Soffits are the essential support to the roofline which links the fascias and bargeboards to the wall, soffits can be vented to allow airflow and ventilation in the loft space. A soffit is a covering which sits between the outer edges of your roof and the adjacent wall of the house, protecting and sealing the rafter feet. If your roof has a soffit (not all do), you will be able to see it if you stand underneath the overhang of your roof and look up. Modern soffits are usually made of uPVC. UPVC soffits and fascias are hardwearing and cope well with exposure to moisture. Wooden soffits are a popular rustic or period feature, but they are more likely to rot and decay quickly, threatening the integrity of the rest of the roof structure.