How to Felt a Shed Roof: A Step-by-Step Guide

If your shed roof is starting to leak or showing signs of wear, it may be time to replace or lay new roofing felt for sheds. Felt for shed roofs is a cost-effective and durable solution that protects your shed from rain, wind, and other weather conditions. Whether your shed is in Bishop’s Stortford, Wood Green, Walthamstow, or anywhere in the UK, this guide will explain how to felt a shed roof with practical tips, detailed steps, and professional advice.

Why You Should Felt Your Shed Roof

A shed roof felt provides several benefits. Most importantly, it keeps your shed waterproof, preventing leaks that can damage stored items or the shed structure itself. High-quality roofing felt is durable and can last 8–10 years with proper care, making it a cost-effective alternative to tiles or metal for small structures. Installing felt on a shed roof is relatively simple and can be completed by skilled homeowners. Additionally, if any damage occurs, small repairs to felt on shed roofs can be completed quickly without replacing the entire surface.

Common Problems a Shed Roof Felt Can Solve

Before installing, it’s helpful to understand why your shed might need a new layer of shed roof felt.

• Leaks and water ingress: Often caused by old, brittle felt or improper overlaps.
• Blisters or bubbles: Usually a sign of trapped moisture or poor adhesion.
• Torn edges or holes: Damaged by wind, fallen branches, or general wear.
• Warped or rotting roof panels: Installing felt for shed roofs can protect and prolong the life of your shed structure.

Tools and Materials You’ll Need

Before starting, gather these essentials:

• Roofing felt (also called tar paper)
• Felt nails or staples
• Roofing adhesive or bitumen (for overlaps and edges)
• Hammer or staple gun
• Ladder and safety gear (gloves, goggles)
• Utility knife
• Measuring tape

How to Felt a Shed Roof: Step-by-Step Guide

1. Prepare the Roof Surface

The first step is to prepare your shed roof thoroughly. Begin by removing any old roofing material, debris, moss, or dust that could prevent the new felt from adhering properly. Check the wooden roof panels for signs of rot, warping, or damage. Any compromised boards should be replaced before proceeding, as felt alone cannot protect a structurally weak roof. A clean, dry, and even surface is essential for a long-lasting installation, so take the time to sweep, repair, and smooth out any imperfections. Ensuring the roof is fully prepared now will reduce the likelihood of leaks or other problems later.

2. Measure and Cut the Felt

Once the roof surface is ready, carefully measure the length and width of each roof panel. Cut strips of roofing felt to match these measurements, leaving extra material along the edges for overlaps of about 50–100mm. The extra margin is essential to create a watertight seal between strips and at the edges of the roof. Taking accurate measurements and cutting the felt carefully ensures that each strip aligns properly during installation, minimizing wrinkles or gaps that could allow water to penetrate.

3. Lay the First Strip

Start laying the felt at the bottom edge of the roof, so water will naturally run over each subsequent layer. Align the first strip along the eaves, leaving a slight overhang to direct water away from the shed walls. Use felt nails or staples to secure the felt evenly across the surface, pressing it flat and smooth to avoid wrinkles or tension. At this stage, it is important not to pull the felt too tight, as it needs some flexibility to expand slightly in warm weather and contract in colder conditions without tearing.

4. Overlap and Secure Additional Strips

With the first strip in place, continue installing the remaining strips working upward from the eaves toward the ridge. Each new strip should overlap the previous one by 50–100mm, and a thin layer of bitumen adhesive can be applied beneath the overlaps to strengthen the waterproof seal. Press down firmly and secure with nails along the overlap edges. Pay particular attention to corners, edges, and ridges, as these are the areas most susceptible to leaks. Proper overlap and adhesion during felting a shed roof ensures the felt on shed remains waterproof for years.

5. Finish the Edges and Inspect

After all strips are installed, fold the felt neatly over the sides of the shed and secure it with additional nails or staples. Apply extra bitumen adhesive along the edges to protect against wind and water penetration. Trim any excess felt carefully to create a neat, professional finish. Conduct a thorough inspection to check for loose sections, wrinkles, or gaps, especially around corners and edges. This final check ensures that the roof is fully sealed and ready to withstand harsh weather.

While many small shed roofs can be felted by homeowners, professional help may sometimes be required to ensure a long-lasting, waterproof finish. Our local roofers can assist with professional roofing services, including shed roofs. Contact us today to protect your shed and ensure your roof stays secure through the UK’s weather.

Tips for a Long-Lasting Felt Shed Roof

To keep your felt shed roof in good condition, regular maintenance is essential.

• Avoid walking on the felt immediately after installation.
• Keep gutters and downpipes clear to prevent water pooling.
• Inspect your roof annually for tears, blisters, or loose sections.
• Use high-quality roofing felt for better durability.

Conclusion

Felt roofing is an affordable, effective, and durable solution for protecting your shed. By carefully preparing the roof, measuring and cutting felt accurately, overlapping sheets correctly, and sealing the edges, you can achieve a long-lasting, waterproof finish. Whether tackling a DIY project or enlisting professional help, following these steps ensures your shed stays dry, secure, and well-maintained through the UK’s changing weather.

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