Scaffolding — why it's often a separate cost
Scaffolding is frequently quoted separately from the roofing work itself, priced by roof height, access and how long it's needed. For a small repair some roofers use a tower or ladder instead, but anything involving a full re-roof or significant chimney work usually needs full scaffolding for safety and building regulations reasons.
Thatched roofs — a specialist trade
Thatched roofing is its own specialism, not something a general roofer typically covers — thatch has different fire safety, insurance and maintenance considerations (including regular ridge and ongoing coating work) compared to tiled or slated roofs.
What affects the cost
Cost depends on roof size and pitch (steeper roofs need more scaffolding and take longer), the material (slate costs more than concrete tile), access, and whether the existing roof structure (timbers, felt) needs work too, not just the visible covering. A straightforward repair is quick; a full re-roof including scaffolding commonly takes 1-3 weeks.
Roofing on extensions and new builds
A new roof needs to tie into the existing structure correctly at the junction — a common source of leaks on extensions is poor detailing at exactly this point, not the new roof covering itself. Timing roofing work before internal trades start avoids water damage to work done underneath.
Roofing felt vs breathable membrane
Older roofs often used bituminous felt underneath the tiles, which can perish and needs replacing during a re-roof; modern breathable membrane lasts longer and manages moisture better. If you're having a full re-roof, this underlay is worth confirming as part of the spec, not just the visible tiles.
Signs your roof needs attention
Slipped, cracked or missing tiles, sagging in the roofline, daylight visible through the roof from the loft, and damp patches on ceilings are all signs worth having checked. A few slipped tiles is usually a repair; sagging or widespread wear across the whole roof usually points toward a full re-roof being better value than repeated repairs.
Flat roof vs pitched roof considerations
Flat roofs (felt, GRP fibreglass, or rubber/EPDM) typically need replacing more often than a pitched tiled roof, but repairs are usually quicker and cheaper. A flat roof extension on an older pitched-roof property is common and often uses a different material and roofer specialism than the main roof.
Why roofing work is weather-dependent
Roofers generally can't safely work in high winds, heavy rain, or icy conditions, so scheduled roofing jobs sometimes shift by a few days around bad weather — factor this into timing if you need work finished by a specific date, particularly in autumn/winter.