How to Replace a Garage Roof Fast

If your garage roof has seen better days, replacing it yourself with EPDM rubber is a cost-effective and long-lasting solution. EPDM (Ethylene Propylene Diene Monomer) is a durable, weather-resistant material that’s easy to install, making it ideal for DIY enthusiasts. In this article, we’ll walk you through the steps to replace your garage roof and ensure it remains waterproof for years to come.

Why Choose EPDM for Your Garage Roof?

EPDM rubber is an excellent choice for flat or low-pitched garage roofs due to its:

• Durability – Lasts up to 50 years with minimal maintenance.
• Weather Resistance – Withstands extreme temperatures, UV rays, and heavy rain.
• Easy Installation – Can be installed in a single sheet, reducing the risk of leaks.
• Low Maintenance – Requires little upkeep once installed.

Tools and Materials You’ll Need

Before starting, gather the following:

• EPDM rubber membrane (pre-measured for your roof size)
• Water-based or contact adhesive
• Roller and paintbrush for adhesive application
• EPDM roller for smoothing out the membrane
• Utility knife or EPDM scissors
• Measuring tape
• Roof deck boards (if replacement is needed)
• EPDM-compatible edge trims and sealant

Simplify the entire project by starting with a complete garage roof kit. Our range includes standard-sized single and double-garage kits and an option to have your EPDM RubberCover cut to any size up to 15m x 60m. You enter the size of the membrane required and our team will do the rest, ensuring you have all the materials you need in the right quantities. All you'll need to do while you wait for your kit to arrive is gather the tools.

Step-by-Step Guide to Replacing Your Garage Roof

Step 1: Remove the Old Roof

• Strip off the old roofing material, including any felt, asphalt, or damaged boards.
• Inspect the roof deck – replace any rotten or weak sections to create a solid base for the EPDM.
• Ensure the surface is clean, dry, and free from debris before proceeding.

Step 2: Prepare the Roof for EPDM

• If needed, install new plywood, OSB or recovery boards for a smooth surface.
• Check for any protruding nails or screws and smooth out rough areas.
• Lay out the EPDM membrane loosely over the roof to allow it to relax for at least 30 minutes.

Step 3: Apply Adhesive & Lay the EPDM

• Fold back half of the EPDM membrane and apply the water-based adhesive to the roof deck.
• Use a roller to spread the adhesive evenly.
• Carefully lay the EPDM back down, smoothing it out with a roller to remove any air bubbles.
• Repeat the process on the other half of the roof.

Step 4: Secure the Edges

• Trim any excess EPDM using a utility knife or sharp scissors.
• Install EPDM-compatible trims around the edges to prevent water ingress.
• Apply sealant at joints and seams for extra waterproofing.

Step 5: Final Checks & Maintenance Tips

• Ensure all edges are securely sealed.
• Check for any trapped air bubbles – smooth them out with the roller or a soft household broom.
• Inspect the roof periodically and keep it free of debris to maintain its longevity.

Enjoy a Long-Lasting, Leak-Free Garage Roof

By following these steps, you’ll have a sturdy, waterproof garage roof that will stand the test of time. EPDM rubber is a fantastic option for DIYers looking to save money while achieving professional results. Ready to get started on your garage roof replacement? With the right tools and a bit of patience, you’ll have a high-quality, weatherproof finish in no time! Browse our range of roofing kits here or give the team a call if you need any help with your order.

Frequently asked questions about replacing a garage roof:

What is the best material for a garage roof?

• The best material depends on your needs, but EPDM rubber is a top choice for its durability, weather resistance, and long lifespan. Other options include liquid roofing, metal sheets, and polycarbonate panels.

How long should a garage roof last?

• It depends on the material:
  • Felt: 2-10 years
  • EPDM Rubber: 50 years plus
  • Metal: 25-40 years
  • Liquid Roofing: 20-25 years

Do I need planning permission to replace my garage roof?

• In most cases, no. If you are replacing the roof with the same type of material and not increasing the height, planning permission isn’t required. However, if your garage is part of a listed building or you’re making significant structural changes, you may need to check local regulations.

How do I stop my garage roof from leaking?

• First, identify the source of the leak. Small cracks or gaps can be sealed with a waterproof sealant. If the felt is damaged, consider replacing it with EPDM or liquid roofing for a longer-lasting solution.

Can I apply a waterproof coating to my existing garage roof?

• Yes! Liquid roofing is an excellent way to waterproof an existing roof, especially if you don’t want to replace the entire structure. Just make sure the surface is clean and prepared properly before application.

How much does it cost to replace a garage roof?

• Costs vary based on the material:
  • Felt: £300-£800 (cheaper but needs replacement sooner)
  • EPDM Rubber: £600-£1,200 (long-lasting and cost-effective)
  • Metal Sheets: £800-£1,500 (durable but more expensive)
  • Liquid Roofing: £600-£1,000 (good for existing roofs)

Can I replace my garage roof myself?

• Yes! EPDM and felt can be DIY-friendly, while metal sheets and liquid roofing may require more skill. If you're comfortable with basic roofing work, EPDM is a great option due to its simple application process.

Should I insulate my garage roof?

• If you use your garage frequently (as a workshop or storage for temperature-sensitive items), insulating the roof can help regulate temperature and reduce condensation. You can use rigid foam boards or foil-backed insulation.

How do I prevent condensation in my garage?

• Proper ventilation is key. Ensure your garage has vents to allow air circulation. Using breathable roofing materials like EPDM instead of felt can also help reduce moisture buildup.