10 Best Damp Proofing Specialist in Cornwall UK

In Cornwall, damp doesn’t always look dramatic. Sometimes it’s just a musty room, cold patches that never quite dry out, or flaking paint along a wall that gets no sun.

But left alone, these small signs can turn into costly repairs. The challenge isn’t just spotting damp — it’s finding someone who understands what’s causing it.

The best damp proofing specialist in Cornwall won’t just follow a checklist. They’ll know where local properties tend to fail, how Cornish weather plays into it, and which treatments hold up over time.

We’ve put together a list of firms that take the time to get it right, and who know these buildings better than most.

👉 Must Read: How Do I Choose a Damp Surveyor?

10 best damp proofing specialist in Cornwall UK

1. Newseal Ltd (Truro/Redruth area)

Newseal has been helping homeowners across Cornwall with damp issues for over 20 years. They’re trusted for their straight-talking advice and proper diagnostics, not just patch jobs. 

Customers regularly mention how fast they respond and how clean they leave the space after finishing the work. They’re often called in for rising damp, timber decay, or tanking basements, and they don’t rush through it. 

Their team includes qualified surveyors who really know their stuff and take pride in the job being done right the first time. They also offer insured guarantees, which many of us appreciate for peace of mind. 

If you’re looking for someone reliable, experienced, and easy to work with, they’re a solid first call.

Do they offer free surveys? Yes

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2. FAL Joinery & Damp Proofing

Based in Cornwall FAL Joinery & Damp Proofing has become a go-to name in the county for treating serious damp and timber issues. They’ve been around for decades and back their work with a 30-year guarantee on most treatments. 

Their team is known for being tidy, polite, and very responsive — especially when things need sorting fast. Whether you’ve got wet rot creeping up your walls or damp marks spreading through your basement, they get to the root of the issue quickly. 

They also handle plastering and ventilation once the problem is fixed, which saves customers from needing multiple trades. Their approach is hands-on and thorough, with no upselling or guesswork. 

Ideal if you want someone who knows the area and how local homes behave in damp conditions.

Do they offer free surveys? No

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3. Devon & Cornwall Damp Solutions

This small, independent damp treatment team has earned a strong local reputation for honest advice and neat, professional work. Their surveys are detailed but easy to understand, and often help homeowners avoid unnecessary treatments. 

One standout is how they follow up weeks after completion to check moisture levels again. Customers like how flexible they are with appointments and how clearly they explain what needs doing (and what doesn’t). 

Whether it’s a leaking cavity, a humid kitchen, or a moisture-laden cellar, they’ll work out what’s really going on. Their approach isn’t sales-focused — they genuinely want to get the diagnosis right. 

Perfect for those who want a practical and honest inspection without pressure.

Do they offer free surveys? Yes

👉 Also Discover: 10 Best Damp Proofing Specialists in Swindon UK

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4. Timberwise Damp Proofng

Timberwise has a branch in Truro and brings national-level expertise with a local touch. They specialise in identifying the hidden signs of damp, rot, and condensation before they become structural issues. 

With CSRT-qualified surveyors and full treatment teams, they cover everything from pre-purchase reports to large-scale property protection. They’re professional, punctual, and known for being meticulous with both diagnosis and execution. 

Their team doesn’t just do the work—they explain the reasoning, and give you long-term advice too. Timberwise is great if you’re looking for a larger company that still delivers personal service. They also offer insurance-backed guarantees on their treatments.

Do they offer free surveys? Yes (subject to property type and location)

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5. CSM Plastering & Building Preservation (St Austell )

With more than 35 years of hands-on experience, CSM is a name that keeps cropping up when people in St Austell talk about reliable damp repair. 

They don’t just mask symptoms — they focus on long-term fixes, from the ground up. Their strength lies in combining damp proofing with proper plastering and restoration, which means no visible mess or mismatched finishes once the job’s done. 

Homeowners regularly say the team is friendly, respectful, and leaves the site as clean as they found it. They’re especially good with older properties that need a careful touch. 

If your home has suffered from poor past work, they’re often the ones called in to put things right.

Do they offer free surveys? Yes

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6. ST Building Services (Cornwall-wide)

ST Building Services is a small, family-run firm that blends traditional masonry with modern damp solutions. Known for their careful brickwork, repointing, and reliable damp treatment, they’ve built up a loyal following across Cornwall. 

Reviews highlight their clean finishes, honest quotes, and good communication. If your home needs both damp control and structural repair, they’re a solid all-in-one choice. They’re not flashy — just good, dependable tradespeople who take pride in what they do. 

They’re especially handy when dealing with stone-built Cornish homes that require more than just a generic treatment.

Do they offer free surveys? Yes

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7. Joel Endersby Heritage Restorations

If your home is listed, older, or built with traditional materials, Joel Endersby Heritage Restorations brand is the name to note. These folks don’t rush in with chemicals and tanking — they understand how period properties breathe and react. 

That means repairs are matched to your building, not a one-size-fits-all fix. They’ve worked on Cornish cottages, Georgian townhouses, and everything in between. Their service includes roofing, repointing, and timber preservation alongside proper damp treatment. 

They’re known for going the extra mile, particularly when a client needs a bit of guidance throughout the process. If long-term value and craftsmanship matter to you, they’re well worth a call.

Do they offer free surveys? Yes

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8. Peter Cox

This is the kind of team you call when you want your damp job done properly and left looking sharp. Peter Cox blends damp control with finishing skills — so you don’t need to hire separate trades. 

Clients say the walls look smooth, the woodwork is tidy, and the team is in and out without hassle. They’re especially popular with landlords and sellers looking to get properties into top shape.

Whether it’s rising damp in a bay window or mould on the skirting, they fix it and make it look like nothing ever happened. Great for those who want to finish and function together.

Do they offer free surveys? Yes

👉 Must Read: How to Hire an Independent Damp Specialist in London

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9. J B Building & Damp Proofing

TA Ricketts offers something a little different — they’re damp specialists with a plumbing background. That’s handy when your problem turns out to be a leak, gutter issue, or pipe condensation. 

They offer a full diagnostic service and don’t just throw treatments at the wall. Customers often say their approach is calm, respectful, and grounded in knowledge. 

They’re a great fit for people who’ve had patch-up jobs before and want someone who’ll take the time to solve the root cause. Great service for homeowners and landlords alike.

Do they offer free surveys? Yes

Did you know? 👉: What Is a Damp Survey—And Should You Bother?

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10. ICIRS Independent Damp & Timber Surveys

ICIRS Independent Damp & Timber Surveys is a one-man operation with a growing reputation across Cornwall for efficient, straightforward damp repair. He’s ideal for smaller jobs or people who just want honest answers without sales pitches. 

Customers say he turns up on time, explains everything clearly, and does clean work with minimal fuss. He’s flexible with booking and good at working around tenants’ or household schedules. 

Don’t let the solo setup fool you — he brings the same care and detail as any larger firm. If you want personal service and solid results, he’s a top pick.

Do they offer free surveys? Yes

👉 Read more from us: Damp Proofing UK – Costs, Rules, and What You Need to Know

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Top 10 Best Damp Proofing Specialists Comparison Table

Company Name	Years in Business	Services	Average Rating	Website
Newseal Ltd	20+ years	Damp Surveys, Tanking, Condensation Control, Woodworm, Rot, Wall Tie Replacement, Sub-floor Checks	4.8 ★	newsealltd.com
Cornwall Damp Proofing Ltd	30+ years	Rising Damp, Condensation, Woodworm, Rot, Tanking, DPC, Plaster Repair	4.6 ★	cornwalldampproofing.co.uk
Devon & Cornwall Damp Solutions	25+ years	Damp Reports, Chemical DPC, Humidity Testing, Wall Coatings, Ventilation	4.9 ★	devonandcornwalldampsolutions.co.uk
Timberwise – Truro	25+ years (nationwide)	Damp & Timber Reports, Basement Waterproofing, Woodworm, Ventilation, Structural Timber	4.5 ★	timberwise.co.uk
CSM Plastering & Preservation	15+ years	Damp Proofing, Plastering, Timber Preservation, Wet/Dry Rot, Woodworm, Interior Restoration	4.7 ★	csmplastering.co.uk
ST Building Services	10+ years	Masonry Repairs, Damp Treatment, Repointing, Timber Repairs, Brick Coatings	4.5 ★	stbuildingservices.co.uk
Joel Endersby Heritage Restorations	30+ years	Traditional Damp Proofing, Lime Repointing, Roofing, Restoration, Mould Control	4.9 ★	joelendersby.co.uk
Peter Cox	45+ years	Damp Proofing, Timber Repairs, Skirting Fixes, Plastering, Mould Removal	4.8 ★	petercox.com
J B Building & Damp Proofing	40+ years	Leak Diagnosis, Damp Surveys, Condensation Fixes, Wet Rot, Timber Decay, Gutter Repairs	4.6 ★	jbbuild-dampproof.com
ICIRS Independent Damp & Timber Surveys	35+ years	Damp Reports, DPC Injection, Mould Control, Woodworm, Basic Tanking	4.9 ★	icirs.co.uk

How to Choose a Damp Proofing Specialist in Cornwall (UK)

Finding someone to fix damp isn’t just about who offers the cheapest quote. In Cornwall, with its older buildings and wet climate, the right specialist needs to understand more than just basic treatments. Here are five key things to consider:

You should know this: Is It Worth Paying for a Damp Survey?

1. Check if they understand traditional Cornish buildings

Many properties in Cornwall are built with solid stone walls and no damp-proof course. These homes need breathable materials and sympathetic treatment, not just cement render or injected chemicals.

A specialist who understands lime plaster, slate construction, and solid walls is more likely to treat the problem without creating new ones. Always ask if they’ve worked on older or listed buildings before.

2. Ask what’s included in the survey

A proper damp survey should go beyond a visual check. The specialist should use moisture meters, check ventilation, and inspect areas like gutters, drains, and ground levels.

You want a full explanation of the cause — whether it’s rising damp treatment, condensation, or penetrating moisture — not just a guess. If they offer a solution without investigating properly, that’s a red flag.

3. Decide if you want an independent surveyor

An independent damp surveyor doesn’t carry out the treatment, so they’re not trying to sell you anything. You’ll usually pay for the report, but it’s often more objective.

This is useful if you’ve had conflicting advice or want a second opinion before spending money. It also gives you more power when comparing quotes.

4. Look into their guarantee

Long guarantees sound good, but make sure they’re backed by insurance. If the company closes, you could be left with no protection.

Ask for details in writing and check if the guarantee covers both materials and labour. An insurance-backed guarantee is especially important when selling your home later on.

5. Choose a local expert when possible

Cornwall’s climate is wet and coastal, and the housing stock is unique. A company that works locally will understand common problem areas and know what methods work long-term.

Local firms are also easier to follow up with if anything goes wrong. Familiarity with local materials and building styles often leads to better, more lasting repairs.

👉 Also Discover: 10 Best Damp Survey Companies in London

Conclusion

Damp is one of the most common problems in UK homes, and Cornwall’s weather, older housing stock, and coastal exposure make it even more likely. But choosing the right specialist can make all the difference between a lasting fix and a wasted spend.

The companies listed above have strong local reputations, experience with Cornish properties, and a clear focus on doing things properly. Still, don’t rush. Get a proper survey, compare a few opinions if needed, and ask to see proof behind any diagnosis. The best specialists won’t pressure you — they’ll explain what’s wrong, why it’s happening, and how to put it right.

With the right help, you can stop damp from spreading, protect your home’s value, and avoid future problems — all without unnecessary disruption or expense.

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