Damp problems
Penetrating damp investigation
Identify rainwater ingress and penetrating damp from gutters, render, pointing, chimneys and openings before repairs are scoped.
Why diagnosis matters
Treat the cause, then repair the damage
Damp that appears or worsens after rain often points to water entering through the external envelope. We trace likely routes, distinguish them from leaks and condensation, and define the correct repair sequence.
Complimentary survey
Book Your Complimentary Survey
Over 35 years of independent expertise. Written findings included. No sales pressure. No obligation.
Book your complimentary surveyTechnical review
Dan, Director / Surveyor
Last reviewed: July 2026. Advice is general until the property, access and visible evidence have been assessed.
Guarantee & aftercare
Written guarantee terms are matched to qualifying work, with inclusions, exclusions and aftercare explained before acceptance.
What we consider
Possible causes and lookalikes
Overflowing or defective rainwater goods
Cracked render, failed pointing or porous masonry
Chimney, flashing, roof or parapet defects
Cavity obstructions and failed perimeter seals
Inspection method
A clear work sequence
Step 1
Relate symptoms to weather exposure
Step 2
Inspect accessible elevations and rainwater routes
Step 3
Rule out plumbing and internal humidity
Step 4
Prioritise source repair before internal making good
Scope boundaries
Honest about what the work does—and does not—cover
We investigate roofing, rainwater and plumbing routes and carry out roof repairs, re-roofing, flat roofs, chimney-stack work and plumbing leak repairs in-house. Below-ground drainage excavation and structural engineering are referred where they fall outside our direct scope.
Complimentary specialist survey
Your Complimentary Specialist Survey
Backed by over 35 years of independent damp and timber expertise.
We believe in diagnosis before treatment. That's why we offer every homeowner and property manager in Dorset, Hampshire and Wiltshire a complimentary specialist survey — carried out by an experienced specialist, not a salesperson.
Over 400 combined reviews across Google and Checkatrade. Over 35 years protecting Dorset homes.
Common questions
About penetrating damp investigation
Why does my wall become damp after rain?+
Rain-related timing suggests water ingress, but the route may be some distance from the visible patch. Gutters, flashings, pointing, render, openings and cavities all require consideration.
Can blocked gutters cause damp inside?+
Yes. Overflow can saturate masonry or direct water into vulnerable junctions. The gutter fault should be corrected before damaged internal finishes are reinstated.
Will you repair a roof defect?+
Yes. We carry out roof repairs, re-roofing, flat roofs and chimney-stack work in-house. Major structural roof rebuilds are referred to an appropriate specialist where needed.
Is the specialist survey really free?+
Yes — completely. We offer every homeowner and property manager across Dorset, Hampshire and Wiltshire a complimentary specialist survey at no charge. This includes an on-site inspection, written findings, a clear scope of any recommended work, and an honest referral if the problem falls outside what we do. You pay nothing for the survey. You only pay if you commission the remedial work, and you are under no obligation to do so. The reason we do this is straightforward: we believe in diagnosing the problem before recommending a treatment. A proper inspection takes time, and we'd rather invest that time up front than quote a solution before we've understood the cause.
Not sure if this is your problem?
That's exactly what the survey is for. Book your complimentary specialist survey and one of our experienced team will identify the cause on-site, consider the alternatives, and give you written findings — at no charge and with no obligation.
Related services
Continue your investigation
Recent work
Photographed on our own projects
A selection of real jobs from this service, photographed on site across Dorset, Hampshire and Wiltshire.
Reviewed by local homeowners
Trusted across Dorset, Hampshire and Wiltshire
Independent feedback from customers on Google and Checkatrade — alongside over 35 years of damp proofing and plastering experience.
Next step
Claim your complimentary survey before choosing a treatment
Tell us what you can see, when it changes and where the property is. Photographs can help us triage the next step.