Extensions such as garage conversions will typically require supplementary damp proofing to be added as part of conversion, as the existing garage routinely has a single skin design for walls and floors, which was not built to comply with building regulations for habitable rooms. This damp proofing will have to 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 often be achieved by by using a damp proof membrane. This membrane will 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 whether the floor will be a solid or a floating floor. In a few garages, the walls have been damp proofed, but this may have to be updated as part of the conversion to be able to adhere to current building regulations. The walls will need to be damp proofed in order to protect the brickwork from rotting gradually as moisture sets in. This can be performed by either implementing 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 important part of the building regulations that the garage conversion should comply with, and so is it vital to ensure 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
| 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 Welwyn in March 2025
Requests for Damp proofing quotations in Welwyn in March 2025. 0% change from February 2025.
Requests for Damp proofing quotations in Hertfordshire in March 2025. 0% change from February 2025.
Welwyn (population 8,425) is a town and also civil parish in Hertfordshire, England. The parish also includes the villages of Digswell and also Oaklands. It is often called Old Welwyn to differentiate it from the much more recent settlement of Welwyn Garden City, about a mile to the south, though some citizens dislike the tip of inferiority or irrelevance that has a tendency to be indicated by the tag "Old" as well as choose Welwyn Town. When saying where they live, citizens will commonly be asked, 'Welwyn or Welwyn Garden City?', as the latter's title is commonly shortened to merely Welwyn. To avoid complication, there were strategies to transform Welwyn's name to 'Welwyn Minster' in 1990 but this consulted with neighborhood resistance as well as the concept was abandoned. The name is derived from Old English welig definition "willow", referring to the trees that snuggle on the financial institutions of the River Mimram as it streams with the town. The name itself is an evolution from weligun, the dative form of the word, and so is extra precisely converted as "at the willows", unlike nearby Willian which is most likely to mean just "the willows". Through having its name derived from welig rather than sealh (the more generally mentioned Old English word for willow), Welwyn is potentially cognate with Heligan in Cornwall whose name is stemmed from helygen, the Cornish word for willow that shares a root with welig. The neighboring modern-day town of Digswell (around Welwyn North train station) was originally called 'High Welwyn' when first developed at the start of the 20th century.
Welwyn Garden City - AL7
Enquiry from: Yvonne M
Start Date: Immediate
since replacing a conservatory roof, i have a damn issue 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 ap...
Welwyn - AL6
Enquiry from: Ross H
Start Date: Immediate
Mould removal behind my kitchen units please
Welwyn Garden City - AL7
Enquiry from: Manuel I
Start Date: Immediate
the property had cavity walls insulated. i believe this hasn't been done correctly and may lead to damp and condensation issues. we are in the process of buying the property
Welwyn Garden City - AL7
Enquiry from: Antony R
Start Date: Immediate
Identification - think it's mould, not sure. Looks to be from a leaking internal pipe. If so, fixing of pipe and removal of mould. Are you the property owner: Owner of the property How many rooms do ...
Welwyn Garden City - AL7
Enquiry from: Antony R
Start Date: Immediate
Identification - think it's mould, not sure. Looks to be from a leaking internal pipe. If so, fixing of pipe and removal of mould. Are you the property owner: Owner of the property How many rooms do ...
Enfield - EN1
Enquiry from: Ignazina S
Start Date: Immediate
ceiling on the stairs has mould and needs treatment and sealing are you the property owner: owner of the property how many rooms do you need damp proofing: 1-2 rooms property type: other please call ...
Borehamwood - WD6
Enquiry from: Susan L
Start Date: Immediate
not sure what’s needed no sign of damp inside but green mould growing on outside wall are you the property owner: owner of the property how many rooms do you need damp proofing: 1-2 rooms property t...
Enfield - EN3
Enquiry from: CBM L
Start Date: Immediate
mould treatment and removal. are you the property owner: owner of the property how many rooms do you need damp proofing: 3-4 rooms property type: detached please call to appoint
Enfield - EN2
Enquiry from: Natalie B
Start Date: Immediate
i would like a risk assessment done on my flat that i am currently renting from the council, walls has been treated twice, 3 members in the household are asmhatic, and building has history of leaks an...
London - NW7
Enquiry from: Ruby R
Start Date: Immediate
we would like a damp survey of a 2 bed flat how many rooms do you need damp proofing: 1-2 rooms property type: semi detached are you the property owner: owner of the property please call to appoint
Borehamwood - WD6
Enquiry from: Rene G
Start Date: Immediate
damp survey throughout the house are you the property owner: tenant (with permission) how many rooms do you need damp proofing: 3-4 rooms property type: semi detached please call to appoint
Bushey - WD23
Enquiry from: Andrea L
Start Date: Immediate
damp patches and mould and swollen wooden front door. the property is a first floor maisonette the damp is only in this area. this has appeared in recent weeks and is not a historical problem. i ha...
Bushey - WD23
Enquiry from: Susan A
Start Date: Immediate
mould on bathroom floor and behind toilet are you the property owner: owner of the property how many rooms do you need damp proofing: 1-2 rooms property type: other please call to appoint
Borehamwood - WD6
Enquiry from: Rene G
Start Date: Immediate
mould found in bedroom last night as well as bathroom over the weekend. would like a quotation please are you the property owner: tenant (with permission) how many rooms do you need damp proofing: 1-2...
Barnet - EN5
Enquiry from: Millie P
Start Date: Immediate
slight mould in shower room and corner of room. needs treating are you the property owner: owner of the property are you the property owner: tenant (with permission) how many rooms do you need damp pr...
Enfield - EN2
Enquiry from: Daniel E
Start Date: Immediate
Hi There, there's mould in my bathroom. Would like to explore options to clear / remove this. Thanks!
Borehamwood - WD6
Enquiry from: Marc J
Start Date: Immediate
Hi, we are looking to get a quotation after a survey found damp in the kitchen. Many thanks, Marc Please call to appoint
Enfield - EN1
Enquiry from: Sarah M
Start Date: Immediate
bathroom extractor fans not working, need old ones removed and new ones fitted. Are you the property owner: Owner of the property How many rooms do you need damp proofing: 1-2 Rooms Property Type: Oth...
Barnet - EN4
Enquiry from: Mike S
Start Date: Immediate
Hi there, we have had damp and mould issues for a bit of time now but the mould has erupted a lot more in the past few weeks. We would like to not only remove it but also test it , find the source and...
Borehamwood - WD6
Enquiry from: Jeremiah O
Start Date: Immediate
I can smell mould in the bathroom and also in my bedroom, which is also the room adjacent, however, I am unable to visually identify any.There may also be mould which has extended again to the kitchen...
Answer a few quick questions, so we can match you with local damp proofing specialists who can help.
Get free, no-obligation local damp proofing quotes from 4 verified damp proofing specialists working in Welwyn.
Compare customer reviews, services and prices, and choose the right tradesperson for you.
Would highly recommend, they found me a firm which I was happy with a quote they give me and went ahead and had my job done within 2 days of enquiring.
Good easy way to find a selection of trades you need all in one place.
Love LeadsDoWork it's a big part of my Business I would recommend to anyone
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.
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.
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.
We can help you get more damp proofing work with our qualified job leads and boost your business.
Join today