How Do You Find Where a Roof Is Leaking in Redfield?

A stain on the ceiling shows where water arrived, not where it got in. Finding the real opening means following the water back along the timbers and felt, and that takes method.

In a Redfield Victorian terrace, a leak might start at a chimney, a bay roof, a back extension junction or a single slipped tile, and then run a long way before it drips. Treating the stain rather than the source is the commonest reason a leak comes back after a repair.

Record what you see indoors

Before anyone goes near the roof, make notes. Where is the mark, how big is it, and does it grow after rain, in wind or only after a long wet spell? Take dated photographs. A top-floor bedroom, a landing ceiling and the wall beside a chimney breast each point to different suspects, so the pattern matters.

Put a bucket under any drip and keep cloths handy, but leave the roof to us. Also note whether doors, windows or radiators on the same wall feel damp, since water can follow a wall as well as a rafter, and that detail helps us choose where to look first.

How water really travels

Water follows the easiest route. It runs down the underside of tiles, along battens, across the felt and down a rafter before finally soaking through plaster. On a long terrace slope the entry point may be a good distance up the roof from the stain, and sometimes sideways as well.

• Entry point higher up the slope than the stain
• Water running along a timber to a different room
• Stain appearing only in certain wind directions
• Damp that dries out and returns after the next storm

What we check in the loft

If the loft can be reached safely, we look for daylight through the covering, dark or wet timbers and stained felt. Dry timber beside a wet one tells us which way water has gone. Where lofts are tight or boarded over, we work from what can be seen and check the roof from outside as well.

Likely culprits on Victorian terraces

Terraced roofs share a few weak points. We look at the slopes in turn, then at the details around them, because that is where most leaks start. The covering in the middle of a slope is often fine while the joint beside it has failed.

• Lead flashings around chimneys and party walls
• Valleys and gutters where roof planes meet
• Bay window roofs and their junction with the wall
• Rear extension abutments and their flat roofs

Putting it right and checking it worked

Once the source is found, the repair is matched to it: a refixed tile, a renewed flashing, a re-bedded ridge or a patched valley. We explain what was wrong and show you photographs. After the next heavy rain, check the stain from indoors; if it shifts or reappears, tell us and we will look again.

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