Extensions such as garage conversions will often require supplementary damp proofing to be added during the conversion, as the existing garage normally has a single skin design for walls and floors, which was not manufactured to conform to building regulations for habitable rooms. This damp proofing will have to be put into walls and floors. In addition, the roof of the garage conversion will require water proofing. The damp proofing for the floor of the garage conversion will often be performed by utilising 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 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 a few garages, the walls have already been damp proofed, but this may have to be improved as part of the conversion in order to meet current building regulations. The walls should be damp proofed to be able to protect the brickwork from rotting slowly as moisture sets in. This is accomplished by either applying damp proof membranes, waterproof rendering, or cavity insulation, depending on the type of walls already present 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 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
| Avg. price low | Avg. price low |
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| 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 |
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Otley - LS21
Enquiry from: Jeremy T
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Mould growing in corners of upstairs bedroom i need sorting. Our gutters have been clean and replaced but it still has not fixed it
Bradford - BD7
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Standing water in cellar, needs water removing and needs a water pump installing
Bradford - BD5
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I need a quote to repair a cellar wall from a burst outside drainage pipe and fixing the coal compartment cellar floor from damp and re-concreting damage due to leak of the pipes
Normanton - WF6
Enquiry from: Eileen M
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Keighley - BD22
Enquiry from: Filip L
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Damp proofing basement kitchen as part of an ongoing renovation. Existing kitchen has been ripped out and needs damp proofing before new kitchen can be installed
Leeds - LS5
Enquiry from: Carol V
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Firstly advice on a problem with my lounge wall under a window and in corner of the room. It must be damp of some kind but is more dry and crumbly
Ilkley - LS29
Enquiry from: Sarah S
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I have had an independent damp survey from Neil Marsden and have damp in upstairs rooms from an old chimney breast with salts coming through. I need the plaster taking back to brick and a waterproof m
Leeds - LS12
Enquiry from: Freya C
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Removal of dru rot under dining area floors, removal/replacement of timber, damp proofing
Sowerby Bridge - HX6
Enquiry from: Jasmine S
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I've got a problem with kitchen damp. I don't know where it's coming from and really need help!
Wakefield - WF3
Enquiry from: Pauline A
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Survey report is requesting pca registered contractor for the whole property. property is empty.. (address removed)
Property: semi detached
Huddersfield - HD5
Enquiry from: Janice M
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Someone to help diagnose where the damp is coming from. chimney or rising damp
Keighley - BD20
Enquiry from: Margaret B
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I think it seems to be rising damp old building only the bedrou
Keighley - BD20
Enquiry from: Eleanor S
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I am a letting agent, and there is a damp problem in the address which we rent out. Please can you contact the tenant for access, but us for a quotation. (address removed) name is Croft End
Bingley - BD16
Enquiry from: Heather G
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Me and my partner had one of our cellar rooms converted into a usable space this summer. The problem we have is that this was built up with a wooden frame rather than cleared and concete applied from
Bradford - BD13
Enquiry from: Inayah S
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I am a landlord and I have condensation in the flat
Hebden Bridge - HX7
Enquiry from: Nicky J
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Hi I require a damp survey of a property I am buying of the cellar to see if it is damp and if it can be tanked
Sowerby Bridge - HX6
Enquiry from: Sean D
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I have 2 apartments with rear walls that are underground at street level but over ground at the front of the properties due to the land gradient. I need damp / waterproofing works to be completed
Pontefract - WF9
Enquiry from: John W
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Inspection for damp issue outside wall of property
Keighley - BD20
Enquiry from: Phil B
Start Date: Immediate
I need a quote for a property on behalf of Wilman and Lodge. There is rot in the basement from damp. The surveyor stated that the wood should be treated and the healthy beams in the basement need trea
Ilkley - LS29
Enquiry from: Angela D
Start Date: Immediate
Condensation I think and damp I think? Peeling paint and black spots around windows and door
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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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