Windows and Doors

Correct Sealing of Windows and Doors onto the Structural Shell and How to Avoid Structural Damage Caused by Water Condensation.

It makes sense to combine a renovation of the façade with the renewal of the windows. Nowadays we set high

Demands for new windows; they shall conduct very little heat to the outside and must close airtight. The critical

Point of windows is no longer the glass, but rather the sealing between the window frame and the embrasure.

Not even the best insulating glass is of use if the window joint is not properly sealed. The window frame represents

A flexible connection between the glass surface and the embrasure, which must remain sealed through all types

Of weather. This especially depends on the precise sealing of the joints. Due to the movement of the building

Components, this seal has to be accomplished with permanently flexible sealants. Detailed recommendations

About the basic principles of window installation and the suitability of windows in facades may be found in the

"Leitfaden zur Montage – Handbook for Installation" (RAL Gütegemeinschaft Fenster und Türen – Community

Windows and Doors).

A 3-level model demonstrates the basic principles. It clearly separates the functional areas to protect joints

From outside and room-side exposures: The construction has to be airtight around the circumference

 (Level 1). Air flow from indoors to outdoors has to be excluded. The functional areas of thermal and noise protection

(level 2) must stay "dry". The area of weather protection mainly prevents the intrusion of rainwater

(Driving rain) from the outside. Intruded rain water has to be controlled and conducted directly to the

Outside At the same time, humidity must be able to pass from the functional area to the outside. The separation

Of the room and outside climates (level 1) has to be executed with a higher barrier to vapour diffusion than

The weather protection (level 3).

'Gerband Correct sealing of windows and doors' image

Overview of Correct sealing of windows and doors

Download Nss Brochure for Correct sealing of windows and doors below

Attached Documents

PDF icon Nss Brochure for Correct sealing of windows and doors (aNSS_Airtight_Brochure_GERBAND_TREMCO_ILLBRUCK.pdf | 1.90 MB)

Nss Brochure for Correct sealing of windows and doors