A PVC fascia board is the elongated, straight board positioned along the lower edge of the roof, where it intersects with the outer walls of the house. Its primary function is to support the lower edge of the bottom row of roof tiles, shield the roof rafters, and accommodate the guttering. Meanwhile, a PVC soffit is a flat board nestled beneath the fascia board. It conceals the roof overhang from below and safeguards the exposed section of the roof between the external wall and the fascia. For further information, delve into our comprehensive PVC Fascias and Soffits guide.