Wraptite® - External Self Adhesive Air Tight Membrane

Wraptite Preformed Airtight Corners have been developed for the difficult areas around doors and windows where maintaining good air barrier continuity is difficult and time consuming. Wraptite corners’ simple design and installation process makes sealing openings against air leakage simple, just peel off the release liner, stick the corners in place, then install the Wraptite membrane as normal. This helps achieve the best possible results in the shortest possible time.

Once installed, the corner sections provide the same vapour permeable air barrier performance as the Wraptite membrane itself, ensuring air leakage and water ingress are minimised without trapping construction moisture or causing condensation.

Cross Laminated Timber, or CLT, is an engineered timber product that consists of planks of sawn, glued, and layered wood, where each layer is oriented perpendicular to the previous. By joining layers of wood at perpendicular angles, structural rigidity for the panel is obtained in both directions, similar to plywood but with thicker components. In this way, the panel has great tensile and compressive strength.

CLT is claimed to consume only 50% of the energy required to produce concrete and a mere 1% of that needed to produce steel.
Prefabricated panels can be delivered to site as they are needed, making this construction method ideal for schemes with limited on-site storage capacity. They are then lifted into place, using pre-installed lifting straps, and rapidly assembled, greatly reducing construction time and therefore cost.
It’s a sustainable material because it’s composed of wood, a renewable resource (usually from reforestation), and doesn’t require the burning of fossil fuels during its production. CLT buildings are gaining traction, as they are often cheaper, quicker, cleaner and quieter to build than traditional structures.
The panels can function as walls, floors, furniture, ceilings, and roofs; CLT’s thickness and length can be adaptable to the demands of each project.

• As a renewable material, stores carbon throughout its usable lifespan
• Avoids thermal bridging (in parapet walls or flat roof solutions)
• Good delivery of airtight envelope
• Greater load distribution can reduce thickness of transfer slabs
• Simple and fast onsite construction process
• Vapour-permeable wall construction

• Requires completed designs ahead of start on site, to allow for offsite manufacture
• Use limited to above damp-proof course or equivalent level
• Requires accurately set out groundworks
• Requires external cladding or render to provide weatherproof envelope

CLT panels should be protected from moisture during construction and allowed to sufficiently dry before the application of linings. This includes adequate protection from rain and ground water on site. High initial moisture content of the timber elements — through exposure to weather during construction — creates a potential for interstitial condensation.
An air barrier, like Wraptite, should be installed on the outside face of the panels. The boards within the panels are not edge-glued, and therefore without this air barrier, leakage may occur.

Combining vapour permeability and airtightness in a self-adhering membrane, Wraptite offers a fast and effective solution to unplanned air leakage and its detrimental effects on energy performance. Wraptite not only ensures an airtight seal but resistance at laps against water penetration, dust, air infiltration and wind resistance making it an ideal choice for this application.