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Airtightness

Airtight products are necessary for creating a thermally insulated home. Learn more about these below.
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Airtightness for low-energy and Passivhaus homes

We provide top of the line airtightness products to help create an airtight environment in your home. When collaborating on Passivhaus and energy efficient renovation projects, our experts advise on how to create an airtight seal on a home by suggesting airtight products and providing guidance on how to use them.

Airtightness is a fundamental component of any low-energy, Passivhaus, or high-performance building. It involves creating a continuous, controlled air barrier around the building envelope to prevent unwanted heat loss and air infiltration.

When implemented correctly, airtightness:-

* Reduces carbon emissions

* Lowers heating and cooling costs 

* Improves indoor air quality 

* Enhances thermal comfort 

* Increases the performance of MVHR systems

Why airtightness matters

Air leakage can account for up to 30% of energy loss in traditional homes. A well-sealed building envelope:-

* Minimises draughts 

* Controls moisture and condensation risks

* Creates a stable, energy-efficient indoor environment.

Airtight construction is especially important in retrofits, low-energy new builds, and Passive House-standard projects.

Pro Clima aitightness systems

21 Degrees stocks the full 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.

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 eight leading airtightness system brands were tested. Pro Clima was confirmed as the best and most reliable system on the market.

Why choose Pro Clima airtight products?

Long term durability and performance

Excellent vapour control for moisture safety

Easy to install with a wide range of accessories

Airtight products available

These airtight products, when used together, create an airtight seal around a home.

Airtight Products include:

Internal Membranes: Used to line the inside walls, ceilings, and floors of a home and is typically paired with an external membrane.

External Membranes: Used to line the outside orf walls, ceilings, and floors of a home. 

Tapes: Used to create an airtight seal around joins, pipes, uneven surfaces, around window seals, and other common thermal bridging areas.

Grommets: Used to create airtight seals around pipes

Adhesives: Used to connect airtight products together and create a further airtight seal.

Paints and Sprays: Create an airtight seal over a large area

Airtightness FAQs

  • Airtightness can be achieved through expert detailing and construction using airtight products such as Pro Clima. Membranes are used on both internal end external walls to create two airtight seals with insulation between. Tapes and grommets and used to seal areas around ducts, windows, and other common thermal bridges. Paints are used to create a further airtight seal around these areas.

  • Most heat is lost through drafts and thermal bridges. By creating an airtight environment in your home, and pairing this with an MVHR system, you can ensure that your home will stay warm during the winter with minimal heating. The MVHR system ensures that fresh, filtered  air is distributed throughout the home.

  • This is where the MVHR system comes in. These systems distribute filtered air throughout a home, while removing old, stuffy air. This ensures that your home stays comfortable while your heating bill stays low.

Need help with airtight design?

Our team at 21 Degrees can assist with:

* Airtightness detail and design

* Product section guidance

* On site support and advice

Contact us today to speak with an airtightness expert or to request a quote for your project
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