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How to Felt a Shed Roof

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Adding roofing felt to a shed is an important part of protecting the shed from harsh weather and making sure it looks great all year round. It may seem like a tedious task but felting a shed roof is actually straightforward if you know how.

Our step by step guide includes everything you need know about what you will need, removing old roofing felt and adding new felt to your shed roof. We recommend replacing your shed roofing felt every few years if it is exposed to harsh weather. You won’t need to do this so regularly if it’s in a more sheltered spot.

What you will need:

  • Craft knife
  • Tape measure
  • Hammer
  • Roofing Felt
  • Felt and wood nails
  • Paint brush
  • Felt Adhesive

Step 1: Removing old roofing felt

Dismantle any existing timber fascia boards and put them to one side. Then use a claw hammer to remove any nails holding down the old roofing felt. Make sure the surface is clear of any nails which are sticking out and debris. If you see any obvious hazards, remove or flatten these first.

Step 2: Measure the amount of felt you will need

Before installing the roofing felt, measure the shed roof. Pull it tight so that it lies flat on the shed roof. You’ll need to cover the entire area of the roof with a little extra on each edge to allow for overlaps (around 5cm). Also at the gable ends (7.5cm).

When adding roofing felt to your shed you’ll need to cut approximately three pieces of felt, although though this can vary depending on size. One piece is on each side of the roof as well as a third section to overlap the panels on the sides. Leave a 30cm overlap.

Step 3: Applying new roofing felt to the shed

After you’ve cut the right sized felt and nailed it at 10cm intervals, pulling it tight so that it lies flat along the length of the shed roof. Nail along the bottom edge of the roof, hammering it in at wider intervals – around one every 30cm.

Once the side panels have been secured in place, add the top section to the ridge and fix it using felt adhesive. Apply with a paint brush, then nail it at the lower edge at 5cm intervals.

Step 4: Tidy the corners of the overhangs

Fold down the felt at each corner of the roof, then nail it securely. Use a craft knife to cut a slit in the felt overhang at the apex of the shed roof. After this, fold the felt down in this section and secure at 10 cm intervals along the gable.

Once you’ve nailed it down securely, you can re-attach the fascia boards to keep your shed looking tidy by hiding the folded roofing felt at each gable end. Use wood nails to secure it all in place and then trim off any excess material. 

For more information about all things sheds, check out our Advanced Guide to Sheds which covers how to apply treatment to your shed, insulation and so much more! 

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