A flat roof built to drain
Deck assessed first
We check the substrate before covering soft, damp or damaged sections.
Falls and outlets checked
We plan how rain reaches the outlet without sitting across the surface.
Upstands sealed carefully
We pay close attention where the roof meets walls, pipes and roof edges.
Flat roofs depend on the details
A flat roof still needs a controlled fall. Water must reach the outlet instead of settling in low spots and testing every seam. We inspect the deck, edges, upstands and drainage route before planning a flat roof installation or renewal. Splits, failed joints, movement and worn edges can all let moisture reach the layers below. Where stripping is required, we remove defective material, assess the substrate and repair it before laying the waterproof build-up. Sound preparation matters more than a tidy surface hiding a soft deck.
Useful costs and a properly scoped job
Typical flat-roof projects cost £2,000 to £5,000. Size is only one part of the price. Deck condition, drainage, wall junctions, pipes and other penetrations can add work that isn't obvious from below. We form secure perimeter details and seal upstands carefully because these are common routes for water. If the existing roof has local damage but the wider system remains sound, repair may be possible. Where failure is spread across the covering, renewal can provide a more practical answer.
Frequently asked questions
How much does a flat roof project usually cost?
Typical projects cost between £2,000 and £5,000. The final scope depends on roof size, deck condition, drainage, access and the number of junctions or penetrations. We assess these points before setting out the work required.
Does standing water mean the roof must be replaced?
Not by itself, but it can show poor falls, blocked outlets or movement in the deck. We check whether the waterproof covering remains sound and whether drainage can be corrected. Widespread splits or trapped moisture may make renewal more practical.
Can you repair the deck beneath the covering?
Yes. Where the covering is stripped, we can inspect accessible deck sections and replace or repair damaged areas as agreed. A new waterproof layer needs a firm, properly prepared base, so we don't simply hide a weak substrate.