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How to Re-Felt a Shed Roof

Posted on by Editor

Felt helps to protect your shed from different weather fronts and prevents deterioration. It’s important that you re-felt your shed roof if you see any signs of damage, or if your roofing felt is around 10 years old. At around 10 years old, your felt will be showing the signs of weathering and may not be protecting your shed as well as it could be.

Remove Old Roofing Felt

Claw Hammer Removing NailBefore adding the new felt to your shed, you will need to remove the old roofing felt. You can do this by dismantling any existing fascia boards and placing them to one side. Using a claw hammer, remove any nails holding down the old roofing felt and ensure that the surface is clear of any sharp objects or debris.

If removing the felt reveals that your roof is rotten or damaged, you should consider replacing the timber prior to felting the roof.

Measuring The New Felt

Unroll your roofing felt onto a clean, dry surface and avoid working with it in cold, wet or windy conditions.75mm overlapsGable and Eaves Roof Diagram

Measure the roof of your shed along the bottom (the eaves) and up the diagonal end (the gable), adding 50mm to overhang for each gable end and the eaves of the shed. When adding roofing felt to your shed you’ll need approximately three pieces of felt, although though this can vary depending on size. The felt will be applied in strips, with each strip overlapping the previous one by at least 75mm (see image). A final length sheet will be required along the ridge.

Once you have finished measuring your felt, take a sharp knife and carefully cut into strips

Installing The Roofing Felt

After the felt has been cut to the correct size, position the first length of felt at the lowest part of the shed, not forgetting to make it overhang the eaves and each gable by 50mm. Pull the felt tight and nail along the top edge of the felt at 500mm intervals.illustration-04

Untitled design (2)To fold over the gables and eaves, begin at the centre of the eave and fold the overhanging felt over the edge of the roof and secure using nails at 50mm intervals.

Repeat this process for each of your felt strips, using roofing sheet adhesive and a disposable brush where the sheets overlap.

You should finish installing the felt with a capping sheet along the ridge. This is installed by placing the sheet along the ridge so that it overhangs each side of the roof equally. You should always ensure that it overlays your top strips of felt by at least 75mm. Secure with roofing felt adhesive to the underside and press the sheet into place. Finally, nail along the bottom of each side of the sheet at 50mm intervals. illustration-06

Once all of the roofing felt has been nailed down securely, you can reattach the fascia boards to hide the folded roofing felt at each gable end. Any excess material can now be trimmed off.

Contact Sunningdale Timber

Sunningdale Timber are timber and shed specialists based in Leicester. If you require any advice on re-felting your shed roof, or if you’re looking to purchase a brand new shed, then please get in touch with a member of our team on 0116 2312876.

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