Airtightness Products

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A comprehensive range of airtightness products for all applications. Browse the categories below for products, or read our 'Guide to Airtightness' below to learn more

We stock the complete range of award-winning Pro Clima airtightness products for almost every conceivable application, walls, floors, ceilings, roofs, external and internal systems plus a wide range of accessories all on 90-day sale or return.

By choosing the Pro Clima range, you can be confident that you are implementing a robust, durable and energy efficient airtight and wind tight design for your build. In a recent independent consumer watchdog publication in Germany 8 leading airtightness system brands were tested. Pro Clima was confirmed as the best and most reliable system on the market.

Browse the categories below to see the products where you will find plenty of information on pricing and delivery, application and use, technical data sheets, installation guidance and more. click the download tab in each category (blue box white writing) for all downloads in that section or use the 'Download' link on the product page for specific information; any questions please call.

Don't forget our 90 day free sale or return promise on all Pro Clima airtightness products 



Leaking buildings are the biggest single waste of energy for most UK buildings

Ecomerchant EPC House

Infiltration or air leakage can account for up to 50% of heat loss in modern homes & increase C02 emissions. It has long been established that ventilation is an absolute & essential part of creating a healthy, comfortable, energy efficient home.

Unfortunately, infiltration (unwanted ventilation / uncontrolled ventilation) or air leakage means that expensive heated air can escape from our homes, wasting valuable energy. This has an expensive, ever increasing premium that is hard on the pocket and hard on the environment. It is a fact that air (energy) leakage is one of the most significant contributors to inefficiently heated homes, which inevitably leads to significantly higher levels of CO2 emissions, not to mention costly waste.

The more we insulate our homes; the impact of infiltration in relation to reducing the performance of the building envelope is drastically increased. Infiltration or air leakage can account for up to 50% of heat losses in modern homes which in turn also leads to significant reductions in the durability & viability of the structure, not to mention the health & comfort of those who live in them.

Reducing energy requirements, energy costs and CO2

Research has shown that approximately 50% of the energy consumed in the UK goes into the servicing of buildings, of which 60% is used for water / space heating and cooling.  A reduction in our reliance on energy in the area of servicing buildings has the highest potential for making the most immediate impact for a reduction in CO2 emissions and energy use.

While the recent government initiatives in the area of supporting the uptake of renewable energy are to be lauded, the performance of such systems is entirely dependent on the quality of the fabric of the construction.

It seems obvious that one should place emphasis on ensuring a properly installed, quality insulation is fitted in the external envelope of the building, and of course, that the building envelope is effectively draught proofed or in other words, Airtight.  However, this is not the case in the majority of homes we build annually.

Fabric First

Modern, low energy buildings, be it Canadian Super E, Passive Houses, German Low Energy Buildings or any other energy efficient construction, individually and collectively place Airtightness as a primary part of achieving a low energy building.

It is really about time that the UK construction industry followed the lead of these innovative methods of low energy construction, if we are to truly prepare and face up to the looming energy and environmental crisis, and build homes that use significantly reduced amounts of energy.  In the past it was very clear that a lot of heat loss through the fabric of the building envelope was as a result of the installation of little or in some cases, no insulation and a very low level of draught sealing of the building envelope.

Intello Plus Membrane

Priority in our building regulations was placed on achieving lower, and lower U-values for each elemental area of the building fabric.  This inevitably leads to lower levels of heat loss as a result of an increase of the insulation.  However, the proportion of heat loss as a result of uncontrolled air leakage through the external envelope of the building has yet to be seriously addressed.  Air leakage allows expensive heated air to escape from our homes and buildings.

Therefore, the most cost effective means of reducing our heating bills and increasing energy efficiency in our homes is to decrease to level of uncontrolled ventilation in the living space.  The only way to ensure this, is to build a fully and properly airtight structure, even if it is an extension to an existing building.

Airtightness creates a comfortable, healthy internal atmosphere

Airtightness also lends itself to a comfortable, healthy internal atmosphere, within the living space and ensures that the building fabric can breathe and is maintained in a healthy condition.  This is especially achievable with the Pro Clima Airtight System which utilises a ‘world first’ intelligent membrane, that manages the inherent moisture out of the structure of the building, even after the building is complete.

A lack of airtightness dramatically increases the risk of mould growth and structural degradation, particularly in light weight construction, leading to costly structural repairs, necessitated by the development of mould, rot, damp and condensation.  This is as a result of the warm moisture laden heated air in the living space, penetrating and rapidly condensing within structural elements.

Airtightness for intelligent moisture management

Intello Plus Tapes

Levels of Airtightness can be achieved by sealing the building envelope by using Vapour Barriers, Vapour Checks, wood based panels (e.g. OSB and plywood)’ 

or by plastering, porous concrete block work.  These methods of achieving Airtightness have their limitations and do not have built-in Structural Protection or Moisture Management abilities, especially if the structure has a high vapour resistance on the exterior side of the construction.

The Pro Clima Airtight System provides intelligent vapour checks which are humidity variable and vapour permeable (e.g. Pro Clima INTELLO+) and a complete solution to potential problems associated with the requirement for airtightness.  Pro Clima also provide a complete range of non-toxic specialist tapes (designed for every construction detail), adhesives, sealing solutions and intelligent membranes to ensure a building is airtight and healthy.

Moisture can enter structural elements.  The more we seal our building envelopes, the greater the need to control moisture levels in structural elements, especially in buildings which are very vapour-tight on the external side of the building fabric and particularly in timber built constructions or timber sections of masonry constructions.

  • Moist laden building components (e.g. insulation or timber materials exposed to high moisture levels on site),
  • By diffusion (e.g. the installation of inappropriate Vapour Checks which do not have the required vapour resistance),
  • By means of moisture laden heated air leaking into the building fabric and rapidly condensing (e.g. Leakages in the overlaps of the Vapour Check or service leaks).

It is impossible to eliminate with certainty the risk of moisture build up in structural elements. The only solution is to install Intelligent Membranes (e.g. Pro Clima INTELLO+)

The world-First Intelligent vapour check, first for airtightness, energy savings and moisture management INTELLO+ is unique in that it regulates (out of the structure) the moisture trapped within structural elements even after the complete building envelope is sealed air tightly, even in constructions which are extremely vapour impermeable on the outside. (Inlus), to seal the building envelope as oppose to regular vapour barriers and foils traditionally used.

Range CompressedHowever, during warmer times of the year (i.e. summer), when condensation risk is at its lowest, INTELLO+ reduces its resistance to vapour transfer by up to 50 times.  In this way, it allows for rapid back drying to the inside.  This Vapour Check provides a very high safety factor, for constructions, against moisture induced structural damage and mould growth.

Rather than achieving temporary airtightness with unsuitable tapes and adhesives, quality, durable tapes, adhesives and sealing solutions should be used.  Pro Clima provide a range of proprietary airtight sealing tapes (e.g. Vana Tape for sealing overlaps of the vapour check and patching, Tescon profil for sealing reveals to name but a few), adhesives and sealing solutions, that are designed to simplify the sealing process in a cost effective way and ensure a durable seal is maintained.  A vapour check provides a very high safety factor, for constructions, against moisture induced structural damage and mould growth.

Once the airtight building is complete it should be viewed in the same manner as one would view a gas pipe or water pipe, it shouldn’t leak on the first day it’s tested, it should maintain an airtight seal for the lifetime of the building and any leaks incurred in the building envelope should be resealed.  During winter months INTELLO+ acts as a very effective vapour check and protects the structure against warm moist air diffusing through the membrane into structural elements.

So where does all the energy go?

To achieve full and proper airtightness, it is most important that all gaps in the building envelope are effectively sealed, particularly in lightweight constructions. Gaps in the envelope may occur at overlapping junctions of the Vapour Check or Barrier which are not sealed correctly, services penetrating the vapour check or barrier, or at junctions between the building envelope, in particular windows and doors. Leakages in the building envelope can be characterised into two categories:

  • STRUCTURAL LEAKS – These are leakages that occur at joints in the building fabric and around reveals (i.e. windows and doors). Structural Leakages often occur at down-lights, loft hatches and separating floors in particular.
  • SERVICE LEAKS – These are leakages that occur where pipes and cables penetrate the external envelope of the building. These can be soil pipes, water pipes, extract vents to name but a few.
Hourse Thermal Image

 

 

The most significant leakages can often be a combination of both structural and service leaks in the building envelope.  Air moving through penetrations in the building envelope can also result in hidden moisture in the construction, which, in turn can lead to condensation, mould growth and building damages.  If moisture laden warm air (i.e. energy leakage), penetrates structural elements from the inside this may cause long-term damage to the viability of the structure & generate increased, life-long heating costs, placing huge demands on energy resources.

In the winter, the warm air escapes, the cold air leaks in to the structure and the heating bills rise.  In the summer, the opposite happens, warm air leaks in and cool air leaks out, leading to overheating and great discomfort for the inhabitants.  Even in the case of refurbishing or adding a room, it is important to tighten the building envelope as much as possible.

Build tight: ventilate right

An Airtight building lends itself to a greater degree of comfort for the inhabitants.  Airtightness is also a precondition for effective sound insulation, consequently, benefiting from greater levels of sound reduction from the external environment.  To maximise the thermal performance of a construction and to ensure the air in the living space remains healthy, some form of controlled ventilation is essential.

This can be in the form of mechanical ventilation with heat recovery or some other form of natural ventilation.  When it comes to Airtightness, “Build Tight, Ventilate Right”, is the only mantra to ensure we improve our buildings, while also reducing this shameful, expensive and un-necessary energy waste.

How to achieve airtightness?

There are three key steps to achieving airtightness in any building type.

   1. Design for Airtightness: To maximise the Airtightness of any building the Designer/Architect plays a pivotal role.  Airtight details for common leakage areas which are difficult for the builder to seal on site can be greatly simplified leading to vast improvements in workmanship. Consequently, superior levels of Airtightness can be achieved and of course significant savings can also be made as a result of time savings on-site, at the installation stage.  The Architect can also specify materials and propriety Airtight Sealing Products which simplify the Airtight sealing process for the installer and guarantee a clean, durable and lifelong seal.

   2. Build for airtightness: When the building is at the construction stage communication between trades is absolutely essential.  It is also essential that the airtight installer maintains a high level of consistency and consciousness to continually seal the airtightness layer at a premium level.

   3. Test for airtightness: After the building has been sealed for Airtightness the construction must be tested to identify the level of airtightness achieved and also to identify leakages in the building envelope.  An Airtightness Test is carried out by a Blower Door Fan, A Blower Door Fan is installed in an external door of the building and this either pressurises or depressurises the whole internal volume of the living space. This test will quickly provide a measured Airtightness Level for the building, and identify leakages in the building envelope.

The importance of getting it right

In the UK it is now a mandatory requirement to carry out Airtightness Measurements on all buildings to a minimum level, as stated in their revised building regulations.  The implementation of Energy Performance Certificates (EPC's) for all buildings has placed more emphasis than ever before on addressing the high level of heat loss, directly resulting from a lack of Airtightness in our homes.

SAP Form

The calculation tool used to assess a buildings energy performance (SAP - Standard Assessment Procedure), now dedicates an entire section to heat loss, associated with uncontrolled ventilation.  However, it is somewhat disconcerting that in this section one has the option of inputting ‘Measured Airtightness Results’ from a blower door test for a building; or to input a default airtight value, depending on the building types.

While this is in some ways positive, in that it highlights the importance of achieving a certain level of airtightness, it is unfortunate that Airtightness Testing has not been identified as a mandatory requirement for achieving the pre-stated values.  As one has the option of entering default values this will simply allow the user to over-ride the absolutely critical requirement for Airtightness, which is the most important structural element to truly reduce the energy-in-use in the building.  If one inserts a default value for achieving Airtightness, it should be stressed in the SAP calculation that measures should be taken to achieve the stated default Airtightness Values.  An Airtightness Test not only identifies leakages in the building envelope, and provides an exact measurement of the level of Airtightness in a building.  It also forms a critical link in the chain of command, from theoretical calculated values for thermal performance and uncontrolled ventilation, to on site practice, which is so badly needed on building sites around the country.

Airtightness Testing leads to better on site work practice, communication between onsite trades, significantly and critically improved energy efficient design, not to mention the additional benefit of much required, quality control, to building, in general.

At what cost

A gap in the buildings Airtightness layer multiplies the energy consumption for heating per m2 many times.  An Airtight building not only lends itself to tremendous reductions in CO2 emissions, it also leads to a more healthy and comfortable home for the homeowner and a greater level of confidence and trust in the builder, leading to a win-win situation all round.  Intelligent Airtightness, such as that achievable through the Pro Clima System, can be achieved at a fraction of one percent of the total build cost and allows for significant savings to be made on energy costs and potential structural repairs, through-out the lifetime of the building.

Ecomerchant Part L2APart L of the UK building regulations has been focused for some time now on increasing our insulation levels throughout our homes.  Of course, the addition of more insulation in our homes is a critical element to reducing fabric heat loss.  However, there comes a point where it would be much more effective to focus on reducing heat loss as result of uncontrolled ventilation in our homes.

A sufficiently airtight home is the only way that ANY insulation, can actually work to 100% of its ability.  Thankfully, currently there is a justified focus on renewable energy sources for our homes and offices.  This is to be commended.  However, if the building is not Airtight, the energy, still escapes, in many ways defeating the initial purpose.  Until our building regulations seriously addresses this issue, a lack of Airtightness will always be the primary leak in our heating budgets, causing un-necessary energy loss, strain on our pockets, potential structural damage, and additional environmental damage in a time of precarious balance, not to mention the negative impact on our own health. 

 

Editor’s note:

Thanks to Niall Crosson and Ecological Building Systems for compiling this guide.


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  1. Pro Clima DA 2

    Pro Clima DA Weather Resistant Airtight & Vapour Check Membrane 1.5m x 50m

    £133.00
    Vapour check and airtightness membrane for above-rafter insulation

    For use as a water-tight vapour check and airtightness membrane on sarking boards under insulation above the rafters. Suitable for all externally diffusion-permeable roof structures.

    • Provides protection against the elements duringthe construction phase
    • Water-resistant and waterproof
    • Can be walked on
    • Acts as a vapour check and airtightness layer simultaneously
    • DA connect: With 2 self-adhesive zones for rapid airtightness

    DA 1.5m x 50m roll covers 75m² and weighs 11kgs there are 20 rolls on a pallet  

    Price is per roll

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  2. Blowerproof Non Shrink Gap Filling Mortar 5Kg

    Blowerproof Non Shrink Gap Filling Mortar 5Kg

    £9.67

    Blowerproof Gap Filling Mortar is a rapid hardening, non-shrink, cementitious mortar for gap filling. Designed for use to fill gaps greater than 5mm when using Blowerproof Liquid Brush, Blowerproof Liquid Roller and Blowerproof Liquid Spray.

    Advantages

    • Non shrink
    • Rapid setting
    • Easy to use
    • Requires no specialist skills or tools
    • Repairs can be carried out quickly
    • Can be applied in most weather conditions
    • Supplied prepacked for immediate use

    For use on gaps greater than 5mm. Approved installers of Blowerproof recommend the use of a cementitious compound to close gaps as a more robust, durable and effective substrate for the application of the liquid membrane. This also avoids toxicity issues relating to PIR foams, dealing with foam waste trimmings and possible shrinkage.

    Composition

    Blowerproof Gap Filling Mortar is a polymer modified mortar supplied in a 5-litre waterproof pail. Inside is 5kgs of premixed powder requiring the addition of 900ml of clean potable water.

    Price is per 5Kg tub

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  3. Blowerproof Liquid 'Brush'  WHITE - Paint On Airtight Sealing For Plasterboard & MgO Boards ,Blockwork & Masonry 5kg Tub

    Blowerproof Liquid 'Brush' WHITE - Paint On Airtight Sealing For Plasterboard & MgO Boards ,Blockwork & Masonry 5kg Tub

    £49.99

    Blowerproof WHITE Liquid Brush is used for the discrete airtight sealing of boards, blockwork and masonry prior to the application of a plaster skim

    This highly flexible liquid applied membrane is the perfect solution for sealing joints, corners and penetrations when using plaster as the principle airtight layer.

    Board junctions, edges and corners are more likely to suffer from movement cracks, using Blowerproof WHITE Liquid Brush eliminates leakage through movement or cracks due to plaster shrinkage.

    Quick and easy to apply by brush the membrane can be directly over plastered, and being white remains invisible behind the plaster.

    Bloweproof  WHITE Liquid 'Brush' is a VOC free, water based, flexible, fibre reinforced, polymer suitable for airtight sealing in both new build and retrofit.

    Blowerproof liquid creates a seamless, continuous air and vapour -tight seal over cracks and gaps. Because the seal perfectly follows the contours of the substrate and in combination with the high flexibility and superior adhesion, the connections remain airtight over the long term. Blowerproof liquid is the fast, flexible and durable solution for all airtight connections.

    Ideal for sealing

    • Wall to wall junctions
    • Floor to wall junctions
    • Ceiling to wall junctions
    • Service penetrations, pipes, cable, ducting etc
    • Window / door jambs

    Blowerproof WHITE Liquid Brush comes in a re-sealable 5kg tub. Allow up to 1kg per square metre on highly porous surfaces for non-porous surfaces allow 750grams per square metre.

    One 5kg tub will cover approximately 83 linear metres at 75mm wide.

    Price is per 5kg tub

    Ecomerchant Blowerproof BBA Logo

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  4. Blowerproof Liquid 'Brush' "Handypack" - A Paint On Airtight Sealing Membrane (2.5kg)

    Blowerproof Liquid 'Brush' "Handypack" - A Paint On Airtight Sealing Membrane (2.5kg)

    £27.99
    Blowerproof Liquid 'Brush' "Handypack" is a VOC free, water based, flexible, fibre reinforced, polymer providing a unique and sustainable solution for the production of airtight building connections in both new build and retrofit.

    A great size pack to keep handy for smaller jobs and sealing penetrations, keep one in your van.

    Ecomerchant Blowerproof Liquid Brush

    The water based polymer is brush applied to create an uninterrupted air and vapour -tight seal around penetrations, and for floor / wall connections, wall / ceiling joints, and roof connections

    Blowerproof liquid creates a seamless, continuous air and vapour -tight seal over cracks and gaps. Because the seal perfectly follows the contours of the substrate and in combination with the high flexibility and superior adhesion, the connections remain airtight over the long term. Blowerproof liquid is the fast, flexible and durable solution for all airtight connections.

    Ideal for sealing

    • Service penetrations, pipes, cable, ducting etc
    • Floor to wall junctions
    • Ceiling to wall junctions
    • Window / door jambs
    • Steel decks

    Blowerproof Liquid Brush "Handypack" comes in a re-sealable 2.5kg tub. Allow up to 1kg per square metre on highly porous surfaces for non porous surfaces allow 750grams per square metre. Also available as Blowerproof Liquid Spray - please call for the spray version.

    One 2.5kg tub will cover approximately 41 linear metres at 75mm wide.

    Price is per tub

    Ecomerchant Blowerproof BBA Logo

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  5. Blowerproof 30 Day Professional Masking Tape 48mm x 50m

    Blowerproof 30 Day Professional Masking Tape 48mm x 50m

    Regular Price: £9.94

    Special Price £6.59

    A 30 Day temperature and water resistant masking tape, as the name implies BP914 stays put for 30 days, leaves no residue and is designed for use with Blowerproof Liquid Membranes, but also has many other construction applications where protection is required especially over a period of time or between trades.

    BP 914 has a water based acrylic adhesive designed fto give long term adhesion plus a clean residue free peel away. BP914 can be used on most surfaces, no primer is required. BP914 maintains its characteristics for 30 days with no deterioration allowing early application or extended periods with no loss of adhesion or performance. 

    Use for masking 

    • Windows and doors
    • Pipework and ducting
    • Timber framework
    • Panels and boards
    • Blockwork and masonry
    • Steel decks

    Features

    • Internal or external
    • Adheres to a wide range of surfaces
    • Requires no primer
    • leaves no residue
    • UV stable
    • Weather proof
    • Heat resistant to 110oC
    Price is per roll Learn More
  6. Blowerproof Liquid - A Roll-On/Spray-On Airtight Sealing Membrane 10kg

    Blowerproof Liquid - A Roll-On/Spray-On Airtight Sealing Membrane 10kg

    £94.99

    Blowerproof Liquid Roller/Spray is a VOC free, water based, flexible, polymer providing a unique and sustainable solution for the production of airtight buildings in both new build and retrofit.

    Ecomerchant Blowerproof Liquid Brush

    The water based polymer is roller/spray applied to create an uninterrupted air and vapour -tight seal.

    Blowerproof liquid creates a seamless, continuous air and vapour -tight seal over cracks and gaps. Because the seal perfectly follows the contours of the substrate and in combination with the high flexibility and superior adhesion, the connections remain airtight over the long term. Blowerproof liquid is the fast, flexible and durable solution for all airtight connections.

     

    Ideal for sealing

    • walls
    • ceilings
    • larger areas

     

    Blowerproof Liquid Roller/Spray comes in a re-sealable 10kg tub. Allow up to 1kg per square metre on highly porous surfaces for smooth non porous surfaces allow 750grams per square metre. 

    One 10kg tub will cover approximately 10m2 

    Price is per tub

    Ecomerchant Blowerproof BBA Logo

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  7. Steico Protect DRY Internal & External Wood Fibre Render/Plaster Carrying Board 1325mm x 600mm. 40, 60 & 80mm thick

    Steico Protect DRY Internal & External Wood Fibre Render/Plaster Carrying Board 1325mm x 600mm. 40, 60 & 80mm thick

    Steico Protect DRY is a natural render/plaster carrying wood fibre insulation board with a tongue and groove profile manufactured in accordance with EN 13171, designed both as an external sheathing board for timber frame constructions or for direct to masonry applications in external wall insulation systems where the render is applied directly to the board and as an internal plaster carrying board for direct fixing to timber frames without the need for a supporting backer board

    It is quite common for architects and designers to specify Protect DRY boards in certain building applications and in combination with a separately specified finish or render system,

    Board size 1325mm x 600mm. Board Coverage: 0.747m2 / board

    Available in 40mm, 60mm & 80mm thicknesses. Other thicknesses are available please contact us for details.

    Price is per board

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  8. Tescon Sprimer - Spray Primer for Pro Clima Airtight Tapes 750ml can

    Tescon Sprimer - Spray Primer for Pro Clima Airtight Tapes 750ml can

    £15.95

    Brand new to the Pro Clima range TESCON SPRIMER is a Sprayable Primer for wood, wood-fibre boards, masonry, roofs, walls and ground slabs. After the Sprimer has been applied Pro Clima adhesive tapes such as TESCON VANA, CONTEGA SOLIDO & the EXTOSEAL range can be applied.

    Benefits of Tescon Sprimer

    • Quick and easy to apply – no chance of contamination of the primer
    • Clean to apply with no mess.
    • Time-saving – no drying time tapes can be applied immediately
    • No brush or other tools required.
    • Deeply penetrates the substrate forming a super secure bond.
    • Strengthens dusty substrates or surfaces with insufficient loadbearing capacity.
    • Ideal for difficult to reach areas or where access is restricted where use of a brush-on primer would be problematic.
    • No toxic or harmful ingredients.
    • Can be applied during frosty conditions

    Coverage – 60mm wide application will yield approx. 38m per 750ml

    75mm wide application will yield approx. 31m per 750ml can.

    Price is per 750ml can.

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  9. Compego waterproof adhesive tape for airtight DPM bonding 60mm x 25m

    Compego waterproof adhesive tape for airtight DPM bonding 60mm x 25m

    £17.00

    COMPEGO’s pressure activated waterproof adhesive is specially designed for airtight bonding to sub-slab vapour barriers and Pro Clima membranes. Compego is a versatile and handy ‘get out of jail free’ product for a range of building applications where there is simply nothing else with the same ease of application or performance characteristics.

    COMPEGO’s high strength waterproof adhesive is specially designed for airtight bonding to sub-slab (DPM) vapour barriers, including polythene, including tray connections in cavity walls also works well on gritty bituminous membranes when primer is pre-applied.

    This stretchy and flexible tape is also good for airtight sealing membranes, OSB, plywood, wooden panels or metal components and other low viscosity surface materials. It can be used on the interior or exterior of the building.

    Advantages

    • Pressure activated adhesive bond grows stronger over time, allows for easy tape repositioning pre-pressurization
    • Waterproof, with stretchable PE backing; rated for 6 months of exposure
    • Can be applied from -10° C
    • 6 months of outdoor exposure
    • With elastic backing can be torn by hand
    • For airtight bonds according to DIN 4108-7, SIA 180 and OENORM B 8110-2
    • Waterproof adhesive Lowest VOC rating in hazardous substance test 

    Roll size
    60 mm x 25 m 

    Price is per roll

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