Why Build A Passive House?
Building a Passive House does not cost extra in the long term as there is no need to install a complex heating and cooling 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 Glazed Windows
- Thermal Insulation Barrier
- Airtight Membrane & Tapes
- Mechanical Ventilation & Heat Recovery (MVHR)
Our extensive knowledge and expertise in Passivehouse and Eco-friendly building enable us to deliver innovative, energy-efficient, and environmentally friendly structures that exceed the highest standards in the industry.
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Non-Structural Elements
All opaque building components of the exterior envelope of the eco 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.
In all of our eco builds, the window frames are 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 (g-value= total solar transmittance, proportion of the solar energy available for the room).
An efficient ventilation system is key, allowing for a good air quality and being energy efficient. In a Passive House, heat from the exhaust air is transferred to the fresh air again by means of a heat exchanger.
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). This is the result of using the best Passive House Components.
Structural Elements
All edges, corners, connections and penetrations must be planned and executed with great care, so that thermal bridges can be avoided throughout our Passive Houses. Thermal bridges which cannot be avoided must be minimised as far as possible.
Our passive foundation and slab is a PassivHaus certified system, designed to thermally encase the foundation in high performance expanded polystyrene (EPS) insulation, which delivers the lowest U-Value currently available at 0.105W/m2K.
The Passive House Wall system delivers a U-Value of 0.12W/m2K and is designed to perform to its optimum level when used in tandem with our Passive Foundation & Slab system.
The Passive House Roof system delivers a U-Value of 0.10W/m2K and is suitable for all roof designs (flat, pitch, barrel vault, etc), ensuring your desired eco building design remains unchanged.
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Thank you for your interest in LJC Architectural Design. If you would like to learn more about our services or have any questions, please don't hesitate to get in touch with us. We would be happy to answer any questions you may have and help you determine if LJC Architectural Design is the right fit for your needs.
To contact us, please fill out the form below with your name, email address, and a brief message. One of our team members will get back to you as soon as possible.
Alternatively, you can contact us directly by phone or email:
Phone: 01642 449744
Email: info@ljcarchitecturaldesign.co.uk
Our office hours are Monday to Friday, 9am to 5pm GMT. If you contact us outside of these hours, we will get back to you as soon as possible on the next business day.
Thank you for considering LJC Architectural Design. We look forward to hearing from you soon.