Extensions such as garage conversions will usually require supplementary damp proofing to be installed through the conversion, as the pre-existing garage routinely has a single skin design for walls and floors, which was not built to be in accordance with building regulations for habitable rooms. This damp proofing will need to be put into walls and floors. Additionally, the roofing of the garage conversion will require water proofing. The damp proofing of the floor of the garage conversion will often be achieved by employing a damp proof membrane. This membrane is available in either solid or liquid form. The damp proof membrane will be placed down either on top of the pre-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 improved as part of the conversion to be able to adhere to current building regulations. The walls should be damp proofed to be able to protect the brickwork from rotting gradually 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 that are already in the garage. Damp proofing is an integral part of the building regulations that the garage conversion will need to comply with, therefore is it important to make sure 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
| Avg. price low | Avg. price low |
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| Avg. price | Avg. price |
| Avg. price high | Avg. price high |
£3000
£2250
£1500
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| Labour cost | £1,050 | |
| Material cost | £375 | |
| Waste removal | £75 |
Requests for quotations in South West in October 2024
Requests for Damp proofing quotations in South West in October 2024. 0% change from September 2024.
Requests for Damp proofing quotations in United Kingdom in October 2024. 0% change from September 2024.
Wells - BA5
Enquiry from: Paul J
Start Date: Immediate
a grade 2 listed building. We have significant water ingress in two areas at the rear of the house. We need a solution that is sympathetic to the character of the property.
Bideford - EX39
Enquiry from: Susan L
Start Date: Immediate
i need a free quote because my tenants say that there is some form of damp and i’m not sure what needs to be done. i don’t live locally so i’m unable to see what’s needed. my agents can let y...
Bristol - BS16
Enquiry from: Stefan M
Start Date: Immediate
Hi - have noticed a small (ish) damp area near the back door of our house. Not really sure what's required so a survey as soon as possible would be great. Cheers!
Seaton - EX12
Enquiry from: Anna M
Start Date: Immediate
Need an inspection and advice and possible mould removal
Bournemouth - BH7
Enquiry from: Ceri B
Start Date: Immediate
Damp walls mainly in the lounge area
Newton Abbot - TQ12
Enquiry from: Laura D
Start Date: Immediate
Purchasing the property and survey has come back with rising damp. Would like investigating and quote please.
Swindon - SN6
Enquiry from: Alex F
Start Date: Immediate
I have identified what might be dry or wet rot in wooden beams in my loft (supporting the roof). I wondered if someone is available to come for an inspection and see if there is any rot and to advice ...
Ilfracombe, Woolacombe - EX34
Enquiry from: Jake T
Start Date: Immediate
Rising damp in the living, both sides of fire places. Damp ceilings in front and middle bedroom possibly coming from the loft/chimney stack. Downstairs toilet back wall.
Moreton-in-Marsh - GL56
Enquiry from: Andrea G
Start Date: Immediate
Survey of the property on ground floor this week and works to be undertaken ASAP
Watchet - TA23
Enquiry from: David C
Start Date: Immediate
Damp/mold on floor and walls in front bedroom
Kingsbridge - TQ7
Enquiry from: Jules M
Start Date: Immediate
Bubble and damp wall… no mould
Weston-Super-Mare - BS23
Enquiry from: ALAN P
Start Date: Immediate
Damp and mould around windows on outer walls
Bristol - BS34
Enquiry from: Neil B
Start Date: Immediate
It would appear I have an issue with mould. Can you please call on the number above to discuss. Do you do free surveys?
Wotton-under-Edge - GL12
Enquiry from: Carole W
Start Date: Immediate
Water penetration in 2 areas upstairs. We have tried to resolve it our selves but unsuccessful. Also need a damp proof course put in downstairs
Redruth - TR16
Enquiry from: Chris H
Start Date: Immediate
Small area of wall, rising damp in solid wall
Torquay - TQ2
Enquiry from: Amber J
Start Date: Immediate
Damp patch on living room wall, unsure if it is is a leak or coming down from roof. Needs resolution
Paignton - TQ3
Enquiry from: Yasser T
Start Date: Immediate
signs of rising damp around the front bay window and at the flank wall
Weston-Super-Mare - BS23
Enquiry from: Carolyn A
Start Date: Immediate
Main concrete steps leading up to front door are letting water into the basement flat that is below them.
Chippenham - SN15
Enquiry from: Allan B
Start Date: Immediate
We are refurbishing an extension containing a bedroom and a bathroom. It suffers from damp, condensation and mould.
Bristol - BS37
Enquiry from: Nathan S
Start Date: Immediate
we have a damp patch in the middle of a bedroom wall but it backs onto our neighbours bathroom( which is where i think it's coming from) i just need to be sure first are you the property owner: owner ...
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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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