Cavity walls are designed to prevent water from penetrating the internal walls of your home. The air space between the inner and outer walls allows any water that does get in to drain down to the footings.

Cavity walls are designed to prevent water from penetrating the internal walls of your home

House Cavity Wall Cleaning Clearing Winchester Hampshire

Cavity Wall Cleaning Clearing

Cavity walls are designed to prevent water from penetrating the internal walls of your home. The air space between the inner and outer walls allows any water that does get in to drain down to the footings. However, for this to work the cavity must be completely clear. If the cavity is not clear it can't function as intended.

The results of a blocked cavity wall are moisture being trapped and bridged from the outer and inner wall resulting in internal damp. From experience, this process is usually helped along by a previous poor cement repoint or old and missing mortar to the outer skin brickwork. You could also add high ground levels and a lack of functioning air bricks and many other factors to this but this page is about cleaning cavities.

Cavity wall cleaning may sound dramatic but actually it's a lot simpler and easier than it sounds. More importantly, it's a lot less costly than some modern magic damp proofing.


How a cavity wall may be blocked

The cavity may become blocked because:

  • It was not cleared correctly when the house was constructed
  • Old lime internal mortar has come away and built up over time
  • Debris has got in during building repairs or modifications
  • You have a nice tree that has grown into the wall...
  • Insulation has dropped below DPC

All the above can form a bridge that carries moisture across to the interior of the house, which in time will cause penetrating damp and mould.

Cavity wall cleaning and clearing process

  1. We carefully remove bricks to gain good access to the cavity.
  2. A camera is inserted in the cavity and used to inspect the condition.
  3. If required the cavity will be cleared 150mm below the DPC
  4. The cavity will be cleared by means of a dust extractor and manual removal.
  5. Once cleared the bricks will be carefully replaced and finished with the appropriate mortar.
  6. We responsibly dispose of the removed matter.

View Our Recent Projects

Whatever the size of your project we are happy to offer a free site survey and no obligation quote at your convenience.


Our Testimonials

Dave’s passion and care for what he does is inspiring. He has helped transform the appearance of our house, lovingly restoring a huge amount of brickwork, while being careful to ensure it is authentic and sensitive. It feels like the work he has undertaken will stand the test of time for another 112 years.

Ben P, Winchester

Edwardian House

I was very impressed by the specialist knowledge and advice received from Build Bright while looking into traditional lime mortar repairs for my Grade 2 listed property in Romsey, it was head and shoulders above any other company I’d approached. The job was completed on time, on budget, and I’m very happy with the result.

P Heslop, Romsey

Grade 2 listed mid terrace

Dave did a great job repointing and repairing a section of our 1850s brick and flint cottage. From the outset he was diligent and professional. He gave us an honest quote, advising on where work was needed and where it was not. The final product was exactly what we hoped for with the colour and texture of his lime mortar carefully integrated into the original work. He will be our first choice for any future repairs.

R Byfield, Wherwell

1850s brick & flint cottage

I can honestly say, I have never seen such a transformation of a house, it is absolutely fantastic and most definitely exceeded my expectations. The conservation committee have also endorsed the work that has been completed, they have suggested it is used as an example to other residents in the conservation estate. I have no hesitation in recommending the work of Build Bright, he completed, on time, in budget and the results were far above my own expectation, I cant thank him enough.

L Mason, Southampton

1931 Period Property

I was really impressed with Dave’s craftsmanship, he truly has a passion for his work. He took his time and care over our house, even spending time making sure the lime mortar colour matched what was there already. Dave was incredibly tidy and always kept us informed. I would definitely recommend him.

A Cooper, Winchester

Victorian house

Build Bright did a fantastic job of rebuilding and repointing the brickwork under our bay window, which had been left in very poor condition with earlier repair works using cement. Build Bright went above and beyond in restoring the front of our house to its former glory, using colour-matched lime mortar and sourcing victorian bricks. Friendly, professional service with amazing attention to detail. We couldn’t be happier with the work, thank you!

L Jacobs, Winchester

Victorian terraced house

Build Bright gave my lovely old house some much needed love. From clearing the cavity's to the repointing all the work was carried out with care. We look forward to welcoming them back in 2018 for further planned repair work.

B Heywood, Eastleigh

Victorian terraced house

Build Bright's sympathetic repointing of our 1910 semi was done with care and attention to detail. The work was exactly what was agreed upon and the site was left clean and tidy. We are very happy that they are returning to do further repairs this year.

J Phippen, Romsey

Edwardian terraced house

I am delighted with the work that Dave did for me, re-pointing the rear of our Victorian house. His attention to detail, method of working & friendly approach has guaranteed him more work in the future. I have no reservations in recommending Build Bright.

D McNally, Winchester

Victorian terraced house

Who we are

Build Bright is fully insured and has over 30 years of experience within the building industry. We cover Winchester, Alresford, Twyford, Southampton, Romsey Hampshire.

Get in Touch

Build Bright

07748 774430

Email Us


Our Location

Build Bright
13 North Hill Close
Andover Road
SO22 6PE