Complete replacement of an existing flat roof covering. Covers strip out of old system, deck repairs, insulation upgrade, and installation of a new long-life waterproofing system.
Typical cost
£1,200 — £2,700
Typical duration
2-3 days
Scope type
flexible
Typical tasks
Strip existing roof covering to deck
Repair or replace damaged decking boards
Install PIR insulation to current U-value
Apply new GRP, EPDM, or hot melt system
Form all upstands, edges, and outlets
Extras & additional works
Based on a standard single garage flat roof of approximately 20m². Costs may increase if scaffolding is required or if additional structural repairs are needed.
Common questions Stainesai
Factors include the size of the roof, choice of materials, access difficulty, and any necessary structural repairs.
Yes, flat roof replacements must comply with Building Regulations, particularly regarding insulation and thermal performance.
A typical flat roof replacement for a single garage takes about 2-3 days, including time for setting and curing.
Common materials include GRP, EPDM, and hot melt systems, each offering different benefits in terms of durability and cost.
Scaffolding may be required depending on the height and access to the roof, which can increase the overall cost. Always confirm with your tradesperson before work begins.
Ready to post a flat roof replacement job?
Describe what you need. Stainesai structures it into a proper scope. Your first job post is free.