Extensions including garage conversions will usually require extra damp proofing to be installed as part of conversion, as the pre-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 should be added to walls and floors. Additionally, the roof of the garage conversion will require water proofing. The damp proofing of the floor of the garage conversion will in most cases be achieved by using 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 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 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 an integral part of the building regulations that the garage conversion will need to adhere to, and so is it vital to ensure that your garage conversion incorporates 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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| Labour cost | £1,050 | |
| Material cost | £375 | |
| Waste removal | £75 |
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Welcome to Heatseal Insulation Ltd We are National Loft insulation and Damp Proofing specialists covering most of the UK. Our objective is to provide an outstanding & reliable service to all our customers offering the latest technology to the Dome...
Good advice, clear understanding of the problem and solution
Luton - LU3
Enquiry from: Timothy D
Start Date: Immediate
Damp proofing need for a home
Harpenden - AL5
Enquiry from: Ben T
Start Date: Immediate
I think i have damp in one bedroom, and it gets much colder than the rest of the house. Another room gets mouldy in one corner, not sure if thats something you can help with. The room where i think it
Welwyn Garden - AL8
Enquiry from: Gregory D
Start Date: Immediate
We had someone quote for DPC repair on one corner of our house where it has clearly failed. But I wanted to see what it would cost to do the whole house while we are at it
Bedford - MK42
Enquiry from: Amar C
Start Date: Immediate
Kitchen has high moisture readings
Royston - SG8
Enquiry from: Vikas K
Start Date: Immediate
Looking for a damp consultant/builder, we have an extension where the dampness in the wall from the bottom up is seen. Upon removing the flooring boards, we see there is a black surface with a membran
Dunstable - LU6
Enquiry from: Dawn S
Start Date: Immediate
Look at where the damp is coming from. In the porch area and in the small bedroom
Luton - LU1
Enquiry from: Debbie E
Start Date: Immediate
Luton - LU4
Enquiry from: Simon P
Start Date: Immediate
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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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