Extensions such as garage conversions will usually require supplementary damp proofing to be installed as part of conversion, as the pre-existing garage will typically have a single skin design for walls and floors, which was not manufactured to comply with building regulations for habitable rooms. This damp proofing should be put into walls and floors. Moreover, the roof of the garage conversion will need water proofing. The damp proofing of the floor of the garage conversion will usually be achieved by by using a damp proof membrane. This membrane can come in either solid or liquid form. The damp proof membrane will be placed 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 have been damp proofed, but this might need to be updated as part of the conversion to be able to adhere to current building regulations. The walls should be damp proofed to be able to safeguard the brickwork from rotting gradually as moisture sets in. This is accomplished by either making use of 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 should comply with, therefore is it vital to make sure that your garage conversion employs 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
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| Avg. price | Avg. price |
| Avg. price high | Avg. price high |
£3000
£2250
£1500
£750
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| Labour cost | £1,050 | |
| Material cost | £375 | |
| Waste removal | £75 |
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At Home Energy Save GB Ltd we are specialists in all fields of damp proofing and energy efficiency within the home. Whether your problem is loft condensation, rising damp, penetrating damp, black mould or simply heat loss then we can help. We sp...
Phone consultant was lovely and polite. Barry came out to review our home and was very professional, friendly and gave ...
We are a company that specialises in Damp Proofing & Insulation. We have a 100% success rate in resolving damp issues connected to any form of damp. We can also offer the latest solutions to condensation. We offer a FREE, NO OBLIGATION damp ...
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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
Sandbach - CW11
Enquiry from: Richard G
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I need my cavity wall checked incase it's a cause of damp. I've had two damp survey done that cover everything else but I need the wall checked
Cheadle - SK8
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Inspection of damp damage/severity, proposal of necessary work to repair, quote for cost of work & timescales
Chester - CH1
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I have some black mould developing in three bedrooms, I need to stop it coming back
Warrington - WA3
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Small downstairs toilet needs tanking
Crewe - CW1
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Chester - CH4
Enquiry from: Isabel M
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We have a damp smell at the front of the house and an obvious area of damp in the kitchen. We will need a survey before commencing any work. How much is a full survey for a 4 bed semi-detached please?
Warrington - WA4
Enquiry from: Janet W
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I have a damp and marked gable wall which has been like this for 20+ years. (address removed) is 100 years old and I think the problem is there isn't the damp proofing etc you'd get with a new outside
Middlewich - CW10
Enquiry from: Jack O
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Hi looking for a quote for someone to carry out a damp survey to understand the cause of damp and how much it will cost to rectify in a house I am in the process of buying
Cheadle - SK8
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Can smell damp in bungalow and have a dehumidifier on all the time need some one to come out and look to what the problem is please
Stockport - SK6
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We experienced flooding over New Year. We have had the insurance contractor perform a strip out to aid the drying process and been advised that a salts test was done and nitrates were found indicating
Stockport - SK6
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Builder to look at a concrete floor for damp proofing
Runcorn - WA7
Enquiry from: Rosemary J
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We are hoping to buy a terraced house and the dpc has failed. How much please for 2 reception and kitchen
Stockport - SK7
Enquiry from: Andrew M
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I believe i may have damp in corners of a particular reception room at the property which has presented itself after rainfall. i would like this appropriately assessed and rectified. thanks
Property: detached
Warrington - WA2
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Cheadle - SK8
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I have a flat that has severe rising damp pretty much over the whole flat. We have been advised by a contractor that a specialist should take a look at it and advise as he believes damp proof injectio
Sale - M33
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We have had a surveyors report done on this house which has been empty for a year. A few things came up that we need a specialist to look at
Warrington - WA3
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Can you please provide a quote for limited testing of that room as described below. testing at lower levels revealed areas with elevated moisture readings, with a wood moisture content of approximatel
Widnes - WA8
Enquiry from: Liam L
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Damp course need carrying out
Macclesfield - SK11
Enquiry from: Freddie B
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Hi, I recently had a survey carried out by a member of the family and its come back with penetrating and rising damp. I'm hoping someone can look into this further and provide a quote to fix the issue
Chester - CH3
Enquiry from: Matt H
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Damp patches on interior walls
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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.
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!
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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