Free Damp, Mould & Waterproofing Tools
Calculators, diagnostics and checklists that make you a better-informed client before you spend a pound — every one instant, anonymous and genuinely useful.
What free damp tools are available? Ten, all browser-based and gate-free: three cost calculators (damp proofing, basement waterproofing, timber treatment) built on real 2026 North London pricing; three diagnostics (damp type, mould severity, condensation risk) that score your answers against the same patterns surveyors read; and four interactive, printable checklists (homebuyer viewing, landlord Awaab's Law compliance, survey preparation, room-by-room ventilation audit). Each links to the guide behind its logic and the service that acts on its result — and each is honest about where a tool ends and a £280–£450 survey begins.
Cost calculators
Damp Proofing Cost Calculator
Choose your damp type, property and extent — get an instant indicative range built from real 2026 North London pricing. No email, no phone…
Open the toolBasement Waterproofing Cost Estimator
Pick a system, enter your floor area, choose the intended use — and get an instant range aligned with BS 8102 practice and real North…
Open the toolTimber Treatment Cost Estimator
Woodworm, wet rot or dry rot — select the problem and its extent for an instant indicative range, built from real North London treatment…
Open the toolDiagnostic tools
Damp Type Diagnostic Tool
Seven questions about what you can actually see — pattern, height, weather, mould — and a structured first opinion on which damp you're…
Open the toolMould Severity Checker
Six questions — extent, recurrence, concealment, occupants — scored into a severity rating with the proportionate response, from safe…
Open the toolCondensation Risk Calculator
Occupancy, moisture habits, extraction, ventilation, heating — scored into your home's winter condensation risk, with the specific fixes…
Open the toolChecklists
Homebuyer Damp Checklist
Twenty-four checks that turn a nervous viewing into a systematic inspection — exterior, interior, paperwork and the professional steps that…
Open the toolLandlord Damp & Mould Compliance Checklist
The response sequence, the property provision and the paper trail — audited in twenty ticks. Run it per property annually, and the moment…
Open the toolDamp Survey Preparation Checklist
A damp survey costs £280–£450 and two to four hours — preparation is how you extract full value. Access, history, observations, questions:…
Open the toolProperty Ventilation Audit Checklist
Twenty minutes, room by room: test what extracts, what vents, and what's sealed shut — and find exactly where this winter's condensation…
Open the toolHow to get the most from them
The workflow that works: run the tool that matches your situation, read the guide it links (each tool is built on one), then bring both to a professional survey for anything recurring, structural, timber-related or pre-purchase. Informed clients get sharper diagnoses and tighter quotes — these tools exist to make you one.
Free Tools FAQs
Completely: no fees, no sign-up, no email gate, and every calculator, diagnostic and checklist runs entirely in your browser — nothing you enter is sent to our servers. They exist to make you a better-informed client before a single pound is spent.
They use the same 2026 North London ranges published across this site — accurate enough to budget with and to sanity-check quotes against. They estimate; surveys diagnose; written quotations follow surveys.
Yes — ticks store locally in your browser on the device you're using (never transmitted), so you can return to a half-finished audit. Every checklist also prints cleanly for clipboard use.
Symptoms but no diagnosis: the Damp Type Diagnostic. Visible mould: the Mould Severity Checker. Winter condensation worries: the Condensation Risk Calculator or Ventilation Audit. Buying: the Homebuyer Checklist. Letting: the Landlord Compliance Checklist. Budgeting: any of the three cost calculators.
No — and they say so. Tools structure the evidence you can see; a £280–£450 survey establishes mechanism with depth profiling, salts analysis and trained eyes. Use tools to arrive at the survey informed.
Worried about damp, mould or a wet basement?
Speak to us today or book a survey — we'll arrange the right independent specialist for your property.