Professional Damp & Timber Survey Reports in Minutes, Not Evenings.

DampApp Pro is built primarily for independent damp and timber surveyors, sole practitioners, and small specialist or remediation firms. It also suits independent surveyors instructed by landlords or housing associations who need a structured, professional report for each property.

Custom defect libraries map to rising damp, penetrating damp, wet rot, and dry rot assessments, giving surveyors structured report clauses they can adapt to the property.

Independent surveyors can create structured, dated damp and mould records when instructed by landlords or housing associations. Awaab's Law currently imposes prescribed timeframes in English social housing, while the Renters' Rights Act 2025 provides for a future private-rented-sector extension. DampApp Pro supports inspection evidence and report preparation; it does not decide whether a legal duty has been met.

The free tier costs £0 forever and needs no account or payment card. You can run full surveys offline, store up to 25 surveys at a time on your device, export professional PDFs with the DampApp Pro watermark, use the core damp and timber records, and try the AI tools. The 25-survey allowance is a storage cap, not a lifetime usage limit: export or delete completed surveys to make room and continue using the app.

Yes. DampApp Pro is fully offline-capable, so surveyors can drop pins, take photos, log defects and export the PDF deep inside basement properties with no cellular signal. Optional Pro cloud sync can resume later.

With a Pro subscription, signed-in surveys capture offline and then sync across your own devices when you reconnect. Cloud sync is a convenience rather than a permanent guaranteed backup, so retain exported reports and follow your own records policy.

DampApp Pro includes an AI Polish module. Free users get a few trial runs to try it out; Pro unlocks a daily allowance through us, and you can add your own Google Gemini or OpenAI/ChatGPT API key for unlimited use. Type shorthand notes on-site and the AI expands them into structured report prose that you review and edit before export.

Yes, DampApp Pro features a sophisticated Internal Air Quality (IAQ) module. Surveyors can input temperature and humidity readings to automatically calculate precise psychrometric data, including specific humidity, vapour pressure, and dew points, natively offline.

Yes. We offer two free online calculators. The U-value & Interstitial Condensation Risk Calculator uses the steady-state Glaser method (ISO 13788 / ISO 6946) with live ERA5 climate data for any location worldwide and produces a professional PDF. The Enhanced Hygrothermal Calculator uses 8,760 hourly ERA5 data points and hygroscopic buffering — more accurate for borderline constructions. Both support multiple elements (wall, roof, floor), US imperial units, and require no login. Find them in the Tools menu above.

DampApp Pro natively integrates the OpenWeather API and RainViewer radar to fetch historical precipitation and atmospheric conditions on the day of the survey. This objective data can be embedded into the final report to substantiate penetrating damp and condensation analyses.

Yes. A Smart Builder engine lets surveyors select custom defect libraries tailored for heritage and commercial properties, adapting the workflow to specialised material degradation, basements, and complex structural decay not found in standard housing.

Yes. It helps landlords and agents create a structured, time-stamped damp and mould record. Awaab's Law currently sets prescribed timeframes for English social housing; the Renters' Rights Act 2025 provides for a future private-rental extension, whose implementation date remains to be confirmed.

Tradespeople and sole traders use DampApp Pro for offline-first reporting, which removes the need to write reports in the evening. Branded PDF output lets them hand a professional report to the client on the day of the survey.

A persistent musty smell is a primary indicator of mould growth or stagnant high moisture. If you also see water droplets on window frames, peeling wallpaper, or bubbling paint, it is likely a condensation failure. DampApp Pro logs temperature and relative humidity (RH), calculates dew points, and generates reports that help diagnose whether the smell is condensation or a structural leak.

Rising damp typically shows a 'tide mark' of salt stains or wet patches from the floor up to about 1 metre on internal plaster, whereas dry rot shows white, cotton-like fungal growth (mycelium) with cracking, crumbling timber. DampApp Pro lets surveyors log moisture profiles, drop timber defect markers, and produce technical remediation reports on-site.