Vaulted Roof Detail
Trusses and Joists from MBC
The Cut or Vaulted Roof is an engineered system that provides open living space directly below the roof rafters as there are no horizontal ceiling joists. The MBC cut / vaulted roof rafters utilise open metal web posi joists set at a predetermined angle or pitch to achieve the cut / vaulted roof structure. The open metal web posi joist sees parallel timber flanges that are plated together with an engineered steel web component. The steel webs are plated in a ‘V’ formation, providing a lightweight structural roof joist that can span greater distances in comparison to a standard solid joists. Insulation is fitted by MBC running up the slope of the cut roof joist.
Vaulted Roof 0.14 W/m2K U-Value
All items supplied and fitted by MBC
- 25mm x 50mm Counter Batten
- Roof Membrane
- 325mm Rafter
- 325mm Cellulose Insulation fitted to sloped portion of engineered cut rafter
- VCL / Airtight Membrane to achieve below 3.0 AC/HR or better
- 25mm Service Cavity Batten
Discuss your project with us
MBC specialise in the production of Timber Frame Passive Houses and High Thermal Efficiency Timber Frame Houses throughout the UK, for people looking to benefit from huge energy savings and reduce their heating demands by up to 90%.
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.
The MBC Passive Foundation system, suitable for both Passive and Standard timber frame projects.