★★★★★96.1% customer satisfaction · 1,250+ jobs since 2005 · up to 30-year guarantee
20+
Years protecting NE homes
1,250+
Damp jobs quoted since 2005
96.1%
Customer satisfaction
30yr
Guarantee on qualifying work
External Wall Damp explained
What is external wall damp?
External wall damp is caused by defects in the outer fabric of the building — eroded mortar pointing, cracked or blown render, porous brickwork or failed seals — that let wind-driven rain soak through to the inside. The fix is to repair the external defect (repointing, render repair, sealing) and, where exposure is severe, apply a breathable masonry protection cream so the wall sheds water while still being able to dry.
Know the signs
Signs of external wall damp to look for
Spotting it early keeps the repair small. These are the tell-tale signs in North East homes:
Damp patches inside that worsen after driving rain
Crumbling, missing or sandy mortar pointing
Cracked, hollow-sounding or blown render
Spalling (flaking) brick faces and green algae growth
Damp concentrated on the weather-facing elevation
Common causes
Why external wall damp happens
Eroded or failed mortar pointing on exposed walls
Cracked, debonded or inappropriate cement render
Porous or frost-damaged (spalled) brickwork
Missing or defective flashings, copings and seals
Severe weather exposure on North East coastal/exposed elevations
Our proven process
How we treat external wall damp
Diagnosis first, then a lasting, guaranteed fix — never a sticking plaster.
External survey
We inspect the elevations to find every defect letting water in — pointing, render, brick, seals and details.
Repair the fabric
Repointing in the correct mortar, render repair or renewal, brick repairs and resealing as required.
Protect the façade
Where exposure warrants it, a breathable masonry cream is applied so the wall repels rain but still breathes.
Make good & guarantee
Internal damage is made good once the wall is watertight, and qualifying work is guaranteed.
Get rid of external wall damp for good
Book your free, no-obligation survey. We'll confirm the cause, give you a clear fixed price and back the work with up to a 30-year guarantee.
A 96.1% satisfaction rating isn't an accident — it's what happens when local specialists do the job properly, the first time.
★★★★★
“Dean was professional from start to finish and finished ahead of schedule — all backed by a 30-year guarantee. Couldn't recommend them more.”
ST
Sarah T.Newcastle upon Tyne · Verified customer
★★★★★
“Had tide marks creeping up the hallway for years. The survey explained exactly what was wrong and the price was fair. Bone dry now.”
MR
Mark R.Gateshead · Verified customer
★★★★★
“Black mould in the bedroom was making us ill. Honest advice, no scare tactics, sorted in two days. Brilliant local team.”
JP
Joanne P.Sunderland · Verified customer
Your questions, answered
External Wall Damp FAQs
Will repointing stop my damp problem?
If the damp is being driven by failed pointing on an exposed elevation, correct repointing makes a big difference. We diagnose first, because render, brick faces, flashings or seals can also be the culprit — often it's a combination, and we fix them all.
Is masonry waterproofing cream worth it?
On severely exposed North East walls, a quality breathable façade cream is very effective — it repels wind-driven rain while still letting the wall dry, unlike old-fashioned sealants that can trap moisture. We only recommend it where it genuinely helps.
Should I use cement or lime render?
It depends on the property. Older solid-wall and stone buildings often need a breathable lime-based render, whereas hard cement render can trap moisture and crack. We specify the right system for your wall.
Do you guarantee external wall repairs?
Yes — qualifying external repairs and façade protection are covered by a written guarantee.
This is a lead generation website. By submitting your details you are simply being passed to a reputable, independent tradesman.
Any work carried out is paid directly to them, not to North East Damp Proofing.
