Room in Roof Insulation Perth

If your converted loft room is freezing in winter and roasting in summer, or your heating bills are being driven up by heat escaping through the roof space you actually live in, the conversion was probably done without proper insulation. Room in roof insulation fits insulated boards to the sloped ceilings and dwarf walls of converted loft spaces, dormer rooms and attic bedrooms, fixing exactly that.

An HES grant of up to £3,000 is available towards the cost, subject to an eligibility check. We’re TrustMark and PAS2030 registered.

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Is room in roof insulation right for your home?

Most people think of loft insulation as rolls laid between joists in an empty loft. Room in roof insulation, one of our four insulation types, is different: it insulates the sloped ceiling, gable walls and any dwarf walls of a loft that’s already been converted into a living room, bedroom or office. If you walk into your loft space and use it as a room, this is the insulation type you need, not standard loft insulation.

This suits homes with converted loft rooms or attic bedrooms, dormer extensions where the ceiling follows the roofline, and any room with sloped ceilings that feels noticeably colder than the rest of the house. It’s especially common where the original loft conversion didn’t include proper insulation, or where what’s there has thinned or degraded over time.

Heat loss through the roof is usually the biggest single source of heat loss in a home, and a room sitting directly under uninsulated rafters loses heat fast in winter and gains it just as fast in summer. Insulated boards fitted between and over the rafters fix both problems.

Room in roof insulation installation, Perth home

What’s involved in the installation

We start with a survey of the roof space. We check rafter depth and condition, work out what ventilation is needed, and identify anything that needs resolving before the boards go in.

Rigid insulation boards are fitted between and over the rafters, then finished with plasterboard. Dwarf walls, the short vertical walls where the roof meets the floor, and any gable walls are insulated at the same time. The room itself is out of use while we work, but the rest of your house isn’t affected. A single room typically takes a few days, depending on the size and complexity of the roof space.

Grant support may be available. HES offers a grant of up to £3,000 plus a £1,000 interest-free loan (verified 4 August 2026), subject to an eligibility check, with energy-efficiency grants covering up to 75% of combined cost, capped at £7,500. There’s a further £1,500 rural uplift where applicable. An EPC is required, and funding is based on your property rather than your income. You manage the HES application yourself; we’ll help you through it.

Insulation batten system being fitted, Perth home

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Why choose us for your room in roof insulation

We’re TrustMark registered, required for HES-funded insulation work, and PAS2030 accredited (since 2021), the standard for government-funded energy efficiency work.

This work is fully backed by our Qualitymark guarantee: a 25-year system guarantee and a 2-year workmanship guarantee, both insurance-backed. Our team carries over 80 years of combined trade experience, and we hold public liability, employers’ liability and professional indemnity insurance.

We’re based in Perth and cover the city and wider Perthshire. Older housing stock across the area has a high proportion of loft conversions that were done without adequate insulation, and it’s something we see regularly.

What we provide for our customers:

PAS2030 Certified for Government Funded Work

Trustmark Registered and Independently Audited

Internal Wall, Room in Roof, Loft and Underfloor

25 Year System Guarantee Backed by Quality Mark

SWIP and Wetherby Accredited Installers

Trustmark Registered, as Grant Funded Work Requires

Perth-based, Not a National Call Centre

Waste Removed and Disposed Of Properly

FAQs

What is room in roof insulation?

It’s insulation for loft spaces that have been converted into living rooms, bedrooms or offices. Rather than insulating a flat ceiling below an empty loft, it insulates the sloped ceiling and dwarf walls of the room itself. If you live in the loft space day to day, this is the insulation type you need.

Can I get a grant for room in roof insulation?

Yes. HES offers a grant of up to £3,000 plus a £1,000 interest-free loan (verified 4 August 2026), subject to an eligibility check. It’s based on your property rather than your income, and you’ll need an EPC. You manage the application yourself and we’ll support you through it. See our Home Energy Grants page for the full detail.

How is it different from loft insulation?

Standard loft insulation sits as rolls of mineral wool between the ceiling joists of an empty, unused loft. Room in roof insulation goes between and over the rafters instead, insulating the sloped ceiling of a room you’re already living in. The method, the materials and the grant level are all different.

How much does room in roof insulation cost?

It varies with the size and complexity of the roof space. The HES grant covers up to £3,000, so for many eligible properties the out-of-pocket cost is significantly reduced, subject to an eligibility check. We provide a free survey and quote.

Will I lose ceiling height?

A small amount, yes. The insulation boards and new plasterboard add a little thickness below the rafters. For most conversions this is minimal, but it’s worth knowing about. We’ll assess this during the survey and talk it through before any work starts.

Do you insulate homes in my area?

Yes, across Perth and Perthshire. Loft conversions are common across the area’s older housing stock, in Oakbank, Craigie and Perth City Centre as well as the wider Perthshire settlements. If you’re not sure your area’s covered, just ask.

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Save up to £420* on your energy bill annually by upgrading to a modern, efficient boiler.

*Figure from the Energy Saving Trust, based on replacing a G-rated boiler with no heating controls with a new A-rated condensing boiler fitted with a programmer, room thermostat and thermostatic radiator valves (TRVs), in a gas-heated home in Great Britain. Savings will vary depending on the size and thermal performance of your home.

Figures reflect the Energy Saving Trust's estimates as published May 2026.