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Damp corner in home

The head office of BWT Southern is located in Portsmouth. For over 23 years we have been providing accurate damp assessments and effective treatments for homes and businesses throughout the area. If you think your property is suffering from rising damp or mildew, get in touch with us today.

 Professional damp   proofing services in   Portsmouth 

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Expert damp treatments

BWT Southern specialises in locating and removing damp affected areas in homes and business properties.


If your home or business has rising damp or wet or dry rot, contact BWT Southern. We can provide an expert damp assessment and effective treatments.

Waterproofing servic

Don’t know what to do with your underground areas? We can transform your basement into a clean, dry, and usable room with our waterproofing services.

Local authority approved

BWT Southern is fully accredited and approved by all relevant local authorities. All work comes with an insurance guarantee with GPI for your peace of mind.


We are proud of our reputation for quality workmanship and effective treatments against damp. We have been offering quality work for more 23 years.

Portsmouth’s damp treatment specialists

BWT Southern is a leading damp company in Portsmouth. We can provide you with effective damp treatment, woodworm treatments, waterproofing and wall tie replacement services. Our offices are located in Portsmouth, Guildford, Salisbury and Bishop’s Waltham and our team operates throughout Hampshire, Surrey, Sussex, Wiltshire, Chichester, Farnham, Haslemere and Winchester.

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wall tie on brick wall

Customer testimonials

"Good clean service. Arrived on the day and on time, felt confident that you were getting the job done properly."

Damp course, installation of chemical damp proof course.
Customer in Fareham

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