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Penetrating Damp

Penetrating damp is a moisture issue caused by water seeping into a building's walls, ceilings, or floors. This can occur due to leaks from outside or problems with the building's structure.

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Eliminate Damp and Protect Your Property

Is damp creeping up your walls, ruining your décor, and creating a musty smell in your home? You might have penetrating damp. If left untreated, it’s a serious issue that can cause mould, timber decay, and costly damage.

As said above, penetrating damp occurs when water seeps through external walls. This can happen due to damaged brickwork, faulty gutters, or poor waterproofing. It’s a serious problem that affects thousands of UK homes every year. If you’ve noticed damp patches that worsen after rainfall, peeling wallpaper, or cold, damp walls, your property may be at risk.

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Common Causes of Penetrating Damp

Cracked or Porous Brickwork

Over time, bricks and mortar joints degrade, allowing moisture to penetrate.

Leaking Gutters & Downpipes

Faulty drainage systems direct water onto external walls instead of away from the building.

Compromised Exterior Coatings

Damaged render or missing waterproofing leaves walls exposed to moisture ingress.

Roofing Issues

Missing or broken roof tiles and ineffective flashing allow water to seep into ceilings and lofts.

Defective Window & Door Seals

Poorly fitted or ageing seals create gaps where water can enter.

At Prokil, we specialise in professional penetrating damp treatment. Our team use industry-leading methods to eliminate moisture ingress and prevent permanent damage. Don’t let damp take hold. Discover how our proven solutions can protect your property today.

If you suspect you have a problem caused by penetrating damp, book a damp survey online or call our friendly team today on 0800 048 9488.

Book a Survey or call us on 0800 048 9488

How to Identify Penetrating Damp

Penetrating or lateral damp occurs when water seeps into a building’s structure through external defects. Unlike rising damp, which rises from the ground, penetrating damp can impact any part of a property. It often gets worse after heavy rain. If left untreated, it can lead to structural damage, mould growth, and increased energy bills due to damp insulation. However, early detection can prevent costly repairs.

Signs of penetrating damp include…

  • Damp patches on walls, which worsen after rain.
  • Peeling wallpaper and blistering paint, particularly in isolated areas.
  • Cold, damp-feeling walls, even when the heating is on.
  • Musty smells and visible mould growth, typically in one area rather than spread throughout a room.
  • Water stains near windows, doors, or ceilings indicate external moisture penetration.
  • Algae or moss growth on external walls indicates that water consistently affects the brickwork.

If you’ve noticed any of these signs, a professional damp survey is essential to assess the severity of the issue.

Book a Survey or call us on 0800 048 9488

Damp Effects

Mould & Black MouldStructural Damage & Decorative Spoiling Remediation

The Consequences of Ignoring Penetrating Damp

Damp problems do more than ruin a home’s appearance. Left untreated, they can cause severe damage to both the building and the health of its occupants.

Structural Damage & Rising Costs

  • Compromised Brickwork & Mortar – Moisture weakens construction materials, accelerating deterioration.
  • Insulation Failure & Higher Heating Bills – Damp insulation loses effectiveness, making your home harder to heat.
  • Rotting Timbers – Floor joists, skirting boards, and window frames can decay due to prolonged moisture exposure.
  • Plaster & Paint Deterioration – Damp surfaces lead to flaking paint, damaged plaster, and costly redecoration.

Health Hazards Linked to Damp & Mould

Penetrating damp creates the perfect conditions for mould growth, which can lead to…

  • Respiratory Issues – Mould spores and damp air aggravate asthma and other lung conditions.
  • Increased Allergies & Skin Irritation – Exposure to damp environments can trigger allergic reactions and sinus infections.
  • Poor Indoor Air Quality – Damp conditions contribute to an unhealthy home environment, particularly for children and the elderly.

According to the NHS staying in damp and mouldy environments for a long time can harm health. This is especially risky for people with breathing issues and, in the most severe cases, can cause death.

Book a Survey or call us on 0800 048 9488

Professional Penetrating Damp Treatment from Prokil

At Prokil, we specialise in damp treatment services. We tackle moisture problems to prevent lasting damage. Our certified experts follow a structured five-step process. This allows us to diagnose, treat, and protect your home from penetrating damp as efficiently as possible.

1. Damp Survey & Diagnosis

A damp specialist will assess your property, identifying the source of moisture ingress and the extent of the damage. We use top equipment to find hidden damp spots, check for structural problems, and identify areas that might get damaged in the future.

2. Structural Repairs & Moisture Control

Once the damp source is identified, we carry out the necessary repairs, which may include…

  • Repointing and sealing damaged brickwork to prevent further water absorption.
  • Fixing or replacing leaking gutters and downpipes to redirect water away from external walls.
  • Repairing roofing defects, such as missing tiles and ineffective flashing.
  • Resealing windows and doors to eliminate moisture entry points.

3. Protective Coatings & Damp-Proofing Solutions

To prevent further moisture penetration, we apply breathable waterproof coatings that…

  • Repel rainwater while allowing internal moisture to escape.
  • Protect brickwork and external finishes from further deterioration.
  • Extend the lifespan of your property’s external surfaces.

For severely affected properties, we may recommend internal damp-proof membranes or specialist insulating plaster to provide an extra layer of protection.

4. Ventilation & Prevention Strategies

To ensure long-term damp control, we assess your property’s airflow and ventilation efficiency.

Where necessary, we may install…

  • Passive air vents to improve circulation.
  • Upgraded extractor fans in high-moisture areas like kitchens and bathrooms.
  • Condensation control systems to maintain balanced humidity levels.

5. Final Inspection & Aftercare Advice

Once treatment is complete, we conduct a final assessment to ensure all damp issues have been fully resolved. Our specialists provide tailored maintenance advice to help you prevent future moisture problems.

All our penetrating damp treatments come with The Prokil Guarantee – a 20-year guarantee for long-term peace of mind.

Book a Survey or call us on 0800 048 9488

Damp Treatments

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Get Guaranteed Damp Protection with Prokil

Penetrating damp can cause severe damage if left untreated. It can affect both your property’s structure and your indoor air quality. However, with the proper treatment, your home can be fully protected for years to come.

Why Choose Prokil for Your Damp Treatment?

  • 50+ Years of Expertise – We’ve been eliminating damp problems for decades, helping thousands of property owners protect their homes.
  • PCA-Accredited Specialists – Our team comprises fully qualified, industry-certified damp specialists—not commission-driven salespeople.
  • 20-Year Guarantee on Treatments – We back our work with a long-term guarantee, ensuring your home remains protected.
  • Transparent Pricing with No Hidden Costs – Our damp surveys provide honest assessments and cost-effective solutions without unnecessary upselling.
  • Nationwide Service with Local Expertise – With branches across the UK, we offer specialist damp treatment services tailored to local conditions.

Taking the proper steps now can save you from future stress and costly repairs. Our experts are ready to help – reach out today for a professional damp survey and long-term protection. Take the first step toward a dry, damp-free home today.

Call 0800 048 9488 or book your free damp survey now at Prokil.

Book a Survey or call us on 0800 048 9488

Affected by penetrating damp?

Call us now on 0800 048 9488

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Simon - Prokil Team Member

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Book a survey from any of our locations, at a time that suits you.

2

Our experts give a quote

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Based on a quote, we carry out the work guaranteed for 20 years.

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