Weather-triggered risk alerts for your rental portfolio
We email you the moment weather data says a property in your portfolio is at risk of subsidence, damp/mould, frozen pipes, or flooding — so you can act while it's still weather data, not a claim.
Free to add every property in your portfolio. No card required.
Subsidence watch — 12 Elm Street
Soil moisture deficit has crossed this property's calibrated subsidence-risk threshold.
Detected 14 August 2026 · Soil moisture deficit: 142mm · Sent by email
What's at stake
This isn't about getting an email. It's about what that email saves you.
Money
Cheaper to catch this as weather than as a claim
The average UK subsidence settlement hit £17,820 in early 2026 — a record. Frozen pipes and flood damage aren't far behind. None of that gets cheaper by finding out about it later.
Time
One account, every property, checked daily
You can't watch the forecast and the Environment Agency's flood warnings for every postcode in a portfolio by hand. This does it for every property on your account, every day, and stays quiet until there's something to say.
Liability
Evidence before you need it
Damp/mould regulation is tightening. Insurers expect 'reasonable care' on empty properties. Tenant disputes usually come down to whose account of events is better documented. A dated monitoring history covers all three, and it's already in place by the time any of them become urgent.
Four risks, one threshold-based trigger each
Each one only fires when its own line in the weather data gets crossed. None of them run on a calendar.
Subsidence watch
Fires when soil moisture deficit crosses a threshold calibrated per postcode against 51 years of UK weather, not one flat number for the whole country.
Average claim: £17,820 (ABI, Q1 2026)
Read moreDamp & mould watch
Fires on sustained elevated humidity, anchored to BS 5250, the UK's own code of practice for condensation control.
Awaab's Law is expected to extend to private landlords
Read moreFreeze risk
Fires when a hard frost is forecast at a property you've flagged vacant — exactly the combination that leads to burst pipes.
Insurers expect 'reasonable care' on empty properties
Read moreFlood risk
Fires on an active Environment Agency flood alert or warning near the property. England & Wales.
One of the UK's costliest home insurance claim categories
Read moreHow it works
Step 1
Add a property
Postcode, a few self-reported details (clay soil, mature trees, vacancy, past claims), done in about a minute.
Step 2
We watch the weather, every day
Soil moisture, humidity, frost forecasts, and live flood warnings for that exact location, checked every day. You don't have to remember to look.
Step 3
You get an email when it matters
Only when a threshold's actually crossed. No daily digests, no filler.
Built on evidence
Every threshold behind these alerts was checked against independent UK data before we trusted it. The full methodology is below, including where the evidence is strong and where it's thinner.
51 years, 10 locations
Subsidence thresholds backtested against UK weather 1975–2025, checked against known insurer-reported drought years.
Zero false positives
Against every known UK-wide wet year in the backtest, at every one of the 10 locations tested.
BS 5250-anchored
Damp/mould threshold anchored to the UK's own condensation-control code of practice, not a rule-of-thumb guess.
Turn monitoring into evidence
The Property Risk Report turns that monitoring history into a dated, sourced PDF — built for insurance renewals, claims, and tenant disputes.
Questions people ask
Is it really free?+
Yes. Alerts are free for every property you add, no card required. The Property Risk Report (the on-demand PDF for insurance renewals or tenant disputes) is a separate product we'll eventually charge for — it's free while we're in early access.
What triggers an alert?+
A real threshold in the weather data getting crossed. Never a fixed schedule, never a generic reminder. Subsidence watch fires on soil moisture deficit crossing a per-location threshold calibrated against 51 years of UK weather. Damp/mould watch fires on sustained high humidity anchored to BS 5250. Freeze risk fires on a forecast hard frost at a property flagged vacant. Flood risk fires on an active Environment Agency alert or warning near the property.
How is this different from checking a general weather app?+
A weather app tells you today's forecast. We watch four specific, insurance-relevant conditions continuously, and only email when one of them crosses a threshold we've checked against real UK weather history. The how it works page has the full methodology, warts and all.
Can I monitor more than one property?+
Yes — add every property in your portfolio to one account. Each property gets its own postcode, its own self-reported context (clay soil, mature trees, vacancy, past claims), and its own alert history.
Do you cover Scotland and Northern Ireland?+
Subsidence, damp/mould, and freeze risk work UK-wide. Flood risk doesn't — it's built on Environment Agency data, which only covers England & Wales, so a property in Scotland or Northern Ireland just won't ever see a flood alert.
What's in the Property Risk Report?+
A dated, sourced PDF of everything we've detected for a property: every subsidence, damp/mould, freeze, and flood event, with dates and the underlying reading. Built for insurance renewals, claims, and tenant disputes, where 'I remember it being damp' is a lot weaker than a dated record.
How is my data handled?+
Your email is encrypted at rest and never sold or shared for marketing. Every email includes a link to pause alerts or permanently delete your data — no login needed. Full detail on the privacy policy.
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