Garage Roof Replacement: Options & Costs 2026

Garage roof replacement options compared

Felt is the cheapest covering but the shortest-lived, at around 10–15 years. EPDM rubber is a single-ply membrane that lasts 30–50 years and is fitted in one seamless sheet. GRP fibreglass gives a hard, seamless finish lasting 25–30 years. Box-profile metal suits pitched or lean-to garages, and a tiled pitched roof matches the house but costs the most. The right choice depends on the roof shape and how long you want it to last.

Garage roof cost 2026

For a single flat garage roof in 2026, budget around £600–£1,200 for felt, £1,000–£2,000 for EPDM rubber and £1,200–£2,500 for GRP fibreglass. A double or larger garage, stripping the old deck, replacing rotten timbers or adding insulation all push the figure higher. Pitched tiled or metal roofs are priced separately by area.

Flat vs pitched garage roofs

Most garages have a flat roof, where EPDM or GRP give the best balance of cost and lifespan. A pitched roof sheds water better and can match the house, but costs more and may affect the garage's height and planning status. If you plan to convert the garage later, a warm, insulated roof deck is worth specifying now.

How to choose and compare quotes

1. Check the deck and structure

Have the roof deck and timbers inspected — rotten boards or joists must be replaced before the new covering goes on.

2. Choose the covering

EPDM or GRP for a long-lasting flat roof, felt for a budget fix, metal or tiles for a pitched garage.

3. Add insulation if you will use the garage

If the garage will become a room or workshop, specify a warm, insulated roof build-up now.

4. Get three like-for-like quotes

Compare on the same covering, deck repairs and insulation so you judge quality, not just price.

FAQs

Related guides

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• Pitched vs flat roof extension
• Roof cleaning costs
• Is it worth it? Insights