Air Tightness

Air tightness is not only one of the most important drivers for better energy-efficiency (Jokisalo et al., 2009), it is also essential to ensure air tightness to avoid condensation inside the building envelope.  According to Janssens (2003) condensation quantities due to exfiltration are typically two to three orders of magnitude higher than the ones transported by vapour diffusion.

In New Zealand, standard connection details for fixing windows into timber structures provide an air tight seal between the timber reveal and the interior finish (gypsum board).  Fixings through the timber reveal, staples fixing the reveals to the joinery, and mitre cuts in the reveals, create weak points in that airtight layer.  To avoid the dependancy of the building's performance on good workmanship and skilled installation, offers the best-in-class REYNACONNECT air-tight system in combination with its proprietary flashing system.

The REYNACONNECT system consists of several components including a Duo-Foil for the internal airtight connection, a connection profile, stainless steel connection brackets, an exterior swelling tape, an elastic PU foam to fill the void between frame and joinery, and finally a paste to adhere the foil to the frame. has trained its installers to carefully prepare, install and finish this system to the principles of Building Physics.'s proprietary cladding flashing system and the REYNACONNECT take care of all connection details, guaranteeing air tightness, weatherproofing and durability in the most extreme temperatures as well as seismic and coastal areas.