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Alex Shepherd Roofing
Roofing service

Flat roofs and flat roof repairs

Flat roofs have a bad reputation, and most of it was earned by cheap felt laid badly in the 1970s and 80s. A flat roof built properly with modern materials isn't the liability people assume.

We work on extensions, dormers, garages, porches and bay roofs across East Lancashire and Craven.

Covering
East Lancashire & Craven
Quotes
Free, no pressure
Ring or text
07840 031508

What we do

  • Repairs to splits, blisters, and failed seams and upstands
  • Full replacement in torch-on felt or EPDM rubber
  • New firrings to correct the fall where water is ponding
  • New timber decking where the old has gone soft
  • Lead and flashing detailing where the flat roof meets a wall
  • Conversion to a pitched roof where that makes more sense

Felt or rubber?

Torch-on felt.
Modern high-performance felt is a long way from the old stuff. It's the cheaper of the two, quick to lay, and a properly laid three-layer system gives you a good couple of decades. The joins are the weak point, so it suits simple rectangular roofs better than complicated ones.
EPDM rubber.
A single sheet, often with no joins at all on a domestic roof. Very good in cold weather and very good with movement, which matters on a timber deck that expands and contracts through the year. It costs more than felt and it lasts longer.

On a plain garage roof, felt properly laid is sound value. On anything with upstands, changes of level or pipes coming through, rubber usually earns the difference.

Why flat roofs fail

No fall.
A flat roof should never actually be flat. Without a fall of at least 1 in 80 the water sits, and standing water finds any weakness eventually. Ponding after rain is the sign.
Movement.
Timber decking moves. A covering that can't move with it splits, usually at the joins.
Upstands and edges.
Almost every flat roof leak we find is at an edge, an upstand against a wall, or around a pipe. Very few are in the middle.
Blocked outlets.
A blocked gutter or outlet turns a flat roof into a paddling pool, and the weight alone becomes a problem.
Age.
Old felt goes brittle, cracks and lets go.

Repair or replace?

A split or a failed seam on an otherwise sound roof is a repair, and a reasonable one.

Once you're patching the same roof every year, or the decking underneath has gone soft underfoot, you're paying repeatedly for something that wants doing once. We check the deck by walking it, and by lifting a section if there's any doubt. A soft deck means the covering has been leaking longer than you realised.

Common questions

The things people ask us

Shallow ponding that clears within a day or two is common. Water still sitting there in dry weather means the fall is wrong, and no covering fixes that on its own. It needs new firrings underneath.

Sometimes, and it's cheaper. But it hides whatever the old one was doing and it adds weight. We'd rather strip it and see the deck, and we'll tell you if overlaying is genuinely sensible on your roof.

Properly laid felt gives you a good couple of decades and rubber more, both assuming the fall is right and the outlets stay clear. The fall matters more than the material.

Usually a blocked outlet or an upstand that's fine in light rain and overwhelmed in heavy rain. It's normally a small fix if it's caught before the deck gets wet.

Reviews

What people said about the work

Read the reviews, then ring us and see if we match up.

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