All buildings, whether large or small, require the design and implementation of openings on most of their outside walls for potential doors and windows. These days, more often than not, during the construction, these holes are marked with PVC-U strips as the walls are built around them. The strips provide an airtight seal that stops hot or cold air from escaping or coming into the building. By avoiding this wasteful exchange of gas, other physical problems can be avoided, like the buildup of damp, causing mold and mildew to spread through internal walls and seriously ruin them.

PVC-U is obtained from old door and window frames that have been removed from buildings. The elements of these frames are extracted and the PVC-U is completely purified and recycled into weather-, damp- and leak-proof cavity seals. They are hardy and last a lifetime, so any worries about draughts and damp … Read the rest