Extensions such as garage conversions will usually require extra damp proofing to be added through the conversion, as the existing garage typically has a single skin design for walls and floors, which was not designed to comply with building regulations for habitable rooms. This damp proofing should be put into walls and floors. Furthermore, the roof of the garage conversion will require water proofing. The damp proofing of the floor of the garage conversion will often be performed by utilising a damp proof membrane. This membrane will come in either solid or liquid form. The damp proof membrane will be put down either on top of the pre-existing concrete floor, below the new floor, or as part of both, depending on if the floor will be a solid or a floating floor. In a few garages, the walls have already been damp proofed, but this might have to be improved as part of the conversion to be able to meet current building regulations. The walls will need to be damp proofed to be able to protect the brickwork from rotting gradually as moisture sets in. This can be carried out by either making use of damp proof membranes, waterproof rendering, or cavity insulation, depending on the type of walls that are already present in the garage. Damp proofing is a part of the building regulations that the garage conversion should comply with, therefore is it necessary to make sure that your garage conversion makes use of 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
| Avg. price low | Avg. price low |
|---|---|
| Avg. price | Avg. price |
| Avg. price high | Avg. price high |
£1900
£1425
£950
£475
£0
| Labour cost | £1,050 | |
| Material cost | £375 | |
| Waste removal | £75 |
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Staines-upon-Thames, usually known only as Staines, is a town on the River Thames inside the borough of Spelthorne within Surrey. Formerly it was the historic county of Middlesex. The town modified its formal name from Staines to Staines-upon-Thames in 2012.
Still not had the quote sent to me :-(
Guildford - GU4
Enquiry from: Jay M
Start Date: Immediate
Brick wall crack fixing, damp proof protection. Conservatory door fixing due to the clay soil movement
Slough - SL1
Enquiry from: Richard K
Start Date: Immediate
I need a damp and timber report carried out
Leatherhead - KT22
Enquiry from: Arianna A
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Quote for a 7.6 sqm (82 sq ft) cellar
London - SW20
Enquiry from: Angela S
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We have discovered an issue with property and would like a visit/inspection to identify the cause
Property: terrace
Pinner - HA5
Enquiry from: Kiran M
Start Date: Immediate
Farnborough - GU14
Enquiry from: Peter H
Start Date: Immediate
Our front bedroom has mould above the window, possibly caused by a blocked gutter , which has now been cleared of leaves. however the mould remains and is difficult to eliminate. we need to be rid of
Property: terrace
London - W3
Enquiry from: Chris R
Start Date: Immediate
Front of house approximately 6M fix the damp proofing externally. Red brick 1920s terraced proofing
Ashford - TW15
Enquiry from: Krishna A
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To check whether the wall is damp or not
Pinner - HA5
Enquiry from: Kiran M
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Damp wall in daughter’s bedroom. Find and fix the issue
Harrow - HA3
Enquiry from: Mukund V
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Quotation ***dground Massionnet dampening & condensation & general upgrading for the house
Maidenhead - SL6
Enquiry from: Jennean A
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We have signs of damp in 2 xbedrooms and can't understand why
Epsom - KT19
Enquiry from: Peter M
Start Date: Immediate
We have a small amount of damp rising on a small wall in our conservatory - all the walls were treated with a waterproof membrane and re plaster boarded last year but this small wall was not done
Property: semi detached
Yateley - GU46
Enquiry from: Richard B
Start Date: Immediate
Quote for rising damp in a few rooms at front of house
Farnborough - GU14
Enquiry from: Sinclair P
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One of the flats (flat 17) is suffering with damp within the property. we have completed external repairs to the building and much of the damp appears to have dried out over the summer, however we nee
Epsom - KT17
Enquiry from: Carmel L
Start Date: Immediate
Have some damp around the chimney breast in my dining room
Iver - SL0
Enquiry from: Levina M
Start Date: Immediate
We do not own this house currently; however are imminently exchanging on this property, we are requesting 2 quotes for each of the areas damp has been identified in the survey report. There is unlikel
London - SW17
Enquiry from: Selvi D
Start Date: Immediate
To check damp in loft room and one corner of living room
Epsom - KT18
Enquiry from: James G
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We are experiencing damp in one room and by windows in two other rooms
Iver - SL0
Enquiry from: Sandy V
Start Date: Immediate
Hi, looking for a free quotation for damp treatment. Are you able to visit my property next week on Friday 29/08/25? Pls advise
Walton-on-Thames - KT12
Enquiry from: Tom W
Start Date: Immediate
Damp Survey and Remediation. I can whatsapp photos
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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.
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.
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!
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.
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