Damp Proofing in Knebworth

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Damp Proofing in Knebworth

Extensions such as garage conversions will often require supplementary damp proofing to be installed as part of conversion, as the existing garage will typically have a single skin design for walls and floors, which was not built to comply with building regulations for habitable rooms. This damp proofing will need to be added to walls and floors. Furthermore, the roof of the garage conversion will need water proofing. The damp proofing for the floor of the garage conversion will often be performed 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 pre-existing concrete floor, underneath 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 may need 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 in order to protect the brickwork from rotting slowly as moisture sets in. This is done 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 important part of the building regulations that the garage conversion should adhere to, and so is it vital to ensure that your garage conversion incorporates suitable damp proofing methods.

Average Damp proofing cost in Knebworth

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

Average price per Damp proofing job in 2026

Avg. price low

Avg. price low
£1,125

Avg. price

Avg. price
£1,500

Avg. price high

Avg. price high
£1,725

£1900

£1425

£950

£475

£0

Prices based on actual Damp proofing costs for Knebworth, as reported by local LeadsDoWork members.

Damp proofing installation cost in Knebworth 2026

Labour cost £1,050
Material cost £375
Waste removal £75
Time frame: 3-5 days
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Knebworth

Knebworth is a village as well as civil parish in the north of Hertfordshire, England, immediately south of Stevenage. The civil parish covers a location in between the villages of Datchworth, Woolmer Green, Codicote, Kimpton, Whitwell, St Paul's Walden as well as Langley, and includes the village of Knebworth, the little village of Old Knebworth as well as Knebworth House. There is evidence of individuals residing in the location as far back as Neolithic times and also it is pointed out in the Domesday Book of 1086 where it is referred to as Chenepeworde (the ranch belonging to the Dane, Cnebba) with a population of 150. The original village, now called Old Knebworth, created around Knebworth House. Growth of the newer Knebworth village began in the late 19th century centred a mile to the east of Old Knebworth on the brand-new railway station and also the Great North Roadway (ultimately the A1, and now the B197 since the opening of the A1(M) motorway in 1962). At the millenium the architect Edwin Lutyens constructed Homewood, southeast of Old Knebworth, as a dower residence for Edith Bulwer-Lytton. Her child, the suffragette Constance Lytton additionally lived there, until prior to her fatality in 1923. Knebworth has, since 1974, been famously related to many major open air rock as well as pop shows at Knebworth House, including Queen's last real-time efficiency which occurred on 9 August 1986 and drew a participation estimated at 125,000, Lynyrd Skynyrd, Oasis playing to a quarter of a million individuals for 2 nights in 1996 and more lately Robbie Williams, that for 3 evenings in August 2003 done to the biggest crowds ever assembled for a solitary performer. Statistics from UK Census 2011: All Residents: 5,247.

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Similar Customer Enquiries for Damp proofing in and around Knebworth

09 Sep

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Luton - LU3

Enquiry from: Timothy D

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Damp proofing need for a home

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04 Jun

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Potters Bar - EN6

Enquiry from: Priyanka R

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To review the damp, see the source, take damp readings and advise the best course of action

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10 Mar

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St. Albans - AL4

Enquiry from: Nick W

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I have penetrating damp on a solid 9inch wall

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12 Jan

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St. Albans - AL3

Enquiry from: Alan S

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Check out damp intrusion coming through walls

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11 Jan

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Bishop's Stortford - CM23

Enquiry from: Car M

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TEST WALLS basement hack off half of wals plaster left tank will be at address 11.30 to 3 sunday and later on monday

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09 Dec

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Potters Bar - EN6

Enquiry from: Nik D

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Possible water penetration in two places in the house

Property: semi detached

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21 Nov

Damp proofing

Harpenden - AL5

Enquiry from: Ben T

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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

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08 Nov

Damp proofing

Welwyn Garden - AL8

Enquiry from: Gregory D

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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

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06 Oct

Damp proofing

Bishop's Stortford - CM23

Enquiry from: Evie R

Start Date: Immediate

Hello [Company Name], I own a property in Bishop’s Stortford and have noticed possible damp and mould behind my kitchen cabinets. I’ve also seen small insects (psocids) which I understand may be l

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02 Oct

Damp proofing

Waltham Cross - EN8

Enquiry from: Lorena S

Start Date: Immediate

A building survey was done and it seems that there is some rising damp in the living room and some possible issues with the isolation in one of the bedrooms. I'd appreciate it if we could discuss thes

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29 Aug

Damp proofing

Bishop's Stortford - CM23

Enquiry from: Carla M

Start Date: Immediate

MAJOR leaks left by insurance company have ingressed into the walls and been tested and surveyed to high damp levels and failed tanking to basement floor and outside toilet courtyard. Quote for all wo

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31 Jul

Damp proofing

Waltham Abbey - EN9

Enquiry from: Graham M

Start Date: Immediate

Skirting blown. Was damp behind skirting and on floor. No pipes in this area, so no leaks. Possibly penetration from outside, next to front door

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03 Mar

Damp proofing

Welwyn Garden City - AL7

Enquiry from: Yvonne M

Start Date: Immediate

Since replacing a conservatory roof, i have a damn issue

Property: terrace

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31 Jan

Damp proofing

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

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12 Dec

Damp proofing

Luton - LU1

Enquiry from: Debbie E

Start Date: Immediate

Damp proofing Lead Damp proofing Lead

Some damp in two rooms in the corner of the rooms

Property: terrace

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02 Dec

Damp proofing

Luton - LU4

Enquiry from: Simon P

Start Date: Immediate

Rising damp three walls with damp rising

Property: commercial

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18 Nov

Damp proofing

Bishop's Stortford - CM23

Enquiry from: James D

Start Date: Immediate

The main issues are dampness in downstairs bathroom and second floor bathroom, as well as potentially the living room. there is also ceiling damage and staining in the downstairs cupboard due to a pos

Property: terrace

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FAQs

How can I tell if my property has damp?

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.

How can I tell what type of damp I’ve got?

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.

Why is it important to fix a damp problem?

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!

How quickly can I redecorate my walls after damp proofing has been installed?

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.

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