Extensions including garage conversions will often require supplementary damp proofing to be installed as part of conversion, as the existing garage typically has a single skin design for walls and floors, which was not designed to be in accordance with building regulations for habitable rooms. This damp proofing will have to be put into walls and floors. Moreover, the roof of the garage conversion will need water proofing. The damp proofing for the floor of the garage conversion will often be achieved by utilising a damp proof membrane. This membrane can come in either solid or liquid form. The damp proof membrane will be placed down either on top of the pre-existing concrete floor, below 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 improved as part of the conversion in order to adhere to current building regulations. The walls should be damp proofed in order to safeguard the brickwork from rotting slowly as moisture sets in. This is performed by either employing 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 adhere to, therefore is it vital to ensure that your garage conversion makes use of appropriate 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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| Labour cost | £1,050 | |
| Material cost | £375 | |
| Waste removal | £75 |
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At Home Energy Save GB Ltd we are specialists in all fields of damp proofing and energy efficiency within the home. Whether your problem is loft condensation, rising damp, penetrating damp, black mould or simply heat loss then we can help. We sp...
Phone consultant was lovely and polite. Barry came out to review our home and was very professional, friendly and gave ...
We are a company that specialises in Damp Proofing & Insulation. We have a 100% success rate in resolving damp issues connected to any form of damp. We can also offer the latest solutions to condensation. We offer a FREE, NO OBLIGATION damp ...
will be in touch once property has been purchased.
Welcome to Heatseal Insulation Ltd We are National Loft insulation and Damp Proofing specialists covering most of the UK. Our objective is to provide an outstanding & reliable service to all our customers offering the latest technology to the Dome...
Good advice, clear understanding of the problem and solution
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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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
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I need a damp and timber report carried out
Thatcham - RG18
Enquiry from: Bobby D
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Type C system needed for a 6m basement wall
Farnborough - GU14
Enquiry from: Peter H
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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
Ashford - TW15
Enquiry from: Krishna A
Start Date: Immediate
To check whether the wall is damp or not
Marlow - SL7
Enquiry from: Simon M
Start Date: Immediate
Would like a free damp inspection please
Maidenhead - SL6
Enquiry from: Jennean A
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We have signs of damp in 2 xbedrooms and can't understand why
Hungerford - RG17
Enquiry from: Chris G
Start Date: Immediate
Damp proofing
Yateley - GU46
Enquiry from: Richard B
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Quote for rising damp in a few rooms at front of house
Fleet - GU51
Enquiry from: Alison F
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The skirting board underneath our patio door is damp, we don’t know whether just replacing the door would solve the problem or it could be another problem
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
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
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
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Damp Survey and Remediation. I can whatsapp photos
Ascot - SL5
Enquiry from: Arran G
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Marlow - SL7
Enquiry from: Peter N
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Small Cottage, 1/2 walls showing damp survey to all house
Weybridge - KT13
Enquiry from: Donna M
Start Date: Immediate
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
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
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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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