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Roof Insulation and Ventilation in Kent

Insulation without ventilation causes condensation, and condensation rots the timbers it collects on. The two have to be specified together.

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Warm roofs that breathe properly

Insulation and ventilation have to be specified together. Adding one without the other causes the problem people usually call us about.

Warm moist air from the house rises into the roof space. If there is not enough ventilation at the eaves and the ridge to carry it away, it condenses on the cold underside of the felt and drips back onto the insulation below. The result looks exactly like a leak, in a roof that is not leaking at all, and over time it rots the timbers it collects on.

Adding more insulation without opening up the ventilation path makes it worse, because the roof space gets colder. Current guidance is around 270mm of mineral wool at ceiling level, but it has to stop short of blocking the eaves, and it must not be compressed, because compressed insulation loses most of its value.

What We Do

Common Roof Insulation and Ventilation Jobs We Handle

  • Loft insulation top-ups

  • Insulation at rafter level for warm roofs

  • Ridge, eaves and soffit ventilation

  • Rafter trays to keep the eaves airway clear

  • Diagnosing condensation and black mould

  • Upgrading to a breathable membrane

Why book with us

Why Choose Us for Roof Insulation and Ventilation

  • Fast, Responsive Callouts

    We respond quickly across Kent and Medway, because a leaking roof does not wait. Emergency repairs are made safe first and finished properly afterwards, so a small problem never becomes a structural one.

  • Experienced, Skilled Roofers

    Work is carried out by approved Kent-based roofing specialists who have worked on local housing stock for years, from Victorian slate and clay pantiles to modern flat roofing systems. The right material, fixed the right way.

  • Insured Providers, Tidy Sites

    Every approved roofing specialist is fully insured and appropriately qualified for the work they take on, and is expected to leave your property as they found it, with scaffolding signed off and waste cleared.

  • Clear Pricing With No Hidden Costs

    You get a written quote before any work begins, with the materials and the scope set out plainly. If something unexpected is found under the tiles you are told first and it is agreed with you before it goes ahead.

  • A Complete Range of Roofing Work

    Pitched and flat roofing, repairs and emergency leaks, chimney repointing, leadwork and flashing, guttering, fascias and soffits, roof cleaning, and solar. One team, one point of contact.

  • Trusted Across Kent and Medway

    We cover Gravesend, Medway, Maidstone, Canterbury, Ashford and the surrounding towns across Kent and Medway. Much of the work comes through repeat customers and recommendations from neighbours.

Sunlit street of red brick Victorian terraced houses in Kent with slate roofs and brick chimney stacks under a clear blue sky

We’re Here To Help

Your Common Roof Insulation and Ventilation Questions Answered

Almost always condensation rather than a leak. Warm moist air from the house rises into a cold roof space, and if there is not enough ventilation at the eaves and ridge it condenses on the underside of the felt and drips onto the insulation. Adding insulation without ventilation makes it worse, not better.

Current guidance is around 270mm of mineral wool at ceiling level. Just as important is that it does not block the ventilation path at the eaves, and that it is not compressed, because compressed insulation loses most of its value.

Local coverage, county-wide reach

Areas We Cover Across Kent

Ready To Help With Your Roof

Need A Trusted Local Roofer?

We provide roofing for homeowners, landlords and businesses across Kent. Whether it is a slipped slate, a leak that needs making safe today, a chimney that needs repointing or a complete re-roof, you get a clear written quote before any work starts.

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