How to Fix a Minor Shed Roof Leak

Overview

A minor shed roof leak can be repaired easily. This guide covers patching a small leak in a shed roof.

Step-by-Step Fix

1. First, step inside your shed during daylight or with a torch and carefully look up at the ceiling and walls for signs of water ingress, such as drips, wet patches, or discolouration. Once located, make a note of the exact spot, perhaps by placing a bucket directly underneath it or marking the ceiling with chalk, as this will help you pinpoint the corresponding area on the roof.
2. Safely access the shed roof, ideally using a stable ladder and having someone to foot it for you, and carefully identify the area directly above your internal leak marker. Thoroughly clean this section of the roof using a stiff brush or cloth to remove any moss, dirt, or debris, ensuring the surface is dry and free from loose material for optimal adhesion.
3. Depending on your chosen method, either apply a generous bead of exterior-grade roofing sealant directly over the suspected leak or firmly press roofing repair tape over the hole, ensuring good overlap. Smooth down the sealant or tape with a scraper or your hand to eliminate any air bubbles and create a watertight seal, checking that all edges are securely bonded to the roof surface.
4. If you are using felt, cut a piece of roofing felt that is significantly larger than the damaged area, ensuring it overlaps by at least 10-15cm on all sides. Position the patch centrally over the leak and secure it firmly in place with galvanised clout nails, spacing them approximately 2-3cm apart around the perimeter and ensuring they penetrate the underlying roof structure.
5. Once the patch is nailed down, generously apply roofing cement or adhesive around all the edges of the felt patch, pressing it down firmly with a trowel or scraper. Ensure the cement extends slightly beyond the felt edges and creates a continuous, smooth, and watertight barrier, preventing any water from seeping underneath the new patch.
6. After completing the repair, carefully inspect the entire shed roof, especially around the repaired area and any other seams or joints, for further signs of potential damage or weaknesses. It's advisable to then wait for the next rainfall to visually confirm that the original leak has been successfully stopped and no new leaks have appeared.

Common Symptoms & Diagnostic Resolutions

Review the common error codes and operating symptoms below to quickly identify the root cause of the fault before ordering replacement parts.

Frequently Asked Questions