Damp Proofing
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Rising damp problems in walls arise from insufficient damp proof courses or where damp proofing was overlooked during initial building or subsequent renovation work.
Rising damp occurs in walls when there's no proper damp proof course present or where damp proofing was missed during previous construction or renovation work.
Rising damp can be detected in properties through various methods. A Building Survey may identify rising damp, or specialized testing at the base of affected walls can reveal the problem, though in serious cases where damp has remained untreated for extended periods, visible moisture patches and hygroscopic salts will appear on wall surfaces.
Proper damp proofing treatment involves stripping wall plaster to around one metre in height or more (based on salt levels in the masonry and other considerations). Additionally, installing a new damp proof course in the affected walls will deliver ongoing protection for the property."
Damp Proofing Walls
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How is a damp proof course installed?
Installing a damp proof course involves two essential components. Getting the damp proof course installation right from the start is crucial to prevent making the problem worse and avoid extra costs and re-treatment later. You can discuss the installation process with a Kennedy Damp Proofing specialist, but here's the fundamental approach.
Initially, a damp proof course is installed using a systematic drilling pattern into the masonry at the foundation level of affected walls, then injecting a specialized Kennedy siliconate solution or Kennedy DPC cream until the full wall depth is completely saturated.
Kennedy Damp Proofing's injection method for treating damp walls produces minimal odour and sets within the masonry to create a waterproof barrier against rising moisture, stopping dampness from travelling upward from ground level into the treated areas. Connecting walls are protected using vertical damp proof courses as part of the comprehensive treatment.
Combined with our professional waterproof rendering system, this delivers a dependable and economical treatment solution to eliminate damp wall problems in your property.
The newly installed damp proof course in the treated walls will block moisture penetration and allow the masonry to start drying naturally. However, because of ground salt contamination, the walls won't dry completely unless existing plaster is stripped away and replaced with salt-resistant render, such as Kennedy's Premix Waterproof Rendering System.
Kennedy's Waterproof Rendering System benefits include precisely measured renders where sand, cement, lime and waterproofing ratios are factory-controlled by computer systems, rather than relying on site workers manually mixing various bagged materials. After applying the waterproof rendering system during wall damp proofing, we finish with a top coat skim plaster for a smooth final surface.
In situations with high ground levels, Kennedy's tanking system may also be necessary alongside the chemical damp proofing treatment.
Comprehensive Range Of Services To Home Owners
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We offer comprehensive range of services to home owners and property professionals or can work with your builder to undertake the specialist damp proofing as part of your overall refurbishment.
How is a damp proof course installed?
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Get Expert Damp Proofing, Book Your Free Survey Today
Whether you're worried about rising damp, mould patches, condensation, or timber decay, Kennedy Damp Proofing is here to help. We offer free damp surveys across Brighton, Hove, Shoreham, and Sussex, with fast response times and 30-year guaranteed treatments. Our certified team will inspect your property, explain the issue in plain English, and provide a clear, no-obligation quote, so you can take action with confidence.
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Phone - 01273 110107
Email - [email protected]
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Areas We Cover
If your area is within an hour of Hassocks, give us a call as we can still cover your location, and where possible we will accommodate.
Frequently Asked Questions
Before calling, here are some questions people often ask us which may answer your query.
What do damp proofers do?
Damp specialists examine properties to detect moisture issues, locate the root cause, and implement targeted solutions such as chemical damp proof course injection, protective membrane installation, improved ventilation systems, or waterproof tanking to eliminate dampness and stop future moisture penetration.
What are the first signs of damp in a house?
Early signs of damp include black mould near skirting boards, musty smells, peeling wallpaper, salt staining, or cold patches on walls, even when the heating is on.
Is damp proofing covered by a guarantee?
Yes. At Kennedy Damp Proofing, all our treatments come with a 25-year guarantee, covering both materials and installation when carried out by us.
What is the best damp proofing method?
The best method depends on the cause. For rising damp, DPC injection or membrane damp proof courses are common. For basements, BS 8102-compliant tanking systems like Triton TT55 are ideal. A proper survey ensures the right solution is used.
Is damp proofing worth it?
Yes. Damp proofing protects your property's structure, prevents health risks from mould, improves energy efficiency, and maintains resale value. It’s a long-term investment in your home.
How do you know if you need damp proofing?
If you see mould, peeling paint, musty smells, damp patches, or warped timber, especially on lower walls or near windows, it’s time for a professional damp survey.
What are the side effects of damp proofing?
When done professionally, side effects are minimal. Poorly installed systems may trap moisture or cause further issues. That’s why we only use certified methods and breathable materials to ensure safe, lasting results.
Which areas do you cover?
We are based in Hassocks, but cover all of Sussex, and all along the South of England. If you are in a town/village nearby, please contact us and we can visit for a quick survey.
Can damp cause health issues?
Yes. Untreated damp and mould can worsen respiratory issues, trigger allergies, and affect indoor air quality, especially in poorly ventilated areas.
How long does damp proofing take?
Most damp proofing jobs take 1–5 days depending on the severity and area size. We provide a clear timeframe after your free survey.
Will I need to leave my home during treatment?
In most cases, no. Our technicians work cleanly and efficiently to minimise disruption, keeping your home safe and liveable throughout the process.
What are the advantages of damp proofing?
Damp proofing protects your health by eliminating harmful mould, preserves your property's structure and value, reduces heating costs, creates a more comfortable living environment, and provides long-term peace of mind with professional guarantees.
What are the requirements for damp proofing?
Successful damp proofing needs thorough assessment using specialist equipment, careful preparation of affected areas, application of appropriate treatments like DPC injection or membranes by experienced professionals, compliance with building regulations, and proper warranties on both materials and workmanship.
Can damp come back after damp proofing?
When carried out properly by qualified professionals using quality materials and methods, damp proofing should provide long-lasting protection, but poor workmanship, inadequate diagnosis, or new issues like roof leaks or broken gutters can allow moisture problems to return.
