A1 Roofing Maidstone

As a homeowner in Kent, you may be wondering if it's possible to felt over old felt on a shed roof. At DK Roofing & Building Limited, we're here to provide you with expert advice and guidance on this common query.

Before we dive into the answer, it's essential to understand the structure of a typical shed roof. A shed roof consists of wooden boards, usually 18mm or 22mm thick, that are nailed along the length of the roof. The boards are then covered with a layer of roofing felt, which is designed to provide a waterproof barrier.

In some cases, it is possible to felt over old felt on a shed roof. However, this approach is not always recommended. If the old felt is still in good condition, and the underlying boards are sound, you may be able to apply a new layer of felt on top. This can be a cost-effective solution, especially if the old felt is still providing some level of waterproofing.

If you decide to felt over old felt, it's crucial to ensure that the old felt is securely attached to the wooden boards. You'll need to inspect the roof carefully, checking for any signs of damage, rot, or wear. If the old felt is loose or damaged, it's best to remove it entirely and start with a new layer.

Before applying new felt, you'll need to prepare the roof surface. This involves cleaning the old felt to remove any dirt, debris, or old nails. You may also need to replace any damaged or rotten wooden boards to ensure a sound surface for the new felt.

When applying new felt, it's essential to follow the manufacturer's instructions. Typically, you'll need to apply a layer of underlay material, followed by the new felt sheet. The felt sheet should be cut to size, ensuring a 50mm overlap along the edges. The felt should be nailed to the wooden boards using roofing nails, spaced at 150mm intervals.

When felting over old felt, it's crucial to pay attention to the edge and end details. The new felt should be cut to fit snugly around the edges of the roof, ensuring a watertight seal. The ends of the felt should be folded over twice, creating a secure and watertight joint.

Felt over old felt on a shed roof in Kent can be a viable option, but it's essential to approach with caution. If you're unsure about the condition of your shed roof or the best course of action, it's always best to consult with a professional roofing contractor like DK Roofing & Building Limited. We'll be happy to assess your roof and provide expert advice on the best solution for your needs.