DampUK guide library

Browse all damp and leak guides

Find detailed articles on roof and plumbing leaks, damp walls, condensation, rising damp and repair decisions. Use the grouped links to go straight to a relevant question.

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Roof leaks

See all roof leaks guides →
Why is my roof leaking? Why is my roof valley leaking? Can defective lead flashing cause a leak? Can one slipped slate cause a roof leak? Can cracked roof tiles let water in? Why is water coming in around my chimney? Why is my roof window leaking? Why does my roof leak only when windy?

Plumbing and bathroom leaks

See all plumbing and bathroom leaks guides →
How can you tell if a pipe is leaking inside a wall? Why is water coming through the ceiling below the bathroom? Can a shower leak without water on the floor? Why is my ceiling damp below the bath? Why is water appearing around the base of my toilet? Could my central heating system be leaking? How can a leak beneath a concrete floor be found?

Gutters, drainage and rainwater

See all gutters, drainage and rainwater guides →
Why does my gutter overflow in heavy rain? Why is water running behind my gutter? Can a blocked downpipe cause damp? Can a blocked gully flood the house? Can a leaking underground drain cause damp walls? Why is water pooling against my house?

Walls, windows and doors

See all walls, windows and doors guides →
Why is water getting in around my windows? Can defective cavity trays cause damp? Can rain penetrate a cavity wall? Can cracked rendering cause damp? Why does damp form beneath a window? Why is water coming under my external door?

Flat roofs and extensions

See all flat roofs and extensions guides →
Why is my flat roof leaking? Why is water ponding on my flat roof? Can blocked flat roof outlets cause internal flooding? Why does my extension roof leak against the house? Why is water coming through my rooflight? Does a leaking flat roof need replacing?

Condensation and mould

See all condensation and mould guides →
Why are your windows wet every morning? Why is black mould growing in your bedroom? Why does mould return after cleaning? Why is mould worst behind wardrobes? Do trickle vents reduce condensation? Can new double glazing make mould worse?

Rising damp and DPCs

See all rising damp and dpcs guides →
Damp at the bottom of a wall: what could cause it? Is it really rising damp? Can outside paving bridge your damp-proof course? Is a chemical damp-proof course worth the money? Can salt contamination mimic rising damp? Why is damp back after DPC injection?

Surveys, treatments and costs

See all surveys, treatments and costs guides →
Do you really need a damp survey? Can a damp meter tell you where the water came from? How much should a damp survey cost? How to compare damp proofing quotes? Should you get a second opinion on damp? What does a damp-proofing guarantee actually cover?