Extensions including garage conversions will often require supplementary damp proofing to be added as part of conversion, as the pre-existing garage routinely has a single skin design for walls and floors, which was not manufactured to comply with building regulations for habitable rooms. This damp proofing will have to be added to walls and floors. Additionally, the roof of the garage conversion will require water proofing. The damp proofing of the floor of the garage conversion will in most cases be performed by employing a damp proof membrane. This membrane is available in either solid or liquid form. The damp proof membrane will be put down either on top of the existing concrete floor, underneath the new floor, or as part of both, depending on whether the floor will be a solid or a floating floor. In some garages, the walls have been damp proofed, but this may have to be updated as part of the conversion in order to meet current building regulations. The walls should be damp proofed to be able to protect the brickwork from rotting slowly as moisture sets in. This can be accomplished by either using damp proof membranes, waterproof rendering, or cavity insulation, depending on the type of walls already present in the garage. Damp proofing is an integral part of the building regulations that the garage conversion should comply with, therefore is it necessary to ensure that your garage conversion employs suitable damp proofing methods.
The average cost of Damp proofing is £1500. Costs vary based upon the materials and the organisation selected. The upper price range can be as high as £1725. The material costs are in general about £375
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| Avg. price | Avg. price |
| Avg. price high | Avg. price high |
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£2250
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| Labour cost | £1,050 | |
| Material cost | £375 | |
| Waste removal | £75 |
Requests for quotations in South East in April 2025
Requests for Damp proofing quotations in South East in April 2025. 0% change from March 2025.
Requests for Damp proofing quotations in United Kingdom in April 2025. 0% change from March 2025.
Hello and welcome to my page. We are a Family run building business with over 20 years in the building industry. We offer a verity of services this includes: Damp proofing specialists, Bricklaying Landscaping Groundwork’s/ drainage Roof repairs Poi...
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The Hive Efficiency Group supply and install a range of products to both residential and commercial properties, designed to assist in making them more energy efficient and maintenance free for many years to come. From thermally effiecient wall c...
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Still not had the quote sent to me :-(
Eastbourne - BN22
Enquiry from: Fotik M
Start Date: Immediate
There is black/green mould in two of the bedrooms of my property - ceiling, walls, wardrobe, mattress, some clothing. There is a little mould by the window in the living room and kitchen and bathroom ...
Weybridge - KT13
Enquiry from: Donna M
Start Date: Immediate
Small patch in the kitchen
Camberley - GU16
Enquiry from: Samia M
Start Date: Immediate
I’m in the process of purchasing a property in Camberley (GU16) and a recent survey has identified signs of damp in multiple areas, including the family room wall and chimney masonry within the roof...
Farnborough - GU14
Enquiry from: Elaine K
Start Date: Immediate
Potential property purchase, survey completed (level 2). Survey indicated high damp reading and some sub floor concerns. I am looking for works to be quoted on to identify the level of works required ...
Oxford - OX4
Enquiry from: Daisy G
Start Date: Immediate
Good afternoon, I recently had a survey done by an independent damp specialist to work out the cause(s) of damp in a Victorian terraced property I am purchasing in East Oxford. Given I have alre...
Buckingham - MK18
Enquiry from: Rebecca C
Start Date: Immediate
Rising damp in old cottage house.
Milton Keynes - MK8
Enquiry from: David K
Start Date: Immediate
We have a growing damp spot along in one of our bedrooms, this room is directly below a balcony area on the top floor ov our house. Suspect that water is leaking in via the balcony into the wall and c...
Chichester - PO20
Enquiry from: Gina F
Start Date: Immediate
Surveyor has detected damp in the living room and between the garage(part of an extension)
Banbury - OX16
Enquiry from: Linh T
Start Date: Immediate
We suspect a damp wall in the back of the house. Can you visit and give us a quote?
Maidenhead - SL6
Enquiry from: Philippa I
Start Date: Immediate
I have a problem which I believe could be a failed damp proof course- The property is ground floor and the walls are wet in the bedroom to the outside wall and skirting board soft. There is an Atmos...
Aylesbury - HP18
Enquiry from: Alex C
Start Date: Immediate
I have a cottage that was built pre 1900 that is semi detached. My internal wall that is in between my neighbour and I has always suffered from damp, we have had the property 13 years and it’s alwa...
Eastleigh - SO50
Enquiry from: Rebecca W
Start Date: Immediate
I am looking to purchase this property but have been advised by a Building Surveyor that it has damp in the party wall and three external walls. I would need the owners permission to enable access. It...
High Wycombe - HP13
Enquiry from: Razia I
Start Date: Immediate
Riding damp inside living room wall
Deal - CT14
Enquiry from: Jayne C
Start Date: Immediate
Older style 1920s house?? Terrorist tampon front windowsill down to floor outside and inside rest of house is okay I have videos and photos House is tenanted. I am the landlord.
Guildford - GU2
Enquiry from: Neil M
Start Date: Immediate
We think we have damp in our kitchen floor. Please advise on what treatment we may need.
Milton Keynes - MK4
Enquiry from: Gabby D
Start Date: Immediate
Hello, I have a first floor window that is letting in some water. The window itself is in good condition, the water is seeping in around the side when the window joins the wall. The access to the prop...
Dover - CT17
Enquiry from: Carmel O
Start Date: Immediate
Penetrating damp survey.in kitchen upstairs bedroom.
Bicester - OX26
Enquiry from: Lisa M
Start Date: Immediate
think have rising damp which needs looking at
Gravesend - DA12
Enquiry from: Samantha S
Start Date: Immediate
Rising damp in one room, basement.
Dartford - DA1
Enquiry from: Moji L
Start Date: Immediate
There was a water leak from the first floor to the neighbours flat. It causes damp on the ceiling and on the wall. The survey has been done and just looking for someone to do the work.
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Signs of rising damp tend to be close to the ground, usually no higher than a metre. It usually works its way up walls in horizontal lines. Penetrating damp usually develops in patches and can often be much higher up. For more advice, speak to a damp proofing professional.
Damp is a serious problem, particularly if you live in an old property, because it can lead to structural damage. This will cost you big money and could be very dangerous, to yourself and the property. Take damp seriously and get it inspected and resolved as soon as you discover it!
You should make sure that all signs of damp have gone before you redecorate your walls. If you want to paint your walls with a water-permeable emulsion paint, you can usually do this after 1 or 2 months. For other types of decoration you should wait longer.
There are a few visible signs of damp, although it often goes undetected. However, in older or empty properties, this made become detectable through its smell. These include peeling paint and wallpaper, crumbling plaster, mould growth, black spots or spores on walls and ceilings, and rotting skirting boards and flooring.
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