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✓ Independent damp & condensation guidance ✓ Cause-before-treatment approach ◎ UK guidance · local help · useful products
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Local professional help

Find the right specialist for the likely cause.

Damp is not one trade. Start with the moisture pattern, then choose the professional route that actually fits the problem.

✓ Diagnosis-first guidance⌖ UK location coverage◎ Service-specific routes£ No invented provider links
Choose the route

What kind of help do you actually need?

Each route explains what the specialist should investigate, what to ask before agreeing work, and which local options are available.

rising damp

Damp proofing

Investigation and remedial work for persistent masonry moisture where damp-proofing may be appropriate.

Ask this firstAsk what evidence supports the diagnosis and whether leaks, bridging and external ground levels have been ruled out.
Local provider link is not configured yet
black mould

Mould inspection & removal

Assessment and remediation where mould growth is significant, recurring or difficult to manage safely.

Ask this firstThe moisture source still needs correcting or mould is likely to return.
Local provider link is not configured yet
penetrating damp

Roof repair

Repair work where moisture patterns point to defects in the roof, flashings, chimney details or other high-level entry routes.

Ask this firstLook for a clear relationship with rainfall and ask the contractor to identify the actual defect before broad replacement work.
Local provider link is not configured yet
penetrating damp

Guttering & rainwater goods

Repair or replacement of gutters, downpipes and rainwater goods where overflow or leakage is wetting walls.

Ask this firstCheck during or after rain for overflow, blocked outlets, leaking joints and staining below the gutter line.
Local provider link is not configured yet
penetrating damp

Repointing & masonry repair

Masonry repairs where failed joints or external defects may be allowing rainwater into the building fabric.

Ask this firstRepointing should address a documented defect; it is not a universal treatment for internal damp.
Local provider link is not configured yet
damp patch

Plastering & making good

Making good damaged finishes after the underlying moisture source has been resolved.

Ask this firstDo not replaster over an active moisture problem and expect the finish alone to solve it.
Local provider link is not configured yet
basement

Basement waterproofing

Specialist systems for below-ground rooms affected by water ingress or persistent ground moisture.

Ask this firstAsk how water will be managed, what drainage or pumping is required, and how maintenance is handled.
Local provider link is not configured yet
condensation

Ventilation

Improved extraction or whole-home ventilation where excess indoor humidity and poor air change are contributing to condensation.

Ask this firstVentilation should be sized and installed for the property rather than used to mask an unresolved leak.
Local provider link is not configured yet
diagnose

Damp survey

Independent investigation where the cause is unclear, symptoms are extensive or remedial work could be costly.

Ask this firstAsk what inspection methods are used, what limitations apply and whether the surveyor also sells the recommended treatment.
Local provider link is not configured yet
Before requesting a quote

Three things that make a better damp inspection.

Good professional help should explain the moisture route, not just name a treatment.

01
Show the patternPhotograph where it starts, how high it reaches and whether it changes after rain, cold weather or room use.
02
Ask for the evidenceWhat observations support the diagnosis, and what alternative causes have been ruled out?
03
Compare written scopeMake sure preparation, repairs, making good, exclusions and follow-up are clear before comparing price.
Still unsure?

Don't choose a trade from the stain alone.

Use DampDeck Diagnose to narrow condensation, rain ingress, plumbing leaks, low-level masonry moisture and other likely routes first.

Diagnose my damp →
Useful before a visit

Collect better evidence.

A hygrometer, photographs and simple notes about timing can make a professional visit more useful. Products are secondary to diagnosis.

Open Shopping Centre →
DampDeck rule

Find the cause. Then find the person.

That is a better starting point than sending every damp problem to the same treatment company.