Twin Wall (Passive) System
Stylish Design Features
High levels of comfort
90% less energy
If you’re considering a PASSIVE build
Take a look at our Twin Wall System
For many, the dream of designing and building their own Passive House is the culmination of years of planning and exciting thinking. With MBC Timber Frame, the reality of a Passive House, bringing together all of the design features and high levels of comfort associated with this approach, is now not only a possibility but an incredibly cost effective possibility.
A Passive House is a precisely engineered and detailed structure that is highly insulated, cold bridge free and requires 90% less energy for space heating or cooling. Building a Passive House does not cost extra in the long term as there is no need to install a complex heating system. Finances saved are invested into essential Passive House Elements, the cost of which is quickly recouped within a few years of building completion
A Passive House is fitted with a variety of non structural high performance essential elements, which include:
- Triple gazed windows
- Thermal Insulation barrier
- Airtight membrane and tapes
- Mechanical Ventilation and Heat Recovery (MVHR)
Passive House Components
The MBC Passive Foundation
MBC’s passive foundation is a PassiveHaus certified system, designed to thermally encase the foundation in high performance expanded polystyrene (EPS)…
The MBC Passive Wall
Delivering a U-Value of 0.12W/m2K and designed to perform to its optimum level when used in tandem with our Passive Foundation system…
The MBC Passive Roof
400mm thickness of Cellulose Roof Insulation is precision fitted to overlap with the 300mm Cellulose Insulation of the Passive Twin Wall System…
Passive House Technical detail
View a detailed cross section diagram of our Passive House Twin Wall system…
What you Get
Passive House Essential Elements
Non Structural Elements of our Passive Homes
All opaque building components of the exterior envelope of the house must be very well-insulated. This means a heat transfer coefficient (U-value) of 0.15 W/(m²K) at the most, i.e. a maximum of 0.15 watts per degree of temperature difference and per square metre of exterior surface are lost.
Passive House windows
The window frames must be well insulated and fitted with low-e glazings filled with argon or krypton to prevent heat transfer. This is achieved by a U-value of 0.80 W/(m²K) or less, with g-values around 50% (g-value= total solar transmittance, proportion of the solar energy available for the room).
Ventilation heat recovery
Efficient heat recovery ventilation is key, allowing for a good indoor air quality and saving energy. In Passive House, at least 75% of the heat from the exhaust air is transferred to the fresh air again by means of a heat exchanger.
Airtightness of the building
Uncontrolled leakage through gaps must be smaller than 0.6 of the total house volume per hour during a pressure test at 50 Pascal (both pressurised and depressurised).
Structural Elements of our Passive Homes
Absence of thermal bridges
All edges, corners, connections and penetrations must be planned and executed with great care, so that thermal bridges can be avoided. Thermal bridges which cannot be avoided must be minimised as far as possible.
MBC Passive Foundation & Slab System
MBC Passive Wall System
MBC Passive Roof System
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%.
MBC Timber frame
Having planned our house build for 3 years and finally deciding to go modern contemporary, it became obvious that we should consider a “ passive build” and being environmentally friendly.
The team at MBC provided us with good old fashioned honest advise, quotations and drawings that we could understand. One of the main benefits of MBC was they literally carried out everything from the passive slab, UFH and the frame thus easy to manage.
We worked very closely with the MBC team, and found them friendly, conscientious and very fair at all times. Every build has hiccups” we did and they were all resolved quickly and without any issue. I have recommended MBc many times and will continue to do so.
Hopefully we will build again and as such look forward to working with you again.
Peter and Sue Purslow