Extensions such as garage conversions will usually require extra damp proofing to be installed through the conversion, as the pre-existing garage typically has a single skin design for walls and floors, which was not built to comply with building regulations for habitable rooms. This damp proofing should be added to walls and floors. In addition, the roof of the garage conversion will need water proofing. The damp proofing of the floor of the garage conversion will in most cases be achieved by utilising a damp proof membrane. This membrane can 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 some garages, the walls will have already been damp proofed, but this might have to be updated as part of the conversion in order to comply with current building regulations. The walls should be damp proofed in order to safeguard the brickwork from rotting gradually as moisture sets in. This can be done by either implementing 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 adhere to, therefore is it vital to ensure 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
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| Avg. price | Avg. price |
| Avg. price high | Avg. price high |
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| Labour cost | £1,050 | |
| Material cost | £375 | |
| Waste removal | £75 |
Requests for quotations in Olney in May 2026
Requests for Damp proofing quotations in Olney in May 2026. 0% change from April 2026.
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Olney is a market town as well as civil church in the Borough of Milton Keynes in South East England. At the 2011 Census, it had a population of around 6,500 people. It rests on the River Great Ouse, really near the boundaries of Buckinghamshire with Bedfordshire and Northamptonshire, as well as equidistant from Northampton, Bedford and Milton Keynes. It is accessed by the M1 at Junction 14 (approximately 7 miles), with the closest guest rail service at Milton Keynes Central and also Bedford train stations (each approximately twelve miles distant). It is a popular vacationer location, perhaps best understood for the Olney Pancake Race and also for the Olney Hymns by William Cowper as well as John Newton.
Olney - MK46
Enquiry from: Amy M
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RICS level 3 survey has indicated high moisture levels and rising damp on internal faces of external walls in a number of locations throughout the property. Can I please arrange a quote for a small 2 ...
Olney - MK46
Enquiry from: Jason A
Start Date: Immediate
Rising damp in lower floor
Olney - MK46
Enquiry from: Jason A
Start Date: Immediate
Front external wall has damp issues
Olney - MK46
Enquiry from: William J
Start Date: Immediate
We need someone to inspect potential rising damp on the front wall and an interior dividing wall, and then potentially carry out remedial work.
Olney - MK46
Enquiry from: Mary J
Start Date: Immediate
damp proof small area by the back door are you the property owner: owner of the property how many rooms do you need damp proofing: 1-2 rooms property type: terrace please call to appoint
Olney - MK46
Enquiry from: Luke M
Start Date: Immediate
hello, we have just received our level 3 building survey for the property we are in the process of purchasing - 34 dartmouth rd, olney. there are areas within the report which highligh potential damp...
Olney - MK46
Enquiry from: Jessica O
Start Date: Immediate
Rising damp diagnosis/treatment to 3 walls
Olney - MK46
Enquiry from: Kate E
Start Date: Immediate
damp in fireplace and along ground floor all, condensation in downstairs windows. are you the property owner: owner of the property how many rooms do you need damp proofing: 1-2 rooms property type: t...
Olney - MK46
Enquiry from: Darrell P
Start Date: Immediate
we are purchasing this house and would like a survey for damp so we can ascertain how bad it is and the costs associated after the survey report raised this. i need to know the cost of the survey and ...
Olney - MK46
Enquiry from: Catherine S
Start Date: Immediate
Rising damp
Olney - MK46
Enquiry from: Andy M
Start Date: Immediate
Black mould on ceiling in bedrooms Homeowner Please contact to appoint
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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.
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.
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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