07946 209052hlee-sonroofing@outlook.com 12 Yeovil Road, Sandhurst GU47 0TEOpen 24 hours, 7 days a week HomeAboutServicesOur WorkAreasReviewsContactGet a Free QuoteMenu - Home - Services - Loft Insulation Loft insulation · fitted with the roof # Sandhurst’s TrustedLoft Insulation Specialists Insulation supplied and fitted by roofers, so ventilation, eaves detail and the roof covering above are all considered together. Heat stays in the rooms instead of escaping through the roof space, and the loft stays dry rather than turning into a condensation problem. Get my free quotation07946 209052 Fitted alongside roof works · free survey · 100% satisfaction guarantee - Installed by qualified roofing teams - Eaves ventilation protected, not blocked - 15 years' experience across Berkshire & Surrey - Fully insured, work photographed - 100% satisfaction guarantee The service ## Insulation Done as Part of the Roof, Not Separately Heat rises, and an under-insulated roof space is the largest single escape route in most houses. Upgrading loft insulation is one of the cheapest ways to reduce heat loss, but it only works properly when the rest of the roof is set up to cope with it, which is exactly why we fit it alongside roofing work rather than treating it as an unrelated product. The reason is simple. Better insulation makes the loft colder, because less heat leaks into it. A colder loft is more likely to see condensation forming on the underside of the roof unless the ventilation path at the eaves is open and working. Insulation stuffed tight into the eaves blocks that path, and the result is damp timber, wet insulation and mould in a roof that never leaked. We survey the roof space, check the existing depth and condition, confirm ventilation and eaves detail, deal with any damp already present, and install insulation to a consistent depth with the ventilation path preserved. Where a re-roof, roofline renewal or repair is also happening, it is all handled by the same team on the same visit. ### Who benefits most - Older properties with thin, compressed or patchy insulation laid decades ago - Homes with cold upstairs rooms and rising heating costs - Anyone re-roofing or renewing roofline, where access and ventilation can be corrected at the same time - Lofts where insulation has been disturbed by storage, cabling work or previous trades - Properties with signs of condensation, where insulation and ventilation need addressing togetherBook a free site visit If it is left ## The Cost of Leaving the Loft as It Is Poor insulation shows up every month on the heating bill, and it never stops. Warm air escapes through the ceiling, the boiler works harder for the same room temperature, and in cold spells the upstairs rooms are the ones nobody wants to sit in. Damp insulation is worse than none. Wet mineral wool loses most of its performance, holds moisture against joists and ceiling boards, and takes a long time to dry in an unventilated space. If a roof leak, a blocked gutter or condensation has been soaking the loft, adding more insulation on top simply buries the problem. The subtler risk is condensation caused by getting the sequence wrong. Insulating well while blocking eaves ventilation produces the classic symptoms, black mould on the underside of the roof, damp patches at the ceiling line, water marks that appear in cold weather rather than during rain. Fixing that afterwards costs far more than doing it in the right order once. ### Common mistakes in the loft - Packing insulation hard into the eaves and sealing off the airflow the roof needs - Laying new insulation over wet, mouldy or compacted material instead of removing it - Insulating over recessed downlights and cables without allowing for heat build-up - Boarding a loft for storage by squashing the insulation flat, removing most of its value - Insulating a roof space that has an active leak, so the new material is soaked within weeks How we work ## Our loft insulation process The same sequence on every job, from the first call to the photographs at the end. - Step 1 ### Loft survey We inspect existing insulation depth and condition, check for damp, look at the underlay, timbers and ventilation path, and photograph what is there. - Step 2 ### Diagnosis and quotation You get a straight assessment, including anything on the roof that must be fixed first, and a free written price with no obligation. - Step 3 ### Preparation and remedial work Wet or contaminated material is removed, any leak is dealt with, and the eaves ventilation path is opened up and protected. - Step 4 ### Insulation installed Insulation is laid to a consistent depth, worked carefully around joists, cables, downlights and services, and kept clear of the eaves airflow. - Step 5 ### Check, tidy and guarantee We confirm coverage and ventilation, clear the loft hatch area and the site, hand over photographs, and back the work with our 100% satisfaction guarantee. What you get ## Why customers choose us for loft insulation ### Lower heat loss, immediately A properly insulated roof space reduces the heat escaping through the ceiling from the first cold night onwards. ### Warmer upstairs rooms Bedrooms stop feeling several degrees colder than the rest of the house, which is usually the first thing people notice. ### Condensation risk controlled Ventilation is preserved rather than blocked, so a better-insulated loft does not become a damp loft. ### Done with the roof, not around it Fitted alongside re-roofing, repairs or roofline work, with one team and one visit rather than a separate contractor. ### Problems found before they are buried Roofers in the loft spot leaks, perished underlay and ventilation faults before new insulation hides them. ### A dry, usable roof space Correct depth, correct coverage and a clear airflow path leave the loft in a condition you can actually use. In detail ## Materials, Depths and Roof Types What goes into a loft depends on how the roof is built and how the space is used. ### Cold loft insulation at ceiling level The standard arrangement in most houses across Berkshire and Surrey is insulation laid at ceiling level, between and then across the joists in two layers so the joists themselves do not act as cold bridges. Depth and consistency matter more than product branding: patchy coverage and gaps around the hatch and the perimeter undo a lot of the benefit. ### Warm roof and room-in-roof situations Where a loft has been converted or a flat roof covers a habitable room, insulation moves into or above the roof structure instead of the ceiling. This is a different build-up with different condensation considerations, and it is usually dealt with as part of the roof covering works rather than as a separate insulation job. ### Ventilation, eaves trays and the airflow path Eaves ventilation, ventilated soffits and, where appropriate, ridge ventilation form the airflow route that keeps a cold loft dry. Insulation must stop short of blocking that path. On roofs with older bitumen underlay this is even more important, since the underlay itself is not breathable and relies entirely on ventilation to disperse moisture. ### Storage, boarding and services If the loft is used for storage, boarding must be raised above the insulation rather than compressing it, or you lose much of what you paid for. Water tanks and pipework in the loft need insulating themselves once the space runs colder, and recessed lighting and cabling need appropriate clearance. ### Domestic and commercial applications Domestic loft insulation is the common case. On commercial and outbuilding roofs the insulation strategy is usually part of the roof build-up itself. Either way we survey the roof and the space together, because insulation performance is decided by the whole assembly, not by one layer. ### Areas we cover for loft insulation - Sandhurst - Owlsmoor - Crowthorne - Blackwater - Yateley - Camberley - Bracknell - Wokingham - Farnborough - Fleet - Frimley - AscotBased at 12 Yeovil Road, Sandhurst GU47 0TE, working across Berkshire, Surrey, Hampshire and everywhere else within roughly a 50-mile radius. See all of the towns we cover. Common questions ## Loft Insulation, your questions answered If your question is not here, call Henry Lee and the team on 07946 209052. Open 24 hours, 7 days a week. - See all roofing services - H Lee & Son Roofing homepage - Contact us for a free quotation How much does loft insulation cost?It depends on the floor area of the loft, the existing insulation, access and whether any remedial work is needed first. The survey and written quotation are free and carry no obligation. How long does the job take?Most domestic lofts are completed within a day, or alongside other roofing works on the same visit. Should I remove the old insulation?Not always. Sound, dry material can usually be topped up. Wet, mouldy or heavily compacted insulation should be removed rather than covered over. Will more insulation cause condensation in my loft?Only if ventilation is neglected. A better-insulated loft runs colder, so the eaves airflow path has to stay open. We check and protect ventilation as part of the installation. Can you insulate if my roof leaks?We fix the roof first. Laying insulation into a loft that is still taking water simply ruins the new material and hides the leak. Can I still store things in the loft afterwards?Yes, but boarding should be raised above the insulation so it is not crushed. We will explain the options during the survey. How long does loft insulation last?Kept dry and uncompressed, it performs for many years. The things that shorten its life are water and being walked on or squashed under boarding. Do you do this alongside a new roof?Yes, and that is the ideal time. Access is available, ventilation can be corrected, and the covering above is known to be sound. Is the work guaranteed?All of our work is backed by our 100% satisfaction guarantee, and the job is photographed before, during and after. Which areas do you cover?Sandhurst, Owlsmoor, Crowthorne, Blackwater, Yateley, Camberley, Bracknell, Wokingham, Farnborough, Fleet, Frimley, Ascot and the surrounding area within roughly 50 miles. ## Related services ### Gutters, Fascias & Soffits Expert uPVC roofline installation in a wide range of colours and styles, with ventilated soffits that keep air moving through the roof space. It stops… View service→ ### New Roofs A complete re-roof from a family-run contractor with 15 years on Berkshire and Surrey roofs and 255+ installations behind it. You get a free survey, a… View service→ ### Roof Surveys & Inspections A straight assessment from a working roofing contractor: what needs doing now, what can safely wait, and a written price for both. Photographed throug… View service→ Free, no-obligation quotation ## Stop Paying to HeatYour Roof Space A free loft survey, an honest view of what is up there now, and insulation fitted by roofers who will not block the ventilation your roof depends on. - 07946 209052 - hlee-sonroofing@outlook.com - Open 24 hours, 7 days a week, including emergencies - Fully insured teams · 100% satisfaction guarantee ### Request your free quotation Takes under a minute. No obligation, no pressure. Family-run roofing contractor based in Sandhurst, covering Berkshire, Surrey, Hampshire and surrounding areas within a 50-mile radius. Domestic and commercial. ### Contact - 07946 209052 - hlee-sonroofing@outlook.com - 12 Yeovil Road, Sandhurst, GU47 0TE - Open 24 hours, 7 days a week ### Services - New Roofs - Roof Repairs - Flat Roofs - Roof Cleaning - Gutter Cleaning - Gutters, Fascias & Soffits - Loft Insulation - Exterior Painting - Chimney Repairs & Repointing - Leadwork & Flashing - Roof Surveys & Inspections ### Areas covered - Sandhurst - Owlsmoor - Crowthorne - Blackwater - Yateley - Camberley - Bracknell - Wokingham - Farnborough - Fleet - Frimley - Ascot © 2026 H Lee & Son Roofing Services Limited. All rights reserved. Cookie PolicyPrivacy PolicyTerms & ConditionsFree, no-obligation quotations · 100% satisfaction guarantee Call nowFree quote We use essential cookies to run this site, plus optional cookies for our enquiry form and chat. See our cookie policy. AcceptEssential only