Damp Proofing Specialists in Streatham (SW16)
Professional damp proofing specialists in Streatham, South London.
Why Choose All Well for Damp Proofing in Streatham?
Streatham's housing stock, Edwardian terraces along Streatham Hill, Victorian semis off Leigham Vale, and the 1930s houses around Streatham Common, all carry a high damp risk. The solid-brick Edwardian and Victorian properties were built before modern damp-proof courses existed, and where a slate or bitumen DPC was fitted, it has often deteriorated or been bridged by raised external ground levels over the past century. The 1930s houses in SW16 have cavity walls, but ageing pointing and cracked render on exposed elevations lets penetrating damp in. Damp in these properties doesn't disappear on its own. It gets into the plaster, the joinery, and eventually the structure.
Every project comes with a fixed-price contract, single project manager, and full certification including Building Control sign-off.
Damp Proofing for Streatham Properties
Streatham is known for its edwardian terraces, victorian semis, 1930s houses. Our damp proofing services are tailored to these property types, ensuring results that complement the character of your home.
Postcodes we cover: SW16
Damp Proofing Tip for Streatham Homeowners
If your Streatham property sits on or near Streatham Common, the slightly elevated ground drains better than the surrounding streets, but properties in the lower-lying streets between Streatham Hill and the high street often have external ground levels that have crept up over decades of successive owners laying new paths and patios, which can bridge the existing DPC. Check your external ground level relative to internal floor level before assuming rising damp has another cause.
Rising damp treatment in Streatham's Edwardian and Victorian terraces
Rising damp is the most common damp problem we diagnose across Streatham's older period stock in SW16. We use calibrated moisture meters and thermal imaging to confirm the cause before recommending any treatment. A proper diagnosis means we treat the right thing and don't disturb walls that don't need it.
Chemical DPC injection for Streatham solid-brick walls
The Edwardian terraces along Streatham Hill and the Victorian semis off Leigham Vale are solid-brick construction, with no cavity. Where the original DPC has failed, we inject a silicone-based cream system into the masonry at low pressure, which cures to form a new water-repellent barrier across the full wall thickness. We confirm a fixed price after a free site visit, once we have assessed the wall thickness, the affected area, and whether replastering is needed. Work typically completes in one to two weeks, and the treatment carries a 20-year written guarantee.
Replastering after treatment on Streatham period properties
Once the DPC injection is done, the existing plaster has to come off. It has absorbed salts from the rising damp and will continue to cycle moisture even after the source is stopped. We apply a sand and cement render with a salt-resistant bonding coat before finishing, which prevents salt migration ruining any new decoration. On Streatham's period properties, original cornicing and ceiling roses are protected and retained during this work.
Penetrating damp repairs on Streatham's 1930s houses and Victorian semis
Penetrating damp in SW16 typically comes in through failed pointing, cracked render, or defective flashings, particularly on south-west facing elevations that take the brunt of driving rain. We trace the entry point externally before any internal work starts.
External wall repairs on 1930s Streatham Common properties
The 1930s houses around Streatham Common and Streatham Vale have cavity walls with pebbledash or smooth render finishes. Cracked or delaminating render is the most common entry point for penetrating damp in this stock. We cut out and repoint failed sections, repair or renew render where it has lost its bond, and reseal around window frames and door surrounds where movement has opened gaps. Where internal damage is limited, this external-only approach resolves the problem without major internal disruption.
Tanking for basements and cellar spaces in Streatham Hill properties
A number of the larger Edwardian terraces on Streatham Hill have semi-basement or cellar rooms. Where these take in water through the structure, not just a failed window, tanking with a cementitious slurry or cavity drain membrane is the right solution rather than repeated surface treatments. We assess which system suits the hydrostatic pressure and intended use of the space. Basement tanking carries a 10-year written guarantee.
Damp surveys and guarantees in SW16: what Lambeth buyers need to know
If you are buying a period property in Streatham, a damp survey before exchange gives you accurate information, not a surveyor's boilerplate disclaimer. If you already own the property and are seeing signs of damp, we diagnose the cause and provide a written report with a fixed price confirmed after a free site visit before any work starts.
Guaranteed damp proofing work accepted by Lambeth solicitors and mortgage lenders
Our guarantees are backed by both All Well and the product manufacturer, and we provide a Property Care Association compliant certificate on completion. Solicitors acting on Streatham property sales routinely request this documentation during conveyancing, and mortgage lenders occasionally require it on period properties where damp has been noted in the valuation report. Having a properly documented, guaranteed treatment in place removes a common barrier to sale on Streatham Hill and Leigham Vale properties.
Damp Proofing in Streatham: What's Included
How I price damp proofing in Streatham
I price every damp proofing job in Streathamafter I’ve seen it. No two properties are the same, so a number here would only mislead you. What you get instead is a fixed-price contract, a week-by-week programme, and no costs that turn up later.
Get a fixed quoteWhat Our Customers Say
“All Well managed our project from start to finish. The fixed-price contract meant no surprises, and the result is stunning.”
Verified Customer
Streatham
“Professional team, clear communication throughout. They handled everything including Building Control sign-off.”
Verified Customer
Streatham
Frequently Asked Questions
- How do I know if my Streatham property has rising damp or just condensation?
- Rising damp in Streatham's Edwardian and Victorian terraces typically shows as a tide mark up to about 1 metre high on ground-floor walls, with white salt deposits (efflorescence) and blown or soft plaster at low level. Condensation shows as black mould in corners, on window reveals, and behind furniture, and is most common in kitchens and bathrooms regardless of the floor level. The two problems need different solutions, so we always diagnose with calibrated moisture meters and thermal imaging before recommending any treatment. A moisture reading above 20% at low wall level usually confirms active rising damp.
- Do you guarantee damp proofing work in Streatham?
- Yes. Chemical DPC injection treatments carry a 20-year written guarantee backed by both All Well and the product manufacturer. Basement tanking systems are guaranteed for 10 years. All guarantees cover materials and workmanship, and we provide a Property Care Association compliant certificate on completion, which solicitors and mortgage lenders accept when you come to sell or remortgage.
- Why use All Well for damp proofing in Streatham rather than a national damp-proofing company?
- We work across SW16 and the surrounding South London boroughs, so we know Streatham's housing stock: the solid-brick Edwardian terraces, the 1930s cavity-wall houses around Streatham Common, and the variation between them. We diagnose the cause before recommending a treatment, rather than applying the same solution to every job. Richard runs the work personally, not through subcontracted crews, and the guarantee means we're accountable for the outcome.
All Well has completed 100+ projects across 25 London boroughs since 2020. We are NICEIC approved for electrical work, FENSA registered for glazing, and CHAS certified for site safety, with Public Liability insurance to £5 million. 57+ Google reviews average 4.5 stars. All Well Property Services® is a UK registered trademark, Companies House no. 12721034, operating from Unit 1 Limes Avenue, Anerley SE20 8QR.
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