Passivhaus Windows and Doors
To complement the air-tight well insulated structure of your home, it is vital that windows and doors are supplied and installed to a similar high specification. These must be super-insulated, draught proof products and need to be installed in such a way that no air escapes around the edges of the frame - a common problem when windows are poorly installed.
Typically, these windows are aluminium clad externally to minimise future maintenance, triple glazed and draught free, with various methods employed to reduce thermal bridging through the frames.
We are currently using Rationel, Green Building Store and Norrsken triple glazed windows on the majority of our projects.
Fox Barn (as seen in our gallery) is one of many of our projects which Rationel windows, and has been featured in their series of case study brochures, which you can download here: PassiveHouse_CaseStudy_A4.pdf.
- Outward opening options
- Triple glazed
- Aluminium clad exterior to RAL colour
- U values to 0.79
The windows are installed using a very air-tight process, with initially airtight foam installed between window frame and structural opening, and then air tight tape over that to form a second air tight layer. We can obtain quotes and arrange installation of the windows as part of our package if required.
Green Building Store windows
We have also been using Green Building Store windows on our projects, these come in two main options – the PERFORMANCE with u values to 0.85, and the higher performance ULTRA which offers u values to 0.68 on the Passivhaus certified version.
Ideal for both traditional and contemporary projects, the PERFORMANCE range offers great thermal performance. The tilt & turn style offers a European appearance and can be used interchangeably with the casement option, for design versatility.
- Inward tilt & turn
- Triple glazed (with double glazing option)
- Whole window U value: 0.81 W/m2K
- Mock sliding sash option
- FSC 100% certified laminated redwood (or oak)
High performance, cost-effective timber window range developed for Passivhaus and low energy projects. Up until now it has been hard to source outward opening casement windows for Passivhaus & low energy projects. The ULTRA outward opening range has been developed to help fill this gap.
- Triple glazed
- Passivhaus-certified insulated frame option
- Whole window U value: 0.75 W/m2K (solid frame option)
- Whole window U value: 0.68 W/m2K (Passivhaus certified, insulated frame option)
- FSC 100% certified laminated redwood
The PROGRESSION window creates an appearance with minimal frame visible from outside - the rainscreen covers most of the window frame so creates a minimalist modern look. U values are 0.68 so are suitable for passivhaus projects, where inward opening windows are acceptable.
We have used two of Norrsken’s low energy triple glazed window range – the Passiv , and the Passiv+ range on various homes, including the Knights Hill project as shown on the gallery page.
- Inward opening composite window
- Aluminium clad
- Whole window u value 0.7
- Triple glazed
Image shown is a cross section of the Passiv+ window.