Pitched roof insulation helps reduce heat loss through your roof by insulating between or under the rafters. It improves indoor comfort, supports better energy efficiency and can help lower heating bills for Manchester homes.
Pitched roofs lose significant heat through poorly insulated loft spaces. Pitched roof insulation — installed between or under rafters — keeps your home warmer and reduces energy bills.
Reduce heat loss through the roof — typically saving around £200–£400 per year on heating, depending on your property and usage.
Consistent temperatures throughout your home — no more cold rooms or draughts from upstairs rooms.
Eligible homeowners may receive fully funded pitched roof insulation — the ECO4 scheme runs until 31 December 2026, and eligibility is income- and benefits-linked.
Properly installed insulation with the right ventilation prevents roof space condensation, protecting timbers from rot.
Insulation installed between roof rafters, leaving rafter depth visible. Suitable for lofts used for storage or occasional access. Requires 100–150mm rafter depth.
A continuous insulation layer installed across (below) the rafters, eliminating thermal bridging. Best for loft conversions or habitable spaces — reduces room height by around 50–100mm.
Maximum thermal performance — both between and under rafters, typically achieving U-values as low as around 0.15 W/m²K. Best for the highest energy efficiency.
Choosing the right insulation material for pitched roofs is essential for thermal performance, moisture control, and long-term durability. The choice depends on whether insulation is installed between rafters, under rafters, or in combination.
Best for: between and under rafters · Typical U-value: 0.18–0.22 · Typical thickness: 50–150mm
Excellent thermal efficiency in a slim profile — ideal for modern pitched roof upgrades where space is limited and high performance is required.
Best for: between rafters (cost-effective) · Typical U-value: 0.22–0.30 · Typical thickness: 100–200mm
Widely used for its affordability, fire resistance, and acoustic benefits — most suitable for standard loft upgrades.
Best for: under-rafter high-performance systems · Typical U-value: 0.15–0.18 · Typical thickness: 50–100mm
One of the best thermal performances available, achieving high efficiency with minimal thickness — ideal for space-restricted roof designs.
Best for: complex roof shapes and hard-to-access areas · Typical U-value: 0.18–0.25
Expands to fill gaps and irregular spaces, creating an airtight seal — useful for older or uneven roof structures. A note of caution: some mortgage lenders and surveyors scrutinise spray foam in roof spaces, so we only recommend it where genuinely appropriate, with full specification and documentation provided.
Without proper ventilation, condensation causes damp and rot in roof timbers. We assess and design appropriate ventilation for your roof type.
The cost depends on the property type, roof size, insulation method, and whether insulation is installed between or under rafters. Many households may qualify for ECO4 funding — eligibility is income- and benefits-linked — which can significantly reduce or fully cover installation costs.
| Property type | Indicative cost | ECO4 funding | Your cost if fully funded | Best for |
|---|---|---|---|---|
| Terraced house | £800–£1,500 | Up to 100% if eligible | From £0 | Victorian & Edwardian terraces |
| Semi-detached house | £1,000–£2,000 | Up to 100% if eligible | From £0 | Medium-sized family homes |
| Detached house | £1,500–£3,000 | Up to 100% if eligible | From £0 | Larger homes with higher heat loss |
Choosing the right installer for pitched roof insulation is essential to ensure proper ventilation, energy efficiency, and long-term roof performance. We deliver fully compliant, high-quality insulation systems designed specifically for UK housing stock.
We carefully assess roof ventilation to prevent condensation, damp buildup, and timber decay — proper airflow design ensures your insulation works efficiently without trapping moisture.
We manage the full ECO4 process — eligibility checks, documentation, and application support — helping eligible homeowners access fully funded or subsidised insulation upgrades.
We only use certified, BBA-approved insulation materials that meet UK Building Regulations — for long-term durability, thermal efficiency, and compliance.
All work is carried out by trained professionals with a focus on accuracy, safety, and compliance — insulation correctly fitted between or under rafters for maximum performance.
A no-obligation property assessment to evaluate your roof structure and recommend the most suitable insulation system for your home.
Between-rafter insulation fits between the existing rafters, leaving the rafters themselves as small thermal bridges. Under-rafter insulation is a continuous layer across the rafters, eliminating thermal bridging and providing better overall performance.
Yes. Proper ventilation prevents condensation and rot — we assess and design the right ventilation for your roof type as part of every installation.
With between-rafter insulation, yes — storage remains possible on the ceiling joists. With under-rafter insulation, room height is slightly reduced, but the whole space becomes usable as a habitable area.
You may qualify if you receive qualifying benefits or meet ECO4 Flex criteria through your local authority — ECO4 runs until 31 December 2026. Contact us for a free eligibility check.
Book your free consultation today — or simply contact us to discuss your pitched roof insulation project.
