Damp and Timber Specialists for 50 years

Why Ventilation Matters for Damp & Mould Control

Inadequate ventilation is a significant cause of condensation, black mould, and decorative damage. It can also lead to structural problems and health risks, especially in airtight buildings with poor airflow. Moisture-rich places are perfect for dust mites and mould spores. These can often trigger asthma, especially in children and those who are more at risk.

Whether you own a home, rent out properties, or manage multiple properties, our expert surveyors will inspect your building. At Prokil, we provide survey-led ventilation systems to reduce indoor humidity and stop damp and mould at the source. Our team will identify the cause of poor ventilation and provide the right solution without any sales pressure.

Our ventilation systems are customised for each property and comply with British Standards. With over 50 years of expert experience, we offer The Prokil Guarantee. This offers our customers peace of mind that if anything goes wrong later down the line, our team will be more than happy to return and attend to any issues.

Book a Prokil ventilation survey today to protect your property and maintain healthy, compliant indoor air.

Signs You May Require a Ventilation System Include

  • Condensation on windows, particularly in the morning
  • Musty smells or black mould in corners or behind furniture
  • Peeling paint, bubbling plaster, or damp patches on walls
  • Worsening allergy or asthma symptoms indoors
  • Persistent humidity in kitchens, bathrooms, or bedrooms

If you notice any of these signs, it’s a good idea to book a professional damp and ventilation survey. Our intervention will help pinpoint the best solution for your property.


How Our Ventilation Process Works

Every property is unique, so our team will begin with a detailed inspection to evaluate moisture levels and airflow patterns. This enables us to recommend the best system based on technical findings, rather than relying on guesswork or sales incentives.

Following your survey, our specialists will suggest the most suitable form of ventilation for your home or building.

This may include:

  • Passive Ventilation Units (PVUs)
  • Positive Input Ventilation (PIV)
  • Positive Output Ventilation (POV)
  • Extractor Fans

Each recommendation is tailored to your property’s layout, use, and moisture profile.

All Prokil installations comply with current building regulations. Our systems are installed with minimal disruption and delivered with clarity, care, and compliance at their core. From the initial assessment to aftercare, we help stop damp, mould, and condensation from returning.

What We Offer & Why It Works

At Prokil, we provide expert installation of systems that comply with regulations. Our solutions control condensation, reduce humidity and resolve damp and mould problems. Each installation is based on a moisture diagnosis carried out by a certified specialist.

As condensation specialists, we focus on diagnosing the root causes of issues. We don’t just offer temporary fixes, as our goal is to help you solve moisture problems for the long term.

We collaborate with homeowners, landlords, and housing providers in the South of England. Our goal is to deliver long-term solutions that comply with regulations. We customise these solutions based on each property’s structure, usage, and moisture levels.

The top three benefits of our systems:

  • Prevents long-term damp, decorative damage, and timber decay
  • Improves indoor air quality and protects occupant health
  • Installed by experienced engineers and backed by a 20-year Prokil guarantee

Our recommendations are evidence-led and aligned with British Standards and Approved Document F ventilation requirements. Each solution is selected for performance, suitability, and durability.

Passive Ventilation Units (PVUs)

Also known as passive air vents, these systems provide continuous ventilation. They help lower moisture levels without using energy.

  • No electricity is required, making them silent and energy-efficient
  • Installed discreetly through external walls in affected rooms
  • Ideal for retrofits and properties needing low-impact intervention

Positive Input Ventilation (PIV)

PIV systems work by supplying filtered air into the home from the loft or an external wall, gently displacing damp indoor air.

  • It helps prevent condensation by reducing relative humidity
  • Improves indoor air quality with continuous airflow
  • Suitable for whole-house solutions in both houses and flats

Positive Output Ventilation (POV)

POV systems draw moist air through a central unit connected to multiple extraction points around the property.

  • Designed for airtight, energy-efficient homes with restricted airflow
  • Continuously removes excess humidity from multiple rooms
  • It helps prevent structural issues caused by long-term condensation

Extractor Fans

Extractor fans are a standard solution for areas prone to high humidity, such as kitchens and bathrooms.

  • Available in timed or humidity-sensitive models for tailored control
  • Expels moist air directly outside to prevent localised damp
  • Compliant with building ventilation regulations for wet rooms

Protect Your Property with Proven Ventilation

Damp and mould are indicative of ventilation issues. If left unaddressed, they can cause structural damage and harm your health. With over 50 years of experience, Prokil provides qualified, survey-led solutions. Our team always directly address excess humidity at its source.

We support homeowners and commercial property managers with guidance focused on long-term protection. Recommendations are based on detailed survey findings, building use, and airflow requirements. All systems meet British Standards to ensure reliable performance, comfort, and compliance with regulations.

Call 0800 048 9488 or book your Prokil ventilation survey online today.


Book a survey today

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What to expect from your survey

1

Book a survey

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

2

Our experts give a quote

One of our damp & timber experts will arrive to survey the work.

3

We complete the work

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