Basement Waterproofing Solutions in Bath


Products Used: Cavity Drain Membrane, Perimeter Drain Channel, Sump Pump Chamber

Nestled in the South West of England within a picturesque village just outside Bath, lies a Georgian family home spread over four floors and made from Cotswold stone. Bath and the surrounding areas are renowned for its Georgian architecture, typical to that of the times the basements were often occupied servant offices. The housekeeper and cook might be given rooms in this area away from the maids who slept in the attic.

The basement for this particular home was dark damp and used as a storage space by all the family, with over 50 years’ experience Timberwise’s basement waterproofing specialist in Bath were tasked to design and install the right basement waterproofing system to create a dry living space with improved lighting that could be used and enjoyed by all the family.

After an initial visit from a Timberwise Waterproofing Design Specialist, Timberwise designed a comprehensive waterproofing system to comply with BS 8102:2009.

What is BS 8102:2009?

This British Standard provides guidance on methods of dealing with and preventing the entry of water from surrounding ground into a building below ground level. 

British Standards Institute Code of Practice for Protection of Below Ground Structures Against Water

The Basement Waterproofing Solution Methodology

The first task was to clear the site of all debris, emptying out years of collected clutter to leave a blank canvas on which to create the perfect dry living space for this family home. After the first contractors laid the concrete flooring, Timberwise technicians hit the ground running, the chosen system was a cavity drain membrane system (otherwise known as Type C waterproofing). A Type C waterproofing solution controls the flow of water within the basement area as opposed to stopping the flow of water.

Cavity Wall Membrane

High-density cavity drain membrane was fixed to the walls using a watertight fix whilst holding the membrane in position. As opposed to traditional tanking that works by holding back the water and pressure a Type C system allow water to penetrate and flow behind the membrane into a perimeter drainage channel which directs the water to a sump pump. A heavy duty cavity drain membrane is used on the floor and joined to the wall membrane with waterproofing tape – effectively creating an envelope of the membrane around the basement.

Perimeter Drainage Channel

The perimeter drainage channel is designed to collect water at the bottom of cavity drain membrane and to intercept water coming in under pressure at the wall floor junction. Ultimately, water is then drained away to a pumped or natural drainage point. By using a perimeter drain channel, it relieves hydrostatic ground-water pressure, helping to create dry, healthy living and storage environments.

Sump Pump

The sump pump unit is at the heart of the waterproofing system, this is where any water within the basement area is channelled to and then pumped away to a convenient drain off point. In this basement, a TripleSafe unit with 3 pumps was used, a complete sump system including primary, secondary and backup pumps meaning the basement will be ready for practically anything which gives the customer ultimate in peace of mind.

With the waterproofing system in place, the other building trades could then play their part in transforming the basement – the electrician, plumber, joiner and plasterer all carried out the finishing touches that complete the basement conversion. The light well area of the basement was enlarged to increase the space within the basement. The area was dug out and prepared and once complete with a handmade wooden frame, the light well will become a feature of the basement.

 It’s great to know this space will remain perfect, that’s until the children decided to make it their playroom. But, then again, is that not what we set out to achieve … a playroom, a cinema… a room enjoyed by all the family.

Charles Edwards, Waterproofing Design Specialist CSSW


With the walls plastered, the oak floor laid and the lighting in place the project is nearing completion. From start to finish the whole project took 6 weeks. With the addition of the final luxury touches, the basement is finished. High-quality solid oak floor, delicate lighting and an advanced audio-visual system combine together to give the basement a real touch of luxury.

Timberwise waterproofing works are carried out to the highest of standards using the best products in the industry and it’s crucial to continual service the waterproofing system. To give the customers confidence in their waterproofing system, Timberwise also included a complimentary post-installation assessment, clean and check. The pump and drainage system is at the heart of the waterproofing system and this assessment is essential to ensure the system is performing effectively and efficiently.

Timberwise is one of the few companies within the industry who proactively include this free post installation check.  From experience, Timberwise knows that it is an essential part of the whole installation and on-going waterproofing process and they believe this is an important duty of care to customers to do this.

Contact Our Waterproofing Specialists in Bath

All our waterproofing solutions also benefit from our design and installation services along with our long-term insurance backed guarantees ensuring you have complete peace of mind that the customer’s basement will remain dry for years to come. As the leading experts in the South West you can trust that our basement waterproofing in Bath will provide you with the right waterproofing systems to solve your damp basement problem. Don’t hesitate to contact Timberwise via our form above, by calling on 0800 288 8660 or you can request a survey online.