To waterproof a shed, we recommend using an EPDM membrane. Start by measuring the length and width to calculate the size of the membrane you will need. Add 300mm to allow for overhang. Strip back the old roof covering and prepare the surface area, before applying adhesive and the new EPDM membrane.

To waterproof a shed can be a straightforward process, using the right materials suitable for DIY. Traditional felt roofing for sheds is now outdated with the introduction of rubber membranes, such as EPDM. This offers a much longer lifespan and is faster and easier to apply.
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Why EPDM for shed roofs?
EPDM membrane is designed to provide 100% waterproofing for the long term. It has an expected service life of more than 50 years, which could mean that the membrane could outlast the shed. As re-felting the shed has historically been a regular maintenance task, EPDM offers a long-term cost-effective approach.
Further reading:
Buying a shed roof kit
A kit is the perfect way for a DIYer to approach waterproofing a shed. PermaRoof UK stock a range of standard sized EPDM shed roof kits, available off-the-shelf. These complete kits include everything you need to get the job done and come with a lifetime membrane guarantee:
- EPDM membrane (overhang included)
- Spray adhesive
- Sealant
- Installation instructions
- Lifetime Guarantee
Buying a shed roof kit removes the likelihood of over- or under-buying your materials.
Recommended products:
Preparing a shed for waterproofing with EPDM
Remove the existing shed roof covering and remove any grease or oil spots using a solvent-free cleaner. Once the roof is prepared, lay out the membrane over the roof to rest for 30 minutes. This allows packaging creases to dissipate.
Installing a shed roof kit
Installing EPDM rubber on a shed roof is a straightforward process. Watch the video below to see for yourself…
Video guide: How to waterproof a shed:
Here at PermaRoof UK, we support all our customers and answer a variety of flat roofing questions every day. If you have a question, please visit our FAQs page, give us a call on 01773 608 839 or use the live chat for a quick query.
Other articles about how to waterproof a shed:
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Permaroof UK® Ltd
Unit 1
Westway
Cotes Park Industrial Estate
Alfreton
Derbyshire DE55 4QJ
Tel: 01773 608 839
Fax: 01773 608 408
Email: Click here
Registration No. 4109502
VAT No. 764 2785 00
Permaroof (UK) LTD
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Permaroof UK® Ltd
Unit 1
Westway
Cotes Park Industrial Estate
Alfreton
Derbyshire DE55 4QJ
Tel: 01773 608 839
Fax: 01773 608 408
Email: Click here
Registration No. 4109502
VAT No. 764 2785 00
Permaroof (UK) LTD
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