Extensions such as garage conversions will usually require supplementary damp proofing to be installed through the conversion, as the existing garage typically has a single skin design for walls and floors, which was not manufactured to be in accordance with building regulations for habitable rooms. This damp proofing will have to be added to walls and floors. Furthermore, the roof of the garage conversion will need 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 placed 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 some garages, the walls will have already been damp proofed, but this may have to be improved as part of the conversion to be able to comply with 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 is accomplished by either using damp proof membranes, waterproof rendering, or cavity insulation, depending on the type of walls that are already present in the garage. Damp proofing is an important part of the building regulations that the garage conversion should comply with, therefore is it important to ensure 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 South Glamorgan in March 2025
Requests for Damp proofing quotations in South Glamorgan in March 2025. 0% change from February 2025.
Requests for Damp proofing quotations in Wales in March 2025. 0% change from February 2025.
Barry - CF62
Enquiry from: Stacey W
Start Date: Immediate
I have had a level 3 RICS survey conducted on a property that I’m looking to purchase. This has raised a couple of queries with regards to damp in the property. I’m looking for a specialist to com...
Llantwit Major - CF61
Enquiry from: Caroline M
Start Date: Immediate
Not sure? It needs investigating by someone who knows as surveyor had a damp measure that didn't go into wall so couldn't check
Cardiff - CF14
Enquiry from: Rohaan S
Start Date: Immediate
Discovered a few patches of damp, I would like a free quote so I know how much it will cost to repair
Penarth, Dinas Powys - CF64
Enquiry from: Nia M
Start Date: Immediate
Damp course on two walls downstairs
Cowbridge - CF71
Enquiry from: Steve J
Start Date: Immediate
I think its rising damp .It is lower part of a wall in the lounge. It presents with small damp patches.We need to speak with you for further details
Barry - CF62
Enquiry from: Kirby R
Start Date: Immediate
Investigation into damp on outside wall and kitchen ceiling with possible treatment.
Barry - CF63
Enquiry from: Shireen T
Start Date: Immediate
Hi I have an internal wall in the house that separates the living room from the hall wall as you walk into the house. The bottom of the wall right the way along is wet and progressing I'm not sure ...
Barry - CF62
Enquiry from: Jessica S
Start Date: Immediate
Front room and dining room possible rising damp. Newly brought the property
Barry - CF62
Enquiry from: Victoria S
Start Date: Immediate
Hello I am wanting to get this property checked pre-purchase. If I can arrange with agent, can you help? Thanks
Barry - CF62
Enquiry from: Anthony E
Start Date: Immediate
I have a set of patio doors with a sign of damp around the inside walls and floor.
Cardiff - CF24
Enquiry from: Shuzela M
Start Date: Immediate
I need my walls checked to see if there is damp I know there is damb next to window wall
Barry - CF63
Enquiry from: Lauren J
Start Date: Immediate
Hi, we have damp issues affecting multiple rooms - not sure exactly what is required, we're looking for a specialist to assess, provide advice and a quote to carry out the work. Is this something you ...
Llantwit Major - CF61
Enquiry from: Susan H
Start Date: Immediate
damp proofing to exterior kitchen walls and possibly floor are you the property owner: owner of the property how many rooms do you need damp proofing: 1-2 rooms property type: semi detached please ca...
Cardiff - CF5
Enquiry from: Caroline G
Start Date: Immediate
Internal work for damp wall. Outside rendering has been re done as there were cracks. Plaster to be stripped and wall treated and made good.
Cardiff - CF5
Enquiry from: Nathan H
Start Date: Immediate
Damp in hallway and living room
Cardiff - CF5
Enquiry from: Kate B
Start Date: Immediate
Our house is a recently renovated 1920s property. Despite a new roof, some new windows and re-plaster, there is evidence of damp in the walls of *** floor bedrooms. We would like a visit to assess the...
Barry - CF63
Enquiry from: Jodie P
Start Date: Immediate
I need a survey to find out where the damp is coming from in my spare room.
Barry - CF62
Enquiry from: Mathew W
Start Date: Immediate
Woodworm investigation and treatment
Barry - CF62
Enquiry from: Ethan R
Start Date: Immediate
After a quote for inspection of damp issues in two upstairs bedrooms, same side of house. Mould is gathering on ceiling and wall surrounding/near window
Barry - CF62
Enquiry from: Jane W
Start Date: Immediate
Hi We have tenant with condenastion/damp issues please can you investigate the issue/reason causing it tenants detail are Stacey *** to arrange access. Thank you
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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.
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!
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