The wood section is 92x78 mm for the sash and 92x68 mm for the frame, in 4 layers laminated wood. The aluminum clad for the frame is 17 mm and so after the assembling the total thickness is 109 mm for the frame and 101 mm for the sash, that from the outside is all in glass. The painting treatment and the structure of the aluminum clads are made with the same technologies used for the other wood-aluminum products.
Glassflat windows and doors have always a triple pane structural glass with double chamber, with 2 Low Emissivity glass panes and 16 mm or 18 mm chambers filled in with Argon Gas. The external glass pane is a structural tempered glass with 8/10 mm thickness, screen-printed on its perimeter to conceal the wooden part that remains at sight from the outside. It is possible to install glasses from 52 mm to 62 mm thickness. These windows and doors have three EDPM gaskets installed on the frame, that offer a total resistance against the atmospheric agents. The first gasket is positioned on the clad profile, going through all its perimeter without stopping in the corners. The other two gaskets are installed on the wooden frame and overlap in the corners to assure an hydro pneumatic thigh system to the window and a great sound insulation. In order to improve the efficiency on the discharge of eventual water infiltrations passed through the first two gaskets, on the external lower profile of the frame there are some drainage holes.
For the closing system of the sashes Glassflat windows and doors always have concealed hardware made in steel, silver color, treated with antioxidant products, with tilt and turn opening mechanism and several locking points on the whole perimeter of the sash with a high anti-breaking system level, central lever bolt for the typologies with 2 or more sashes, matt chrome or polished brass hinges coverings and handles. The opening of sashes with concealed hardware can be maximum up to 100°.