How to Choose a Damp Proofing Company (And What Most Get Wrong)
Damp is one of those problems homeowners often rush to fix. You notice a damp patch, search online, get a couple of quotes, and book whoever comes back fastest. It feels like a straightforward transaction. But damp proofing is not a straightforward trade, and the company you choose has a direct impact on whether the problem gets solved properly or whether you are dealing with it again in two years.
This guide covers what to actually look for before you book, and the questions most homeowners never think to ask.
Does the company use its own qualified technicians?
This is the single most important question you can ask, and most people never ask it.
A significant number of damp proofing companies operate as management businesses. They take your booking, send a surveyor, then subcontract the physical work to whoever is available. The person who diagnosed your problem is not the person fixing it. The person fixing it may have never seen your survey report. There is no joined-up accountability between the diagnosis and the treatment.
Proofterior operates differently. Every surveyor, every technician, and every person who works on your property is directly employed and trained in-house. The team that surveys your property is connected to the team that treats it. Nothing gets lost between one and the other.
What qualifications should you look for?
Damp proofing is a specialist trade, but it is not a licensed one, which means technically anyone can set up as a damp proofing contractor. Qualifications and professional memberships are the only way to separate specialists from generalists.
Look for accreditation from the Property Care Association (PCA), the industry’s leading professional body for damp and timber specialists. Surveyors accredited by the ISSE (Independent Surveyors and Specialists Ltd) have met additional competency standards specifically for diagnosis and reporting.
Proofterior holds both PCA and ISSE accreditation. Every survey is carried out by an ISSE-accredited surveyor, which means your diagnosis is grounded in recognised industry standards, not guesswork.
Does the company own the job from start to finish?
Even where qualifications are in order, problems arise when different people handle different stages of a job without clear ownership. A surveyor who diagnoses the issue, a project manager who schedules the work, and a subcontracted crew who carry it out is a chain with multiple points of failure.
What you want is a company where the same team takes responsibility for your property from the initial survey through to the completed treatment. If anything needs revisiting, there is a single point of contact. No pointing between departments or contractors. No one claiming the other party was responsible.
That end-to-end accountability is built into how Proofterior operates on every job.
What does the guarantee actually cover?
Most damp proofing companies offer some form of guarantee. What varies significantly is what that guarantee covers, how long it runs, and whether it is honoured when you need it.
A guarantee is only as good as the company behind it. A five-year guarantee from a company that changes its trading name or closes is worth nothing. Longevity and reputation in the local area matter.
Proofterior offers a 25-year guarantee on treatment work. That is a meaningful commitment, not a marketing figure, and it applies to work carried out by a team with over 750 completed projects across Dorset, Hampshire, and Wiltshire.
Does the company offer a written report before you commit?
After any survey, you should receive a written report that explains what was found, what is causing it, and what treatment is recommended. That report should come with a fixed quote, so you know exactly what you are committing to before work begins.
If a company is reluctant to provide a written diagnosis, or gives you a verbal quote with no supporting report, that is worth noting. It makes it much harder to hold them to account if the treatment does not resolve the problem.
Proofterior provides a written survey report and fixed quote within 24 hours of every survey. The survey itself is free, with no obligation to proceed.
Is finance available?
Damp treatment is not always a small job. Structural waterproofing, basement conversions, or full rising damp treatment can run to several thousand pounds. For many homeowners, the cost is the reason a problem gets left longer than it should, which typically makes it more expensive to fix later.
Proofterior offers finance options for eligible customers, so you can get the problem treated now without having to wait until the budget is right. It removes the practical reason for putting it off.
Flexible terms
Spread the cost into monthly payments
Quick application
Apply online in minutes with our finance partner, Ideal4Finance.
0% APR finance
From 3 to 24 months, pick a plan that works for you.
Frequently Asked Questions
How do I know if a damp proofing company is reputable?
Look for PCA membership and ISSE-accredited surveyors. Ask whether the company uses its own in-house team or subcontracts the work, and check whether they provide a written survey report before you commit to anything.
What questions should I ask a damp proofing company before booking?
Ask whether their technicians are directly employed and qualified, whether they provide a written diagnosis and fixed quote, how long their guarantee runs, and whether the same team handles the job from survey to completion.
Is a free damp survey worth it?
Yes, provided it comes with a written report. A proper survey should include moisture readings, an accurate diagnosis, and a clear explanation of the recommended treatment. Proofterior’s free survey includes all of this with a fixed quote returned within 24 hours.
What is the difference between a damp proofing company and a general builder?
A specialist damp proofing company has surveyors and technicians trained specifically in damp diagnosis, timber treatment, and structural waterproofing. A general builder may be able to patch surface symptoms but is unlikely to address the underlying cause.
How long does rising damp treatment take to show results?
Following installation of the Proofterior Dry System, the new chemical DPC immediately interrupts the capillary moisture pathway, preventing further groundwater from rising into the wall fabric. However, residual moisture already within the wall will take time to evaporate naturally through the breathable new finishes. Walls typically stabilise over several weeks to a few months depending on wall thickness, masonry density, and seasonal ventilation conditions. Adequate airflow within the treated rooms supports the drying process, and the upgraded subfloor air bricks installed as part of this project also contribute to lowering moisture levels at the base of the wall during this period.
Ready to protect your Property?
Book a damp survey with Proofterior. Our local damp specialists deliver clear diagnosis, tidy repairs, and long-lasting proofing that keeps homes dry, healthy, and comfortable.
