Sustainable modular homes start with the envelope
For sustainable modular homes the envelope comes first. Non-combustible to Class A1, from 100 mm up to 200 mm within the frame plus a 50 mm counter-insulated layer that breaks the thermal bridge through the studs. A breather membrane outside the insulation and a vapour control membrane inside it, so the build-up manages moisture in both directions across the life of the building.
100 mm
External wall insulation: 100 mm
Our standard envelope, suited to garden rooms, studios and seasonal or holiday use.
150 mm
External wall insulation: 150 mm
A step up in thermal performance, appropriate for year-round occupation in the UK climate.
200 mm
External wall insulation: 200 mm
A deeper frame and insulation layer for permanent homes where running costs matter most.
250 mm
External wall insulation: 50 mm + 200 mm
Our warmest specification: 200 mm within the frame plus a 50 mm counter-insulated layer that breaks the thermal bridge through the studs.
Every element at every thickness is on the technology page.
The heat pump is in the Turnkey base scope
Everything in Option 2, plus helical ground screw foundation, floor panels, plasterboard tape-and-joint and paint, LVT flooring, one standard bathroom, internal doors, staircase where applicable, basic electrics, plumbing and air-source heat pump, compliance, testing and handover. Kitchen, underfloor heating, MVHR, PV and upgraded finishes priced separately.
Full prices for every model and option are in the price guide.
Energy efficient prefab extras: the comfort and energy upgrades
- Underfloor heating
- MVHR ventilation
- Solar PV + battery
- Extended warranty
Quoted per project. Kitchen, underfloor heating, MVHR, PV and upgraded finishes are priced separately.
Eco modular home UK buyers can check: less waste from the factory
Factory-controlled manufacture reduces waste, improves quality and shortens on-site programmes, and the controlled production environment reduces weather dependency. Panels arrive with insulation, sheathing, membranes and cladding already in place.
Designed for year-round use
All Trident buildings are designed for year-round use with full insulation, heating and ventilation, and to meet or exceed current Part L requirements. The 150 mm specification is the one we describe as appropriate for year-round occupation in the UK climate.
Further reading
10 Ways Energy-Efficient Modular Homes Support Sustainable Living
Discover 10 powerful ways energy-efficient modular homes are revolutionizing sustainable living. Learn how modern homeowners can save energy, reduce costs, and embrace eco-friendly solutions
The Role of Modular Construction in Meeting Sustainability Goals
Discover how modular construction is leading the way in sustainable building practices by reducing waste, lowering carbon emissions, and enhancing energy efficiency to meet global sustainabi
Sustainable and Bespoke Options for Your Modular Home
Explore green roofs, solar panels, heat pumps and bespoke design services available for Trident Modular homes, garden rooms and annexes.
Common questions
Which insulation thickness should I choose?
100 mm: Our standard envelope, suited to garden rooms, studios and seasonal or holiday use. 150 mm: A step up in thermal performance, appropriate for year-round occupation in the UK climate. 200 mm: A deeper frame and insulation layer for permanent homes where running costs matter most. 250 mm: Our warmest specification: 200 mm within the frame plus a 50 mm counter-insulated layer that breaks the thermal bridge through the studs.
Is the insulation fire-safe?
Non-combustible to Class A1, from 100 mm up to 200 mm within the frame plus a 50 mm counter-insulated layer that breaks the thermal bridge through the studs.
Does Turnkey base include a heat pump?
Yes. Everything in Option 2, plus helical ground screw foundation, floor panels, plasterboard tape-and-joint and paint, LVT flooring, one standard bathroom, internal doors, staircase where applicable, basic electrics, plumbing and air-source heat pump, compliance, testing and handover. Kitchen, underfloor heating, MVHR, PV and upgraded finishes priced separately.
How is moisture managed inside the walls?
A breather membrane outside the insulation and a vapour control membrane inside it, so the build-up manages moisture in both directions across the life of the building.
More answers on the full FAQ page.
Specify the envelope and the extras
Tell us the model and the site, and which of the energy options you want priced alongside it.