Cavity drain membranes, tanking and drainage systems that turn damp cellars into dry, usable rooms, designed by Basement Waterproofing Association members. Covering Winchester, Romsey & the New Forest and Portsmouth & Southsea and across Hampshire.
Book a surveyBelow-ground rooms in Hampshire 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.
Cellars in Hampshire's Victorian terraces and period townhouses, particularly in Winchester, Southsea and Southampton, can make excellent rooms once they are properly waterproofed.
Near the Test, Itchen and the Solent, we design systems around higher water tables.
Much of central Hampshire sits on chalk, but the river valleys of the Test, Itchen and Meon have high water tables, and coastal areas around the Solent are low-lying. That brings moisture pressure to cellars and ground floors near rivers and the coast.
Hampshire ranges from Victorian and Edwardian terraces in Portsmouth, Southsea and Southampton to flint and brick cottages, thatched village houses and listed buildings around Winchester, Romsey and the New Forest. Garrison towns such as Aldershot and Farnborough have large numbers of early twentieth-century homes, where original damp proof courses and wall ties are reaching the end of their life.
Historic buildings beside the Itchen, many listed and built with chalk, flint and lime, which need sympathetic, breathable treatments.
Thatched and timber-framed cottages and riverside properties near the Test, where timber decay and flooding feature in our surveys.
Dense Victorian terraces, many converted into flats, on a low-lying island exposed to salt-laden weather.
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 Hampshire 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.
We cover Hampshire from north-east towns such as Farnborough, Fleet and Basingstoke through to Winchester and the south coast. We regularly work in Basingstoke, Portsmouth, Portchester, Aldershot, Alton and Alresford, and throughout Winchester, Basingstoke & Deane, Hart, Rushmoor, East Hampshire and Test Valley.
Towns and areas we cover in Hampshire
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.
We cover Hampshire from Farnborough, Fleet and Basingstoke through Winchester to Portsmouth, Southampton and the New Forest. Call us to confirm availability for your postcode.
Yes. We regularly work on period and listed buildings around Winchester, Romsey and the New Forest, using materials and methods that suit how they were built.
We cover Hampshire from north-east towns such as Farnborough, Fleet and Basingstoke through to Winchester and the south coast. Towns we visit regularly include Basingstoke, Portsmouth, Portchester, Aldershot, Alton, Alresford, Andover and Appleshaw. If yours isn't listed, give us a call and we'll confirm.
Also in Hampshire
Our other specialist services for Hampshire homes, landlords and businesses.
Rising damp, penetrating damp and damp proof courses. Most common around Winchester and Portsmouth & Southsea.
Dry rot, wet rot and woodworm. Most common around Petersfield & Alton and Romsey & the New Forest.
Black mould, streaming windows and ventilation. Most common around Portsmouth & Southsea and Basingstoke.
Pre-purchase and mortgage surveys. Especially worthwhile for older homes around Winchester and Romsey & the New Forest.
Wall tie replacement and crack stitching. Most common around Southampton and Farnborough, Fleet & Aldershot.
Leaks, floods and burst pipes. Most common around Romsey & the New Forest and Portsmouth & Southsea.
Client testimonials
The teams were polite, helpful, and efficient at all works involved. We had a significant amount of plaster taken off the walls and the team did all they could to keep the dust down, even putting up a clever improvised air lock in place to protect the kitchen/food prep area. Following payment, the paperwork and guarantees were forwarded almost immediately.
Live just outside Hampshire? 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.
