Passive House
Passive Roof
Passive Roof Systems | MBC Timber Frame
All MBC Passive Roof Systems deliver a U-Value of 0.10W/m2K. The main diagram below shows how the three Passive elements (Roof, Wall and Foundation) link together.
The individual roof type diagrams show the detail associated with each roof type: Fink Truss, Attic Truss, the Vaulted Roof and the Flat Roof.
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Vaulted Roof 0.10 W/m2K U-Value
All items supplied and fitted by MBC
- 25mm x 50mm Counter Batten
- Roof Membrane
- 400mm Rafter
- 400mm Cellulose fitted to sloped portion of engineered cut rafter
- VCL / Airtight Membrane to achieve below 0.6 AC/HR or better
- 25mm Service Cavity Batten
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Fink Truss Roof 0.10 W/m2K U-Value
All items supplied and fitted by MBC
- 25mm x 50mm Counter Batten
- Roof Membrane
- Roof Truss
- 400mm Cellulose Insulation to flat bottom chord portion of truss
- VCL / Airtight Membrane to achieve below 0.6 AC/HR or better
- 25mm Ceiling Service Cavity Batten
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Attic Truss Roof 0.10 W/m2K U-Value
All items supplied and fitted by MBC
- 400mm Cellulose Insulation to sloped portion of truss
- 25mm x 50mm Counter Batten
- Roof Membrane
- Attic Truss
- VCL / Airtight Membrane to achieve below 0.6 AC/HR or better
- 25mm Ceiling Service Cavity Batten
- 22mm Caberdek Flooring
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Flat Roof 0.10 W/m2K U-Value
All items supplied and fitted by MBC
- 50mm min firring piece
- 11mm OSB3 Deck
- 400mm Cellulose Insulation
- Engineered MiTek posi joists at centres specified by structural engineer
- VCL / Airtight Membrane to achieve below 0.6 AC/HR or better
- 25mm Service Cavity Batten
- *Minimum 50mm firring pieces required to ensure ventilation to insulated flat roof system
Discuss your project with us
MBC specialise in the production of Timber Frame Passive House Buildings and High Thermal Efficiency Timber Frame Houses throughout the UK, Fulfil your dream of a self built home and benefit from huge energy savings and reduce their heating demands by up to 90%.
Passive Builds
Precisely engineered Passive solutions from MBC Timber Frame requiring 90% less energy for space heating and cooling.
Near Passive Builds
MBC Timber Frame’s “optional levels of insulation” applied to a 140mm stud frame. 3 great options delivery differing U-Values.
Passive Foundations
The MBC Passive Foundation system, suitable for both Passive and Standard timber frame projects.
Truss and Joists
Metal web Joists and Roof Trusses available on a supply only basis for traditional build projects.