Tailored Insulation, Expertly Guided
Greener living for every self-build vision
Insulation is the cornerstone of a comfortable, energy-efficient home. At Fleming Homes, we provide bespoke high-performance insulation solutions, offering the flexibility to meet your unique project needs and sustainability goals.
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Whole House
Insulation U-values
Whole House
Insulation U-values
External Walls
120mm PIR + 50mm PIR
0.11W/m²K
120mm PIR and 25mm PIR
0.12W/m²K
140mm Frametherm 35 + 50mm PIR
0.13W/m²K
Attic Upright Walls
120mm PIR + 50mm PIR
0.13W/m²K
120mm PIR + 25mm PIR
0.15W/m²K
140mm Frametherm 35 + 50mm PIR
0.14W/m²K
Horizontal Ceiling
2 Layers Loft Roll 44 (England only)
0.14W/m²K
3 Layers Loft Roll 44
0.10W/m²K
Sloping Ceiling
140mm PIR + 50mm PIR
0.13W/m²K
140mm PIR + 25mm PIR
0.15W/m²K
External Doors (Rationel)
Double Glazed Doors
up to 1.29 W/m²K
Triple Glazed Doors
up to 0.84W/m²K
Windows (Rationel)
Double Glazed Windows
up to 1.28W/m2k
Triple Glazed Windows
up to 0.77W/m2k
Sound insulation
Mid-Floor
100mm Sound Deadening Insulation
43dB Rw
Internal Walls
100mm Sound Deadening Insulation
40dB Rw
Hands-On Flexibility
0.13W/m²K
Looking to save on costs while achieving better thermal performance? This option is perfect for self-builders who are comfortable adding extra layers on-site.
A practical option for hands-on builders who want to maximize efficiency and minimize costs.
Key Features
Layered Insulation
Includes site fitted 140mm FrameTherm® roll 35 and a 50mm PIR rigid insulation layer.
Vapour & Airtight Barrier
Protect VC reflective foil ultra for thermal performance.
Service Void
45mm battens provide space for easy service installations.
Performance
Achieves a U-value of 0.13W/m²K (with an external masonry leaf).
Mid-Level Energy Efficiency
0.12W/m²K
A balanced choice for those seeking solid energy performance at a lower price point. This factory-fitted option offers reliable insulation with less on-site labour, making it ideal for budget-conscious builds.
Key Features
Layered Insulation
Factory-fitted 120mm PIR rigid insulation and a 25mm PIR rigid insulation layer.
Vapour & Airtight Barrier
Protect VC reflective foil ultra for enhanced efficiency.
Service Void
45mm battens provide space for easy service installations.
Performance
Achieves a U-value of 0.12W/m²K (with an external masonry leaf).
Premium Energy Efficiency
0.11W/m²K
Designed for those who prioritise long-term energy savings, this high-performance option uses multiple insulation layers to deliver exceptional results. A top-tier choice for fabric-first homes.
Key Features
Layered Insulation
Factory-fitted 120mm PIR rigid insulation and a 50mm PIR rigid insulation layer for exceptional thermal performance.
Vapour Control Layer & Airtight Barrier
Protect VC reflective foil ultra for enhanced efficiency.
Service Void
45mm battens provide space for easy service installations.
Performance
Delivers a U-value of 0.11W/m²K (with an external masonry leaf).
Why Choose Fleming Homes for Insulation?
Tailored Solutions
Bespoke insulation specifications adapted to your design, materials, and energy goals.
Sustainability First
Choose eco-friendly options like sheep’s wool, wood fibre, or hemp.
Energy Efficiency
Lower energy bills with solutions designed to minimize heat loss.