Extensions including garage conversions will usually require extra damp proofing to be added during the conversion, as the pre-existing garage will typically have 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 added to walls and floors. Furthermore, the roof of the garage conversion will need water proofing. The damp proofing for the floor of the garage conversion will usually be achieved 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 a few garages, the walls will have already been damp proofed, but this might need to be updated as part of the conversion to be able to adhere to current building regulations. The walls will need to be damp proofed to be able to protect the brickwork from rotting slowly as moisture sets in. This can be performed by either making use of damp proof membranes, waterproof rendering, or cavity insulation, depending on the type of walls already present in the garage. Damp proofing is a part of the building regulations that the garage conversion should adhere to, therefore is it important to make sure that your garage conversion incorporates 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
| 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 |
Requests for quotations in Somerset in June 2026
Requests for Damp proofing quotations in Somerset in June 2026. 0% change from May 2026.
Requests for Damp proofing quotations in South West in June 2026. 0% change from May 2026.
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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Frome - BA11
Enquiry from: Melissa T
Start Date: Immediate
Rising damp issue needs survey
Frome - BA11
Enquiry from: Jess P
Start Date: Immediate
Is it possible to have someone come and look at the room I have damp in and see if they can work out what the problem is? I think it is coming in from outside but am worried about the white fur that k...
Wincanton - BA9
Enquiry from: Cath C
Start Date: Immediate
would like someone to carry out a damp survey on the house. please could you provide me with some idea of the process and costs to carry this out?
Frome - BA11
Enquiry from: Natasha A
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Obvious damp issues in a couple of the rooms. We're looking for help identifying what the issue is, what needs to be done to fix it and a quote for the associated costs.
Minehead - TA24
Enquiry from: Patrick G
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There are signs of damp and I need a survey and remedial work if required. Please conform that you are a member of The Property Care Association. Thanks,
Wellington - TA21
Enquiry from: Claire R
Start Date: Immediate
Hi, I've a garage door infill 2.8m without a damp proof membrane. Looking for damp proof injections. Bba approved product and guarantee.
Frome - BA11
Enquiry from: Monica N
Start Date: Immediate
There are a few ongoing damp issues: Suspected rising damp along the external wall of the house. Historical leak from bathtub that we would like structural damage to be assessed Leak on bedroom ce...
Taunton - TA4
Enquiry from: Helen B
Start Date: Immediate
We would like a damp survey and report please in one reoom of our house which needs a constant dehumidifier running. We would like advice about what we should do about it! Many thanks
Minehead - TA24
Enquiry from: Ivor P
Start Date: Immediate
We have had a building survey L3 report done on a property we are in the process of purchasing in Huntscott, Minehead. The report has flagged an issue of rising damp, likely from the building stone bu...
Dulverton - TA22
Enquiry from: Anne H
Start Date: Immediate
Holiday let, condensation issues causing damp. I am looking to dry line the walls
Wellington - TA21
Enquiry from: Ellie M
Start Date: Immediate
small entrance porch to flat reported damp on buyers survey. Need a quote to proceed with sale and may get work done
Ilminster - TA19
Enquiry from: Darren R
Start Date: Immediate
rising damp need to fill walls are you the property owner: owner of the property how many rooms do you need damp proofing: 3-4 rooms property type: terrace please call to appoint
Wellington - TA21
Enquiry from: Steve H
Start Date: Immediate
Prevent mould at walls-ceiling junction upstairs
Taunton - TA2
Enquiry from: Rodney C
Start Date: Immediate
Two walls possibly another small one on a bathroom on a terraced house my daughter needs a certificate for a mortgage company
Glastonbury - BA6
Enquiry from: Joan R
Start Date: Immediate
Damp in kitchen of victorian house
Frome - BA11
Enquiry from: Jayne P
Start Date: Immediate
Hello, I wanted to enquire about a damp survey/consultation. We recently had a survey but would like a second opinion on the cause and possible solutions. There are 2 issues we would like looked at...
Frome - BA11
Enquiry from: Joe L
Start Date: Immediate
Review cause of mould in two rooms and provide cost for remediation if required.
Frome - BA11
Enquiry from: Elissa S
Start Date: Immediate
We recently received our building survey report back from Connells Survey and Valuations, regarding a property. The report has raised a few areas of concern, which we would like to have checked ou...
Bruton - BA10
Enquiry from: Caroline B
Start Date: Immediate
Damp in corner of living room
Shepton Mallet - BA4
Enquiry from: Karl S
Start Date: Immediate
We have two walls, both sides have raising damp. We then have a down stairs bedroom 3 walls have raising damp, also need some areas plastered. Can send photos if easier need a quote to last 3-6 months...
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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.
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.
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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