Buying Guide
How to Stop Damp in a Rented House UK — Complete Guide
Updated June 2026
Damp in a rented house is stressful, frustrating, and potentially dangerous to your health. You cannot rip out walls or install new ventilation — but you can take control with affordable products that manage moisture, remove mould, and protect your belongings. This guide covers everything: what you can fix yourself, what your landlord must fix, and how to document the problem if they refuse.
Quick answer
Our top pick: 3-step renter's plan
From £10 on Amazon
3 immediate steps: (1) measure humidity with a hygrometer (£10); (2) if above 60% RH, get a portable dehumidifier (£85–£200); (3) report to your landlord in writing with photos and humidity readings. All products are renter-friendly — no drilling, no permanent changes, take them when you move.
Check Price on Amazon →Types of damp in UK rentals
- Condensation damp — the most common type. Warm moist air hitting cold surfaces. You can manage this yourself with the kit below.
- Rising damp — moisture pulled up from the ground through walls. Structural problem. Your landlord's responsibility.
- Penetrating damp — water leaking in through walls or roof. Always your landlord's responsibility.
If water is coming through walls or up from the floor, this is your landlord's problem. Report it immediately in writing.
What you can fix yourself (condensation damp)
ThermoPro TP50 Hygrometer
Above 60% RH = mould risk. Below that you may not need a dehumidifier. Measure first, then decide what to buy.
Pros
- Tells you the actual humidity in each room
- Evidence for landlord disputes
- Tiny, takes it with you when you move
Cons
- Needs AAA battery
Who it's for: Every renter — start here before buying anything else
Check Price on Amazon UK →Devola 12L Low Energy Dehumidifier
The single most effective £100 you can spend in a damp rental. Pull moisture out of the air, stop window condensation, prevent mould.
Pros
- Which? Best Buy
- Less than 5p/hour to run
- 12L/day — handles a 1–2 bed flat
- Portable, no install
Cons
- No HEPA filter
Who it's for: Most renters with condensation issues
Check Price on Amazon UK →Open trickle vents, run extractor fans, open windows
The cheapest fix is the one you already have. UK windows have trickle vents that most tenants don't realise can be opened. Use them.
Pros
- Open trickle vents on windows (most have them)
- Run extractor fans for 10 min after every shower
- Open windows 10 minutes daily, even in winter
Cons
- Costs some heat
Who it's for: Every renter — costs nothing
Check Price on Amazon UK →Tapel Self-Adhesive Draught Strip
Cold draughts create cold surfaces — and cold surfaces are where condensation forms. Sealing gaps cuts both heat loss and damp.
Pros
- Peel-and-stick — no tools
- Removes cleanly when you leave
- Cuts cold-spot condensation
Cons
- Disposable
Who it's for: Sealing draughty door and window frames in rentals
Check Price on Amazon UK →FuKuEn Window Condensation Absorber Strips
Stick along the bottom of the window. Soaks up runoff before it pools on the sill and rots the frame (which would cost you your deposit).
Pros
- Stops sill mould
- Cheap and tenant-safe
- Replace every 4–6 weeks
Cons
- Cosmetic — won't fix the underlying humidity
Who it's for: Bedrooms with overnight window condensation
Check Price on Amazon UK →ANSIO Dehumidifier Bags 12-Pack
Wardrobes hide damp until clothes go mouldy. Hang one of these in each wardrobe to absorb the trapped moisture.
Pros
- One per wardrobe
- Stops musty clothes smell
- Hangs from rail — no install
Cons
- Replace every 4–6 weeks
Who it's for: Every wardrobe against an external wall
Check Price on Amazon UK →HG Mould Spray
Spray, wait 30 minutes, wipe. See our full mould removal guide for renters for the safe step-by-step process.
Pros
- Works on grout, paint, sealant
- No scrubbing
- Lab-strength bleach formula
Cons
- Strong fumes — ventilate while using
Who it's for: Bathrooms, bedroom corners, window reveals
Check Price on Amazon UK →What your landlord must fix
- Rising damp and penetrating damp
- Structural ventilation (air bricks, vents)
- Broken extractor fans in bathroom and kitchen
- Damaged windows, frames or seals
- Roof leaks, gutter overflow, missing pointing
How to document damp for your landlord
- Monthly photos of affected walls, with date stamps
- Daily hygrometer readings for at least 2 weeks
- Written report sent by email (creates a timestamped record)
- GP letter if your health is affected (especially for children or asthma)
- Free council inspection — your local environmental health team will visit and assess
Renter-friendly products that travel with you
Everything below removes cleanly when you move out
| Product | Price | What it does | Take when you move? |
|---|---|---|---|
| Hygrometer | £10 | Measures humidity | Yes |
| Dehumidifier | £85–£200 | Removes moisture | Yes |
| Mould spray | £6 | Kills mould | Yes |
| Draught strips | £5–£7 | Seals gaps | Peel off cleanly |
| Window absorber strips | £5–£8 | Absorbs condensation | Peel off |
| Dehumidifier bags | £10–£14 | Protects wardrobes | Yes |
| Thermal curtains | £18–£28 | Insulates windows | Yes |
Frequently asked questions
Bundle
The Renter's Complete Damp-Fighting Kit — Under £150
- ThermoPro TP50 hygrometer£10Amazon →
- Devola 12L dehumidifier£95Amazon →
- HG Mould Spray£6Amazon →
- Tapel draught strip£6Amazon →
- ANSIO wardrobe bags 12-pack£12Amazon →
- FuKuEn window absorber strips£6Amazon →