up on the underside of the material, due to condensation mainly), from the inside to the outside of the sarking membrane. This is known as the “open diffusion” properties of that material. On the other hand, as you move closer to Sd 100m, the material in question becomes more “vapour tight”, significantly slowing down the rate/speed of migration of the water vapour from the inside to the outside.

Although they manufacture many different membranes at Synwer GmbH, the specific products, that Ostman Thermal Ltd. stock and distribute are as follows;

(i) Windtight Exterior Products

 

  • Superior Line” SL155 Breathable Monolithic Roof Sarking Membrane, is the next generation of Superior Performance vapour permeable underlays. Head SL155 is a three-ply diffusion-open sarking membrane with the latest monolithic technology. The latest state of art is a three-layer combination of
  • an upper protective layer of water-repellant, UV-stabilised, anti-slip, polypropylene PP spunbond fleece (with outdoor exposure up to 6 months),
  • Central membrane; an inner functional film which is a UV10 Bikom PUR film (unique to Synwer GmbH) that is monolithic, diffusion-open, driving rain-proof as well as UV and heat resistant.
  • and a lower protective layer of PP, high-quality, UV resistant.
  • SL155 is 100% completely airtight, is 155g/m2 in weight, and has an Sd-value of Sd 0.07m.
  • Monolithic films are the newest, most modern functional foils, that do not contain microporous pores for the transfer of water vapour. Instead, the monolithic, pore-free foils actively transport moisture to the outside. Only a minimal partial vapour pressure gradient is required for this transport of moisture (water vapour). The more it is, the faster the diffusion resistance of the foil decreases, ie. the more diffusion-open the foil becomes. The monolithic foil ensures special protection against driving rain because there are no pores. However, the PUR (polyurethane) foil still has moisture-variable properties to allow for open diffusion to occur, but still ensure 100% airtightness, with all of these characteristics in full compliance with CE EN 13859-1/2. The Monolithic PUR film is 15 times more durable than the standard microporous membranes.

 

  • Eurostandard Line” Head Wall 120, which is a three-layer, highly diffusion open sarking membrane that meets all the requirements of the various applicable European Standards for tearing forces and rainproof sub roofs and wall façade applications. The three-layer, diffusion open, wind seal, sarking membrane is a combination of
  • an upper protective layer of water-repellant, UV-stabilised PP (polypropylene) fleece,
  • an inner Microporous functional film of PP (polypropylene foil),
  • and a lower protective layer of PP (polypropylene).
  • Head Wall 120 is completely 100% airtight, is 120g/m2 in weight, and it’s Sd-value is Sd 0.02m.
  • The inner functional foil is made of polypropylene as a closed foil. The material of this foil is diffusion-tight in its original state. In order to create a diffusion-open/breathable sarking membrane, calcium carbonate is added and stretched in the production of the PP film to form micro pores. These three-ply films are then subjected to the “thermobonded” process, with high temperature more than 140 deg. C with high pressure, in a technologically very complex and specially established production process to finish with a rain-proof, wind-proof, airtight, vapour diffusion-open sarking membrane, in compliance with CE EN 13859-2.
  • The attached FIW Munich Certificate is a test of the breather membranes that Synwer GmbH produce with microporous polypropylene foils

(ii) Two Airtight Vapour Control Layers

 

The airtight layer is located on the inside of the “building envelope”. At Ostman Thermal, we currently stock two Airtight Vapour Control Layers (AVCLs);

(i)  Synergie Sd Variable, (Intelligent/Active) Airtight Vapour Control Layer
(ii) Synergie Sd Fixed, Sd2, Airtight Vapour Control Layer

 

(i) “Synergie Sd Variable Sd 0.2m – Sd 20m Airtight Vapour Control Layer (AVCL)’’ is a two-layer, moisture-variable performance, fully 100% airtight, vapour control layer. Variable Sd AVCLs can change their vapour permeable characteristics based on the vapour pressure gradient, or Relative Humidity (RH) surrounding/in close proximity to the membrane. The two-layer Sd Variable membrane has an upper functional foil film in PA (polyamid). This film is a special kind of plastic that reacts to the humidity in the air and the temperature differentials between outside and inside. The PA film remains completely airtight, while the micropores of the film can increase (open) or decrease (close) their size to allow the passage of water vapour molecules, which are many, many times smaller than air molecules. Vapour can pass through, but air cannot pass. The lower support layer is PET (polyester spunbond). In the summertime, there is relatively higher RH, and the functional PA foil is “open” vapour permeable, operating at the lower spectrum of Sd0.2, and is very breathable, while in the winter, there is lower RH and the functional PA foil becomes more vapour “tight”, as it operates closer to the upper limit of Sd20. In the long run, over a few years, this ability to act as a barrier in winter and a breathable membrane in summer, helps to protect the building from structural damage caused by excessive moisture trapped in the building fabric.

The Synergie Sd Variable membrane is ideally suited to flat roof make-ups which are not adequately ventilated or diffusion “vapour tight” towards the outside. The Synergie Sd Variable membrane is also suitable in new build where excessive moisture accumulation has occurred during the initial construction phase of the building process, such as Timber-frame, where timber elements and/or thermal insulation has suffered an unplanned wetting.

 

(ii) Synergie Sd Fixed AVCL, Sd2/100, is a two-layer, translucent airtight vapour control layer with an Sd value of 2m and is 100gramme/m2 in weight. It is manufactured as a combination of an upper protective layer of water-repellent, UV-stabilised, completely 100% airtight, polypropylene spunbound fleece and on the underside, the functional film, slightly diffusible (allowing slow vapour diffusion) polypropylene film. With its optimum fixed Sd value, Sd2m, this fully 100% airtight VCL is perfectly suitable for the underside of ceilings in most pitched roof applications, where breathable roofing membranes (with typical Sd values of Sd 0.02) are incorporated, as they are diffusion open to the outside.

The decision on which airtight vapour control layer to choose in a warm roof (lived-in attic space) or cold roof detail (with the AVCL fitted, say, for instance, at first floor ceiling level) is often made on the basis of a simple principle or “rule of thumb”, which states that a roof or wall construction should, in relation to water vapour migration, be “tighter on the inside than on the outside”. But just how much tighter should the ACVL be? Another simple “rule of thumb” states that “10 times more diffusion-proof on the inside than on the outside is optimal”.  If the roofing membrane on site is “vapour open” and has an Sd-value of Sd0.2m then the Synergie Sd2.0m is 100 times higher Sd than the Sd-value of the external roofing membrane. This is perfect, as any vapour molecules that can pass slowly through the Sd2.0 membrane will easily be dealt with by the Sd0.02 vapour open properties of the pitched roof sarking membrane, ensuring that no build-up of condensation on the underside of the roofing membrane will occur. Both membranes are vapour permeable and allow for natural open diffusion to occur.

To summarise, the Sd2/100 AVCL is a 100% completely airtight membrane with a “Resistance to Penetration of Air” of less than 0.002m3/(m2h/50Pa) and as outlined above, performs as a Vapour Control Layer with a declared Sd-value, or “water vapour transmission rate” of Sd2.0m, as per the attached Technical Data Sheet (TDS), dated 28th July 2020, and the Declaration of Performance (DoP), dated 15th July 2020.

The Synergie Sd Variable and Sd2/100 AVCLs are fully EU CPR compliant, are CE Marked and are airtight vapour control layer construction products, “fit for their intended use”, and “manufactured in strict accordance with the applicable EU harmonised technical specification DIN EN 13984: 2013-05 Plastic and rubber vapour control layers – Definitions and characteristics.”

All membranes produced by Synwer GmbH are manufactured under the strict supervision of the EU notified body, Kiwa GmbH, who carry out the annual audits and issue the Conformity Certificates each year. Synwer GmbH also use the testing services of Technical University Berlin & FIW Munich.

(iii) Airtight Tapes and Accessories

The following points are very important factors that contribute to the successful performance of an adhesive tape;

Temperature

the adhesives on the tape form an immediate bond but develop their maximum strength over a period of 24 hours. The minimum temperature required for the adhesive to form an immediate minimum adhesive bond is -10 degrees C. Therefore, the lower the temperature the slower the immediate bonding reaction. Once the tape has been applied the process will develop its maximum adhesive bond as the temperature rises.

Pressing on the adhesive Tape

Acrylic based adhesive tapes are pressure activated, so sufficient pressure is required to ensure a long lasting bond. An essential factor for the perfect adhesion to the surface is to press on the adhesive tape after it has been laid; the more you press on the tape the more the acrylic glue penetrates the fibres of the membrane or the pores of the surfaces to be sealed, increasing its immediate adhesive strength and its strength over time. For best results, using the Pressing Roller for laying the tapes, is recommended.

Cleaning the Surface

it is essential that the surface to be adhered to is clean and dry, since any residues of water, humidity, frost, grease, dust or dirt will prevent the adhesive tape from adhering to the surface. Damp and/or dusty substrates can play havoc during the installation phase. After the substrate has been thoroughly cleaned (brushed down) the dry substrate can be stabilized using Synergie Spray Primer, allowed to dry, so that the adhesive tape can be successfully applied.

Temperature

the adhesives on the tape form an immediate bond but develop their maximum strength over a period of 24 hours. The minimum temperature required for the adhesive to form an immediate minimum adhesive bond is -10 degrees C. Therefore, the lower the temperature the slower the immediate bonding reaction. Once the tape has been applied the process will develop its maximum adhesive bond as the temperature rises.

Pressing on the adhesive Tape

Acrylic based adhesive tapes are pressure activated, so sufficient pressure is required to ensure a long lasting bond. An essential factor for the perfect adhesion to the surface is to press on the adhesive tape after it has been laid; the more you press on the tape the more the acrylic glue penetrates the fibres of the membrane or the pores of the surfaces to be sealed, increasing its immediate adhesive strength and its strength over time. For best results, using the Pressing Roller for laying the tapes, is recommended.

Cleaning the Surface

it is essential that the surface to be adhered to is clean and dry, since any residues of water, humidity, frost, grease, dust or dirt will prevent the adhesive tape from adhering to the surface. Damp and/or dusty substrates can play havoc during the installation phase. After the substrate has been thoroughly cleaned (brushed down) the dry substrate can be stabilized using Synergie Spray Primer, allowed to dry, so that the adhesive tape can be successfully applied.

Synergie Multi Tape 60mm & 100mm

Multi Tape, available in 60mm and 100mm widths, is a Universal acrylic adhesive tape with mesh scrim reinforcement for both inside and outside use. It is slightly stretchable, making it perfect for use around small pipe and wiring penetrations. This ability to stretch is very useful where there is settlement in timber elements. It can be used for permanent sealing of Synergie breathable membranes, Synergie vapour control layers and barriers at the overlaps or directly onto the lateral surfaces of roof windows, vents etc. as well as sealing the joints in OSB boards/plywood. It is suitable for connections to metal surfaces, such as RSJs. timber and concrete (prime the concrete with Synergie Spray Primer, if necessary).

The innovative Synergie Multi Tape Easy Rip 60mm is a multifunctional, universal acrylic adhesive tape that is manually hand tearable for ease of application.

Synergie Multi Tape 60mm & 100mm

Multi Tape, available in 60mm and 100mm widths, is a Universal acrylic adhesive tape with mesh scrim reinforcement for both inside and outside use. It is slightly stretchable, making it perfect for use around small pipe and wiring penetrations. This ability to stretch is very useful where there is settlement in timber elements. It can be used for permanent sealing of Synergie breathable membranes, Synergie vapour control layers and barriers at the overlaps or directly onto the lateral surfaces of roof windows, vents etc. as well as sealing the joints in OSB boards/plywood. It is suitable for connections to metal surfaces, such as RSJs. timber and concrete (prime the concrete with Synergie Spray Primer, if necessary).

The innovative Synergie Multi Tape Easy Rip 60mm is a multifunctional, universal acrylic adhesive tape that is manually hand tearable for ease of application.

Synergie Fassaden Tape FT 60mm

Professional, universal, UV-stabilised, polyethylene 60mm wide adhesive tape, with polyester reinforcing mesh with highly adhesive acrylic glue. It is black in colour. It is ideal for concealing overlap joints on Synergie Façade membrane installed behind open jointed ventilated facades, such as cedar cladding.

Synergie Membrane Tape 60mm

Synergie Membrane Tape 60mm is an adhesive tape on PE treated paper coated highly adhesive acrylic glue for internal use. The tape has been specifically produced for bonding Synergie vapour control layers with the purpose of providing a seal against air, wind, vapour and noise on interuptions in roofs and/or walls. It can also be used for internal sealing of OSB boards in timberframe construction. On surfaces to be bonded, make sure they are free from dust and moisture. Cut the tape to the desired length, remove the protective liner and lay the adhesive tape onto the overlap of the membrane, then press firmly along the length of the tape with the Pressing Roller so that the adhesive bonds properly.

Synergie High-Tack Grey Fleece Tape 60mm, 90mm and 130mm

Synergie High-Tack Grey Fleece Tape, available in 60mm, 90mm and 130mm widths with split-backing pvc liners, are adhesive tapes in nonwoven fabric of polypropylene with highly performing adhesive acrylic glue. It is used to repair unintended tears in breathable membranes. It is also used for airtight sealing of the building envelope which need a following plastering, such as the adherence of the vapour control layer to dry, clean wall structures, that have been primed where required.

Synergie Coll Flexi CF

Synergie Coll Flexi is available in 100mm width and is a highly flexible butyl adhesive tape. It is totally hand malleable and permanently elastic, can be pressed down by hand then rolled in flat with the Pressing Roller. Once properly adhered it has very strong adhesion properties and mostly works without the need to prime the surface. It is ideal for use as a permanent seal both inside and outside at all penetrations in the building structure.

Synergie Bold SB

Synergie Bold SB is a double-sided reinforced adhesive bead for indoor use. It is permanently elastic and has super strong bonding properties. It is primarily used to bond vapour control layers to any type of building surface, masonry blockwork, wood or metal, to guarantee airtightness at the junction of membranes and structures.

Synergie Adhesive Paste 310ml

Synergie Acrylic Adhesive paste, in 310ml cartridges, and light blue in colour, is designed for gluing and sealing the overlaps of vapour control layers or breathable membranes and for gluing them to other surfaces, such as blockwork, plaster and wood. Can be used around small gaps along timber floor joists in a continuous bead. It is also suitable for fixing FI-D Window tapes for door and window frames on adjacent blockwork. The surfaces on which the Adhesive will be applied must be clean, dry, stable and free from dust or grease. Using a mastic gun, apply a continuous bead of between 6-8mm in diameter to the substrate. If the surface is particularly rough, increase the bead size as appropriate. Then gently press down on the vapour control layer or FI-D window tape, but do not press the adhesive completely flat. The drying time will depend on the porosity of the surface, the temperature and the amount of adhesive applied.

(iv) Synergie Window Tapes

Synergie Full Adhesive Window Tape

Synergie Full Adhesive Window Tape is a white, multi-layered (PP. PP foil) thermobonded tape with a high performance, moisture resistant, acrylic coating. We stock the product in five widths; 60mm, 75mm, 100mm, 150mm and 200mm. The tape has an Sd value, Sd 20, which protects against condensation. The tape backing has full adhesive and comes with split finger lift liners. The tape is ideal for laying at the joints between frames and walls to guarantee airtightness (internal) and wind-tightness (external). The surface of the tape has been designed to be plastered over, where required. Application; Identify the surfaces to be sealed, making sure all surfaces are dry and free from dust and grease. We recommend the use of Synergie Spray Primer on porous surfaces. After cutting the tape to the desired length, remove the 12mm protective liner from the acrylic adhesive tape, apply the adhesive surface to the border of the window/door frame and press firmly with the Pressing Roller along the entire surface of the adhesive tape so that the glue bonds properly. Then remove the other split liners and place the adhesive side on the surface of the wall and press firmly with the roller along the entire surface of the adhesive tape so that the glue bonds properly.  Be extra careful to ensure you get a full bond to the substrate along the length and across the width of the adhesive tape, and that the tape lies fully flat along the substrate. If the substrate is uneven, particularly rough blockwork, then we recommend that any gaps that exist between the tape and the substrate are filled with a bead of Synergie adhesive paste, gently pressed down, to fill these gaps. Once the tape is fully bonded to the substrate it can be plastered over.

Synergie FI-D Window Tape

FI-D = “Foilenband, Innen, Dehnbar” (Window tape, Internal, Slightly Stretchable)

Synergie FI-D window tape is the most cost competitive fleece tape in the market. It is a universal tape for indoor use. With an Sd value of Sd 40 it helps control vapour diffusion. It adapts to all types of surfaces and can be plastered over. The tape has a single 25mm adhesive strip for attaching to the edge of the window/door frame, which will achieve a very strong bond after it has been rolled in using the Pressing Roller. The other side of the tape is plain for applying the Synergie Acrylic Adhesive or Synergie MSP MS Polymer Sealant Adhesive paste. We recommend that a 6-8mm bead of adhesive is applied to the substrate before gently laying the tape on top of the bead of adhesive. The corners are then sealed with grey fleece tape 60mm, or a strong bead of Synergie Acrylic Adhesive or Synergie MSP MS Polymer Sealant Adhesive paste, to guarantee an airtight seal. The FI-D tape can be used for masonry and wooden surfaces, such as solid wood, laminate, OSB, plywood etc. The tape is stocked in three widths, 100mm, 150mm and 200mm and comes in rolls 30 metres in length.

08 Product Data Sheets and Declaration of Performance sheets

Synergie Superior Line

Synergie Superior Line

Synergie Head SL 155

Synergie Head SL 155

Synergie Façade Membrane

Synergie Façade Membrane

Synergie Head Wall 120

Synergie Head Wall 120

Synergie Vapour Control Layers-Barriers

Synergie Vapour Control Layers-Barriers

Synergie Syn Sd Variable 100

Synergie Syn Sd Variable 100

Synergie Syn Sd 2- 100

Synergie Syn Sd 2- 100

Synergie DUO Variable Easy

Synergie DUO Variable Easy

Synergie FI-D

Synergie FI-D

Synergie Multi Rip

Synergie Multi Rip

Synergie Facades Tape FT

Synergie Facades Tape FT

Synergie Membrane DB

Synergie Membrane DB

Synergie Spray Primer SP

Synergie Spray Primer SP

Connection Adhesive AK

Connection Adhesive AK

Synergie Coll Flex CF

Synergie Coll Flex CF

Synergie BOLD SB

Synergie BOLD SB

Synergie Kont SK

Synergie Kont SK

Synergie Catalogue

Synergie Catalogue

Construction Productions Regulation

Construction Productions Regulation

Technical Guidance Document Part D

Technical Guidance Document Part D

Declaration of Performance for Synergie Sd2/100 airtight membrane

Declaration of Performance for Synergie Sd2/100 airtight membrane
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