Roofing in Sutton

Flashing is the metal detailing that seals joints — around chimneys, valleys, vents, skylights and wall junctions. These joints move and collect water flow, so flashing fails long before the main covering. If a roofer proposes reusing old flashing on a full replacement, push back.

Yes, over time — moss holds moisture against the surface, lifts tile and shingle edges, and accelerates frost damage. Have it removed by soft washing or manual scraping, never high-pressure washing, which strips granules and forces water under the covering. Zinc or copper strips slow regrowth.

Yes — replacing one slope or section is common after localised storm damage and costs far less than a full reroof. The trade-offs are colour mismatch with weathered existing material and tying new work into old underlayment. It makes most sense when the rest of the roof has meaningful life left.

Access and safety costs (scaffolding, edge protection), roof pitch and height, tear-off vs overlay, material grade, and how honestly hidden deck repair is priced. A low bid that excludes safety equipment and deck contingency isn't cheaper — it's just billed later.

Full replacements commonly require a building permit or regulatory compliance; small like-for-like repairs usually don't. Rules vary by country and municipality, and a legitimate contractor will know and handle the paperwork — treat 'we don't need a permit' on a full reroof as a flag to double-check.

Two separate ones: a manufacturer warranty on materials (often 20-50 years, sometimes conditional on certified installation) and the contractor's own workmanship warranty (5-10 years is respectable). Get both in writing and understand what voids them — foot traffic, unventilated attics and pressure washing are common exclusions.

A typical semi-detached re-roof runs £5,000-£12,000, with the national average around £8,000; large or complex roofs reach £13,000-£20,000+. Per-m² rates of £80-£150 including scaffolding are the usual quoting basis, and slate or clay costs substantially more than concrete tile.

Usually not for like-for-like replacement — but Building Regulations apply once you replace over 25% of the covering, and listed buildings or conservation areas may restrict material changes (e.g. swapping slate for concrete tile). Your roofer or local authority can confirm before work starts.