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If realising your dream home means improving rather than moving but the options for extending are limited, then one of the most cost-effective ways to create additional living space in your home is to convert your cellar or basement. A converted basement provides optimal floor space and head room, making it suitable for a more flexible range of uses as well as increasing your home’s value.

But although cellars are common in pre-war houses, they were rarely designed to be living spaces, and early building practices meant that most basements didn’t include any form of waterproofing, making them cold, wet and uninviting.


Basements and cellars are susceptible to dampness. Without any form of waterproofing, water passes through the walls and floors into the basement. At worst this could result in flooding, but any damp conditions can lead to mould growth and fungal decay which can be a health hazard.  

Having professional waterproofing as part of your basement or cellar conversion or new building project is a must. Waterproofing a basement ensures the integrity of the structure, and Stonehouse are the UK’s leading suppliers of structural waterproofing services. We offer every kind of basement waterproofing for homeowners, architects, specifiers, contractors or developers and are experts in a wide range of properties from new builds to listed buildings. Our experienced CSSW qualified surveyors are registered Waterproofing Design Experts as recommended by BS8102:2009. For complete peace of mind Stonehouse designs, installs and guarantees
all of our work.

For Type B structures, including roof decks, walls and floors, we can specify Type A internal or external waterproofing systems. We install Internal Type C cavity drain membrane systems with integrated sump and pump systems which are monitored and maintained annually by Stonehouse. A significant proportion of our work is to repair failed basements. We specialise in working with listed buildings, treating the fabric of the properties under our care with utmost respect in in full compliance with building regulations. Our waterproofing technology ties in with protection against radon gas.

Take a look at some of our recent projects to get a flavour of the diversity of the properties we have worked with. Then contact us for a chat about how we can contribute to your building or conversion ambitions.

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