Cavity drain membranes, tanking and drainage systems that turn damp cellars into dry, usable rooms, designed by Basement Waterproofing Association members. Covering Twickenham & St Margarets, Teddington & Hampton and Enfield and across Middlesex.
Book a surveyBelow-ground rooms in Middlesex sit against wet ground, so water is pushed into them under pressure through walls, floors and the joints between them.
A standard damp proof course can't deal with that. Whether you want a dry storage cellar or a full conversion into living space, we design and install the right waterproofing system for your building and how you plan to use the room.
Thames-side towns in Middlesex, such as Twickenham, Teddington, Shepperton and Sunbury, sit on gravels with a high water table, so cellars and basements there need waterproofing that can cope with water under pressure.
We design cavity drain systems with reliable drainage for exactly those conditions.
Riverside towns such as Shepperton, Sunbury, Staines, Twickenham and Teddington sit on Thames gravels with a high water table, and parts are in the river's flood plain. That brings damp cellars and moisture pressure to ground floors close to the river.
Much of Middlesex was built up in the 1920s and 1930s, so interwar semis and terraces are everywhere, alongside Victorian terraces in Twickenham, Hounslow and Ealing and older riverside cottages. Interwar cavity walls were often built with mild steel wall ties that are now corroding, and suspended timber floors with blocked air bricks are a frequent cause of rot.
Victorian terraces and riverside homes close to the Thames, where rising damp and high groundwater are common. We carried out damp proofing at St Margarets Station.
Riverside cottages and period homes just across the river from our office, including lock keepers' cottages we have worked on at Teddington.
Large areas of 1930s housing on clay, where wall tie failure and condensation are frequent findings.
For most conversions we recommend a cavity drain membrane (CDM) system. A studded membrane is fixed to the walls and floor, leaving a small air gap that lets any water that gets through the structure drain freely into a perimeter channel and away, usually to a sump pump. Because it manages water rather than trying to hold it back, it copes well with older walls and high water tables.
Where conditions suit, cementitious tanking can be applied directly to sound masonry to create a continuous waterproof barrier. We often combine approaches, for example tanking to light wells and a membrane system in the main room.
We can provide the waterproofing on its own, ready for your builder, or manage the specialist work from survey through to a dry, finished shell. Every system is designed in line with recognised industry standards and comes with a written guarantee.
A PCA-qualified, commission-free surveyor visits your Middlesex property, investigates with calibrated equipment and identifies the cause.
You receive a clear written report explaining what we found and what we recommend, with a fixed quotation and no hidden extras.
Our own trained team carries out the work, protecting your home, keeping dust down and leaving everything clean.
You receive a written guarantee, which can be protected by an Insurance Backed Guarantee for a single premium.
Middlesex is on our doorstep: Twickenham, Teddington, Hampton and Sunbury are just across the river from our Thames Ditton office. We regularly work in Ashford, Ealing, Twickenham, Hampton, Harrow and Wealdstone, and throughout Hounslow, Hillingdon, Harrow, Ealing, Enfield and Spelthorne.
Towns and areas we cover in Middlesex
Find out more about our basement & cellar waterproofing service.
Book a survey
If you’ve noticed any of these issues, arranging a professional survey is the best way to identify the cause and prevent further damage.
Most can. Headroom, access, natural light and the water table all affect what is possible and what the waterproofing needs to do. A survey tells you what is realistic before you commit to plans.
A studded plastic membrane fixed to the walls and floor that creates a drainage gap. Water that gets through the structure runs behind the membrane into a channel and is pumped or drained away, so the room stays dry.
If water can't drain away naturally, yes. Your surveyor will advise. Where a pump is fitted we recommend a backup and regular servicing.
Yes. Our systems carry a written guarantee, which can be protected by an Insurance Backed Guarantee (IBG) for a single premium. We are members of the Basement Waterproofing Association.
Twickenham, Teddington, Hampton and Sunbury are just across the river from our Thames Ditton office, so we can usually offer surveys at short notice.
Yes. We regularly dry and repair flood-affected homes in Shepperton, Sunbury, Staines and Twickenham, and can design waterproofing to help protect below-ground rooms.
Middlesex is on our doorstep: Twickenham, Teddington, Hampton and Sunbury are just across the river from our Thames Ditton office. Towns we visit regularly include Ashford, Ealing, Twickenham, Hampton, Harrow, Wealdstone, West Drayton and Bedfont. If yours isn't listed, give us a call and we'll confirm.
Also in Middlesex
Our other specialist services for Middlesex homes, landlords and businesses.
Rising damp, penetrating damp and damp proof courses. Most common around Teddington & Hampton and Twickenham & St Margarets.
Dry rot, wet rot and woodworm. Most common around Teddington & Hampton and Ealing.
Black mould, streaming windows and ventilation. Most common around Ealing and Hounslow.
Pre-purchase and mortgage surveys. Especially worthwhile for older homes around Teddington & Hampton and Ealing.
Wall tie replacement and crack stitching. Most common around Harrow & Pinner and Enfield.
Leaks, floods and burst pipes. Most common around Twickenham & St Margarets and Teddington & Hampton.
Client testimonials
Tapco have been very helpful, responsive and professional in how they have managed and completed our re-roofing project, within budget and quote. We are very pleased with the result.
Live just outside Middlesex? We cover the neighbouring counties too.
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From our offices in Thames Ditton and Esher, our surveyors cover London and the surrounding counties, providing fast response times for residential and commercial properties alike.
We regularly work with:
Whether your property requires a damp survey, timber inspection or basement waterproofing system, our experienced team is ready to help.
Our certifications reflect our commitment to the highest standards of work and quality.
Why Tapco
Established in 1971
Choosing Tapco HomeDry means choosing a company with a proven history of protecting properties across the South East.
We believe every property deserves an individual assessment. That’s why our recommendations are based on what your building genuinely needs, not unnecessary treatments.
Tapco (Preservation) Ltd is an Introducer Appointed Representative (Financial Services Register No. 423558) of Phoenix Financial Consultants Limited (Phoenix). Phoenix is a credit broker, not a lender. Phoenix is authorised and regulated by the Financial Conduct Authority (FRN: 539195), and offers finance from its panel of lenders. All finance subject to status and credit checks.
