L-Shaped Extension Roof, Lincoln
A patched, mossy felt roof over an L-shaped rear extension in Lincoln, replaced with dark grey Fatra single ply and black edge trims all round.
- Client
- Private client
- Location
- Lincoln
- System
- Fatra single ply
- Area
- L-shaped extension
The same roof, before and after
The Challenge
Our before photos, taken on 5 March 2025, show a roof that had been patched for years. The grey mineral felt was worn through in places, with moss and staining across the surface and dark patches where repairs had been laid over the top. A different, darker felt covered the other wing of the L, so the roof was two materials meeting at the corner. An L-shaped roof is more work than its size suggests. The corner, the joins to the house wall and the long run of open edge are where water gets in first, and where a patched felt roof usually gives up.
Our Solution
Every replacement we do starts the same way: the old roof comes off, the deck underneath is checked and any soft boards are replaced, and the waste is bagged and taken away. Then the new roof goes on as one system instead of two. Here that meant dark grey Fatra single ply across both wings of the L, turned up the house walls as upstands, with black edge trims round every open edge so rainwater drips clear of the brickwork.
The Outcome
One roof instead of a patchwork. The after photos, taken on 22 March 2025, show a single dark grey surface over the whole L, with crisp black edges and no old laps left to lift. From the windows above, it now looks like part of the house rather than a run of repairs.
When patching stops making sense
Patches on a felt roof are a sign the felt itself has reached the end. Each one fixes a single leak, but the felt around it keeps ageing, and after a few years you are paying for repairs on a roof that needs replacing. Our guide to flat roofs in winter, and when to replace one covers the signs, and flat roof replacement explains how we do it.
For a price on a roof like this one, the online estimator gives you a range in a couple of minutes. If you already have other quotes, our quote checklist shows what to compare.
The job, in photos
Other work we’re proud of
Flat Roof Replacement, Sleaford
A worn felt roof in Sleaford, boxed in by brickwork and white cladding and covered in loose chippings and moss, replaced with grey Fatra single ply.
Flat Roof Replacement, Helpringham
A mossy felt roof in Helpringham, between a rendered wall and a clay pantile roof, replaced with grey Fatra single ply finished neatly up to both.
Failed Fibreglass Extension Roof, Rotherham
A failed fibreglass (GRP) extension roof in Rotherham, overlaid in light grey Fatra single ply: bare boards at 8.28 am, finished by 1.21 pm.
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