Damp Proofing Northwood

Damp Surveys, Mould Treatment, Timber Preservation & Waterproofing in Northwood

We diagnose the root cause – treat it properly – then provide long-term guarantees!

Before and After Damp of a house
"A very professional company. Damp has fully gone, and it was a miracle. I tried so many times before with other contractors with no luck"

Get Your Damp Proof Survey & Quote

We Find It. We Treat It. We Stop It Coming Back.

Damp Problems in the Northwood Area

Nordic Damp Proofing provides professional damp surveys, mould treatment, timber preservation and waterproofing services across Northwood and the surrounding North West London, Hertfordshire and Buckinghamshire border areas.

We work with homeowners, landlords, letting agents, property managers, buyers and commercial clients who need to understand why damp or mould is affecting a building before deciding what treatment is required.

Northwood has a varied mix of larger detached homes, traditional houses, apartments, rental properties, converted buildings and extensively extended properties. Some homes sit within established gardens with mature planting and shaded external walls, while others have been modernised over several decades with extensions, new windows, insulation and landscaping.

These differences can significantly affect how moisture behaves. Nordic Damp Proofing therefore focuses on identifying the root cause rather than assuming that every low-level damp patch is rising damp or every mould problem is simply poor ventilation.

We provide damp surveys, damp proofing services, rising damp treatment, penetrating damp repairs, mould treatment, condensation control, ventilation assessments, timber surveys, woodworm treatment, wet rot and dry rot treatment, basement waterproofing and structural waterproofing.

Whether you have black mould, recurring condensation, a damp external wall, salt staining, damaged plaster, wet skirting boards, a musty smell, chimney breast staining or suspected timber decay, our surveyors can investigate what is happening and recommend the appropriate next step.

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All reviews
4.9
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Google
4.9
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4.0
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5.0
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Checkatrade
9.6
ExcellentTrustindex star 1Trustindex star 2Trustindex star 3Trustindex star 4Trustindex star 54.9185 reviews
4.9Trustindex star 1Trustindex star 2Trustindex star 3Trustindex star 4Trustindex star 5
Excellent185 reviews
ExcellentGoogle star 1Google star 2Google star 3Google star 4Google star 54.982 reviews
4.9Google star 1Google star 2Google star 3Google star 4Google star 5
Excellent82 reviews
GoodTrustindex star 1Trustindex star 2Trustindex star 3Trustindex star 4Trustindex star 54.01 reviews
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Good1 reviews
ExcellentBark star 1Bark star 2Bark star 3Bark star 4Bark star 55.012 reviews
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Excellent12 reviews
ExcellentCheckatrade star 1Checkatrade star 2Checkatrade star 3Checkatrade star 4Checkatrade star 59.690 reviews
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Excellent90 reviews
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J profile picture
J
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Jamie did an excellent job of fixing damp at my house. He fixed the issues quickly and on time. He plastered to a very high standard. He left the house clean of dust and was a pleasure to have here. would definitely recommend.
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A good company to deal with Everyone I dealt with at NDP was charming and pleasant. NDP investigated and addressed a problem with damp in my utility room. As the issue was not run of the mill, NDP sent two people (Daniel & Harvey) to assess the issue before deciding on a treatment programme. Toby & Jack spent two days addressing all possible causes and, at this stage, it seems the works have successfully addressed the problem. I contacted NDP about a couple of things afterwards and Lydia was very helpful and efficient and sent Ryan to assess and address the issues at the earliest opportunity.
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Angus Auden
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Thanks to Ryan who worked internally inside the house on issues that were highlighted in the survey that was completed by Daniel. He got the jobs done efficiently. Also thanks to Jack who worked externally including part of the roof that needed doing before the winter weather hits. Again done efficiently!
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James Price
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Excellent service, excellent price, really happy with the work completed.
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Mould Treatment Great experience from Nordic. Starting with the survey from Dan, through the project liaison with Lydia and Erin, through to the professional completion of the job from Ryan. Would recommend Nordic!!
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Suzi Andersen
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Very professional company who were proactive, friendly and very responsive. I felt confident that they would offer a great service, and they did. Toby was very cheerful, knowledgeable and very careful with our property. He cleared up beautifully when he'd finished plastering. Jack was also knowledgeable and suggested alternatives for our guttering, which we were appreciative of. He did an excellent job. The office staff (Lydia) were bright and bubbly and were very responsive, which made the process run smoothly and as painless as possible. I would recommend this company without hesitation as I felt they went the extra mile.
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Nordic - when you want a job well done! From the first telephone conversation, through to the end of the project, the quality and professionalism of the company stood out. Site visits were undertaken before the work began, and after the work was completed, to ensure the highest level of customer service. The team which carried out the work, was courteous, reliable and hard working at all times. The team comprised Blane and his apprentice son Louis. Blane’s skill level is excellent and the finished job demonstrates this. Louis worked hard and is now capable of carrying out most aspects of the work. A job well done. Thank you
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Professional, thorough and very reasonable price - Highly Recommended. Cormac was extremely thorough during his extensive visit to our premises to investigate an ongoing damp issue. Although we generally knew the cause, we needed an independent report to provide to the landlord. Cormac was pleasant and forthcoming in discussion with our Centre Manager on site and understood the requirements. The report we received was detailed and contained extensive photos to evidence his explanations. I cannot recommend Cormac and Nordic Damp Proofing enough! Very professional and thorough, And a small note to say extremely reasonably priced.
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Damp Under Stairs Nordic Damp Proofing were very professional, gave a fair quote with no obligation. Had damp issue under stairs in old house, that needed all the old plaster removed and rectified. Ben who completed all work to contract and cleaned up, very pleased. Would use again
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Penetrating Damp & Condensation Treatment We'd tried a few companies to assess our damp and condensation problems but Nordic really stood out. A very thorough survey was carried out by Jason, a few days later a quote was sent and accepted and a very detailed Scope of Work issued. The work was completed quickly and efficiently by Stephen and other Nordic staff, any issues we had were swiftly addressed and professionally handled, our thanks to Jack and Lydia for their constant availability and communication.
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Brad Nichols
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Second time Nordic have done work for me - what a lovely company and job done.
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Salim Ahmed
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Very professional and friendly service. They even called ahead to let me know they were running approximately 10 minutes behind the estimated arrival time due to traffic. Excellent communication and customer service throughout. Highly recommended!
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Tom profile picture
Tom
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Definitely use them again great company
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Tom
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Amazing company and workforce
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Tom
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Good company
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Michael de Villiers
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I had a super gentleman come to my home and review the damp that I suddenly started to have mysteriously and with a sudden onset! He was super friendly and informative and I felt empowered to make the necessary decision as to the way forward with my flats treatment! A rated company and highly recommended 👌☺️👍
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amy profile picture
amy
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Had a reslly lovely experience with Nordic damp proofing. He was very honest and saved me a lot of money. Lovely, friendly and extremely helpful. Thank you so much for coming out and advising me. I 100% recommend nordic damp proofing.
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Efficient and helpful Woodworm survey completed at prospective property. Everyone was communicative and helpful. Even when we had an issue with the time of the survey changing they communicated and it was resolved. The Report was detailed and easy to understand.
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Exceptional service Couldn’t be happier with the service provided by Nordic, their customer service and work was excellent, very happy!
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Damproofing and plastering the tradesman who did the Damproofing and remedial plastering was excellent, we would strongly recommend him.
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Mould treatment Really great work. Clear and helpful communication. Very pleased
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Mr Jonathan Graing
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I’ve just had my 6 month checkup from Nordic preservations after completing the work back in October - everything has dried up perfectly. Great company great service.
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Charles Wright profile picture
Charles Wright
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Installed a piv unit for me was very impressed with the service thanks guys
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Kassie e
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Great service highly reccomend this company for any renovation work
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James H profile picture
James H
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Great service, would highly reccomend this company
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Maria Varney profile picture
Maria Varney
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Cormac came and surveyed my property and explained the issue clearly and how to resolve the issue, did the work the following week to a great standard, really happy with the results! Would recommend to anyone!
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max.moylan
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Mr Mcnicholas was extremely thorough in his analysis and work on our damp issues. Would definitely use again but I doubt I’ll have to with the extensive works that he completed.
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Alex Darbost profile picture
Alex Darbost
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I recently had the pleasure of working with Nordic Preservations to address a damp problem in my bedrooms, and I couldn't be more satisfied with the experience! From start to finish, they delivered top-notch service at a very competitive price. I want to give a special shout-out to Cormac, who was my main point of contact throughout the process. Cormac was incredibly knowledgeable, responsive, and always willing to go the extra mile to ensure everything was done to the highest standard. He took the time to explain the root of the issue and the steps they would take to fix it, which really put my mind at ease. The quality of the work was exceptional, and it's clear that Nordic Preservations takes great pride in their craftsmanship. My bedrooms are now completely damp-free, and the difference is remarkable. I also appreciate how clean and tidy they left everything once the job was done. If you're looking for a reliable, professional, and reasonably priced damp proofing company, I highly recommend Nordic Preservations. Thank you, Cormac, and the entire team for a job well done!
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Will
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Great service and happy with the job. Would highly recommend 👍🏻
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James profile picture
James
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Brilliant guys, super friendly, very accommodating, brilliant end result

Damp Surveys in Northwood

The most important part of damp treatment is finding out why moisture is present.

A patch close to the floor could be rising damp, but it could also be caused by raised paving, soil against an external wall, a leaking pipe or rainwater entering from outside. Black mould in a bedroom may be linked to condensation, but if the external wall is also damp, the colder surface can make that mould problem considerably worse.

Our damp surveys in Northwood look beyond the visible stain. We consider the location and pattern of the moisture, external building defects, ground levels, ventilation, rainwater goods, wall construction, previous repairs and any timber that may have been affected.

We may inspect external brickwork, render and pointing, gutters and downpipes, chimney areas, window surrounds, patios and driveways, airbricks, skirting boards, floor timbers and lower-ground rooms depending on the symptoms present.

Where the moisture route is more complicated, our survey and diagnostic services can provide a more detailed investigation.

Why Our Process Works

A hand holds a digital moisture meter against a white wall near a carpeted floor, displaying a reading of 81.9—an essential step in assessing moisture levels during a Damp Proofing Project in Hemel Hempstead.
A grey icon of a house with a large exclamation mark inside a triangle and three wavy lines below, suggesting a Nordic Damp Proofing warning about flooding or water damage in the home.

Northwood Homes, Mature Gardens and Changes to External Ground Levels

Properties around Northwood often have established gardens, driveways, terraces and landscaping that may have changed considerably since the property was first built.

Landscaping itself does not automatically create a damp problem. However, issues can develop when new patios, raised flower beds or driveways increase the outside ground level against an original wall.

If the damp-proof course becomes bridged or the base of the wall remains wet for longer periods, moisture can begin affecting internal plaster and skirting boards.

Drainage also matters. A driveway that falls towards the house, overflowing guttering or surface water collecting beside the building can contribute to persistent external moisture.

Inside the property, this may appear as low-level staining, salts, peeling paint, swollen skirting boards or a damp smell in rooms next to the affected wall.

Where external drainage may be contributing, our guide on whether French drains can help with damp may be useful.

A grey icon of a house with a large exclamation mark inside a triangle and three wavy lines below, suggesting a Nordic Damp Proofing warning about flooding or water damage in the home.

Damp That Appears After Rain

If staining becomes darker after periods of rainfall, penetrating damp may be involved.

Water can enter through defects in the external envelope and travel through masonry before becoming visible inside. This means the damp patch may not always be directly behind the original problem.

Possible causes include damaged pointing, cracked render, leaking gutters, blocked downpipes, roof defects, chimney problems, failed seals around windows or poorly detailed extension junctions.

Inside, penetrating damp can cause irregular patches, bubbling paint, softened plaster or water marks around ceilings and openings.

Nordic Damp Proofing provides penetrating damp treatment and can also advise on repointing services where external masonry defects are allowing water to enter.

Once the source has been corrected, wall repair and replastering may be required to restore damaged finishes.

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Book Your Damp, Mould & Timber Survey

Protect your home before the problem gets worse. Our friendly surveyors will diagnose the issue, explain the results, and recommend the most effective treatment.

Before you leave...
Speak with an expert

At Nordic Damp Proofing, we’re pleased to offer damp, mould, and timber surveys to homeowners and landlords. In some cases, fees may apply for more detailed reports — but don’t worry, our team will always let you know beforehand.

Submitting this form doesn’t commit you to a survey. One of our friendly team members will contact you within 24 hours to discuss your enquiry and confirm whether a survey is needed. Once booked, we can usually arrange a visit within 24 hours of confirmation.