10/07/2026
With the windows installed and the airtightness dealt with internally, we now turn to the external window reveals.
The Zyle Fenster frames allow for a generous 50mm deep Gutex wood fibre batten to be installed on the two sides and head, (a chamfered section of Gutex also placed under the aluminium cill).
The Gutex is then cover with ProClima Contega external adhesive tape, creating a waterproof connection from the window frame to the external breather membrane.
All this effort is to improve the thermal bridge psi-value at each junction (ie reducing heat loss).
Why do this?
At Passivhaus levels creating thermal bridge free details really benefit the overall heating demand of the property and ultimately contributes to internal comfort levels.
northernireland
