Extensions including garage conversions will usually require extra damp proofing to be added during the conversion, as the existing garage typically has a single skin design for walls and floors, which was not designed to conform to building regulations for habitable rooms. This damp proofing will need to be put into walls and floors. Furthermore, the roof of the garage conversion will require water proofing. The damp proofing for the floor of the garage conversion will most likely 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 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 have been damp proofed, but this might have to be updated as part of the conversion to be able to comply with current building regulations. The walls will need to be damp proofed in order to safeguard the brickwork from rotting slowly as moisture sets in. This can be done by either employing damp proof membranes, waterproof rendering, or cavity insulation, depending on the type of walls that are already present in the garage. Damp proofing is a part of the building regulations that the garage conversion should comply with, and so is it vital to ensure 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 |
|---|---|
| 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 Hampshire in June 2026
Requests for Damp proofing quotations in Hampshire in June 2026. 0% change from May 2026.
Requests for Damp proofing quotations in South East 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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Mark responded promptly to my enquiry and made an appointment to come and look at the issue in question very soon. He ar...
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Farnborough - GU14
Enquiry from: Peter H
Start Date: Immediate
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 ...
Fareham - PO16
Enquiry from: Jacqueline W
Start Date: Immediate
rising damp front of house-tide mark on walls and crumbling walls! Help needs attention!
Romsey - SO51
Enquiry from: Wayne R
Start Date: Immediate
interior damp issue in centre of property are you the property owner: owner of the property how many rooms do you need damp proofing: 1-2 rooms property type: detached please call to appoint
Yateley - GU46
Enquiry from: Richard B
Start Date: Immediate
Quote for rising damp in a few rooms at front of house
Fareham - PO16
Enquiry from: Rosie E
Start Date: Immediate
a survey on one of the walls in the kitchen. the wall is showing discolouration and the paintwork is peeling off. no evidence of mould but that part of the wall is cold to touch also are you the pro...
Fleet - GU51
Enquiry from: Alison F
Start Date: Immediate
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
Start Date: Immediate
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...
Southampton - SO32
Enquiry from: Annette B
Start Date: Immediate
We have flaking walls near chimney breast of our old house recently moved in and looking to make good. Have issues in other rooms too with a musty smell.
Alton - GU34
Enquiry from: Yvonne S
Start Date: Immediate
damp in a room climbing up the walls, with three outside walls are you the property owner: owner of the property how many rooms do you need damp proofing: 1-2 rooms property type: detached please cal...
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 ...
Eastleigh - SO50
Enquiry from: Rebecca W
Start Date: Immediate
I am looking to purchase this property but have been advised by a Building Surveyor that it has damp in the party wall and three external walls. I would need the owners permission to enable access. It...
Stockbridge - SO20
Enquiry from: Julian K
Start Date: Immediate
I am enquiring on behalf of my son who lives at the above address, having recently purchased the property. It is a 3 bed semi, ex local authority built in the 1930s using slate as the DPC. It appears ...
Emsworth - PO10
Enquiry from: Clelia M
Start Date: Immediate
Damp proofing of 2 ground floor rooms and dampness check of 2 bedrooms on the first floor
Basingstoke - RG21
Enquiry from: Nicola G
Start Date: Immediate
I moved in to this house a year and half and would like To get the full house checked for damp please
Eastleigh - SO50
Enquiry from: Marilyn B
Start Date: Immediate
i’d like a free quote for any damp proofing that is required in my conservatory are you the property owner: owner of the property how many rooms do you need damp proofing: 1-2 rooms property type: o...
Aldershot - GU11
Enquiry from: Vincent A
Start Date: Immediate
Remove existing plaster finish in damp wall area Drill 12mm holes at spacing between 100-120 apart and inject (Aida DPC Injection Cream Pro). Wall is 2740 long. After completion holes to be plugged ...
Andover - SP10
Enquiry from: Grant H
Start Date: Immediate
Hi - I have an HMO is Andover and one of the rooms is suffering from Mould. Is there any chance of having a look to see if you can figure out why? Thanks
Alton - GU34
Enquiry from: Eric B
Start Date: Immediate
good afternoon, we are seeking a detailed damp report for our house. a previous third-level survey showed humidity using a humidity meter, but it lacked detailed information. we can share these resul...
Basingstoke - RG25
Enquiry from: Dan R
Start Date: Immediate
Rising damp on 2 or 3 patches of internal walls and around bricked chimney area, 2 bed mid terraced property ~100 years old.
Fleet - GU52
Enquiry from: Oliver G
Start Date: Immediate
explanation how damp in two walls can be cured and cost estimate for the work necessary are you the property owner: owner of the property how many rooms do you need damp proofing: 1-2 rooms property ...
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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.
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.
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