Sealing Perimeter Flashings in Roofing and Cladding Systems

Most buildings rely on trims and flashings to seal the entire perimeter of the building. They come in the form of thin pieces of impervious material with the purpose of preventing water from reaching parts of the structure. It’s used as an important part of a weather resistant barrier system. It needs to be durable enough to withstand various temperatures and climates. High-quality flashing decreases the amount of water that reaches chimneys, windows, vent pipes and doors etc.

Flashing makes modern buildings more durable and helps to reduce the chance of mould growing indoors. This is especially important in damp rooms such as bathrooms and garages, where the extra moisture causes bacteria to grow and multiply to form mould. Most metal flashing materials are made from lead, stainless steel, aluminium or copper etc. When you need to seal the perimeter flashings of your building, you need to make sure to use a waterproofing sealant that can withstand harsh weather conditions without losing its initial strength.

Before WT1 and CT1 came onto the market, people used other methods to prevent water damage. This included simple procedures such as angling roof shingles away from the joint. Another method used in the past was to build extra steps into the sides of the chimney so that water would be “thrown off” while the seams where covered with various roofing materials. However, these methods were not the best solution to the problem. Roof flashing is a lot more effective at decreasing water penetration. It can be both exposed and concealed with exposed flashing usually consisting of a sheet metal. Concealed flashing is usually backed by an adhesive (such as CT1 from C-Tec) and used for wall penetrations such as door openings and windows.

Sealing with WT1 and CT1

You can seal the perimeter flashings of your roof or cladding system using CT1. This hybrid formulation embodies the qualities of both sealants and adhesives. It provides a strong bond that is flexible and durable, making it ideal for exterior use. It is also used to bond wood, glass, mirror, tiles and many more materials.

To ensure your roof is 100% waterproofed, you can use WT1 as the perfect replacement for bitumen based roof membranes. It adheres to stone, concrete, metal, lead and brick in a matter of minutes, providing a complete waterproof barrier to protect your roof against water damage. It’s also great for repairing cracks on the surface without shrinking and flaking. It remains stable in different weather fluctuations and is perfect for repairing both flat and sloping roofs. Only one application is needed. This means once you waterproof your roof with WT1, you won’t have to revisit the same job again. You can apply WT1 straight from the container and use it with other products from the C-Tec adhesive range including CT1.