Damp can show up in different ways, and similar-looking symptoms can have very different causes. Choose what you're seeing below, or send ThinkDRY photographs for an initial expert assessment.
Diagnosis first. Treatment where appropriate.
Choose the closest description. These are starting points for a conversation with ThinkDRY, not an automatic diagnosis.
Tide marks, salts, peeling decoration and damaged plaster near skirting level are useful clues. Rising ground moisture is one possibility; raised ground levels, a bridged damp-proof course, leaks and other moisture sources also need consideration.
Show us the whole wall, the affected floor edge and accessible outside ground levels. Tell us about previous DPC work or changes to floors.
A patch that appears or worsens after rain points the investigation towards water entry. Gutters, downpipes, pointing, render, cracks and roof or window junctions may be relevant.
Tell us which wall is affected and how soon it changes after rain. Photograph accessible outside details from ground level.
Explore penetrating dampWet windows, mould in corners or behind furniture and persistent humidity call for a look at indoor moisture, ventilation, heating and cold surfaces. Leaks or rain entry may also need checking.
Show the room as well as the affected area. Tell us when the mould returns and how the room is used. Mould alone is not evidence that DPC injection is needed.
Chimney damp can have several explanations. Rain penetration, flashing, chimney condition, ventilation and moisture-attracting salts from historic use may all be investigation areas.
Tell us whether the fireplace is used or blocked up, where the stain appears and whether rain changes it. A chimney stain should not automatically be treated as rising damp.
Explore damp around chimneysWet below-ground walls, water on the floor, damaged finishes or persistent moisture need their own assessment. Tell us whether there is visible water entry, when it occurs and how you use the space.
Share photographs of the walls, floor junctions and any existing waterproofing. The appropriate approach depends on the construction and water source.
Explore basement & cellar dampDamaged finishes describe what is happening, rather than why. Ground moisture, rain penetration, salts, condensation, plumbing leaks or residual moisture after earlier work can require different responses.
Show us a wider view before removing or covering the evidence. Include when it started, nearby plumbing and any recent repairs or decorating.
Find the likely cause, send photosA HomeBuyer or building survey mentioning damp can leave a sale feeling uncertain. Send the relevant wording and tell us what the buyer, seller or lender needs clarified.
ThinkDRY offers a physical damp survey for £199. The £199 survey fee is deducted from subsequent remedial work carried out by ThinkDRY. Scope, access and any report requirements are agreed before booking.
Enquire to arrange a survey. This does not take payment or confirm an appointment.
Clear photographs and a short description can often help ThinkDRY identify the likely issue or narrow down what may be happening.
You do not need to name the type of damp before contacting us. Tell us what you see; we will help you work out the appropriate next step.
Start with one clear image in our form. Describe the room, when the problem changes, any leaks and previous work. We can discuss further photographs if helpful.
The form accepts one JPG, PNG or WebP up to 5 MB. Avoid including people or personal documents.
Low-level damp, salts and deteriorating plaster can be associated with ground moisture, but other defects can leave similar signs. We look at the pattern alongside the wall construction, existing damp-proof course, ground levels and repair history.
Where the evidence supports rising damp and the wall is suitable, an injected damp-proof course may form part of the solution. Bridging, damaged finishes and drying also need consideration. Injection does not repair leaking gutters or address condensation.
Good advice starts with the property and the information you share. Each step helps decide what is needed next.
The room, the pattern and when it started.
A clear first image, with wider context where useful.
We consider your photographs and description together.
If inspection is needed, we agree its scope and any charge first.
Relate the signs to the building and explain any remaining uncertainty.
Practical advice, further checks or a suitable repair approach.
Recommend work suited to the identified problem.
This page helps you describe the problem. The next step is a conversation with ThinkDRY, with room to ask questions and understand the options.
Customers name one of our technicians in their accounts of ThinkDRY's work and clear explanations. You can discuss your concern with the team by phone or begin with a photograph.
“I found one of our technicians very professional and knowledgeable, he explained everything very clearly”
In his May 2026 review, Alan P describes explanations, aftercare advice and a quotation based on necessary work. These are individual customer experiences.
Based in Thurlstone, South Yorkshire. Share your postcode so we can confirm coverage for your property.
Yes. Peeling paint, salts or staining can occur in different moisture conditions. The wider pattern and building history help distinguish them.
Yes. Clear images and a description can often identify likely issues or narrow down what needs checking next.
Send the exact extract. The £199 buyer/seller physical survey is a separate route for investigating the concern; its fee is deducted from subsequent ThinkDRY remedial work.
No. Bridging, leaks and other moisture sources can produce low-level symptoms. DPC injection needs a suitable diagnosis and wall.
Send a photograph and a few details. Let's work out what your home needs.
Start with the visible symptoms, then compare the relevant explanations and assessment options.
Start with the problem or the recommendation you have received, then explore the relevant service.
Get a free initial photo assessment. Tell us what you’re seeing and we’ll discuss the right next step.
Based in Thurlstone, serving Sheffield and Yorkshire.
Buying or selling? Physical damp surveys cost £199, deducted from subsequent remedial work carried out by ThinkDRY.
Tell us about the damp in your property and we’ll help you understand the next step.
Fields marked * are required. Photographs are optional.
