OKAWOOD - Insulating Glass with Wooden Grid OKAWOOD is a successful synthesis between the classical and the modern construction material, between wood and glass. OKAWOOD is made up of a filigree wooden grid which is integrated in the cavity between the glass panes of insulated glazing. Therefore the natural wooden material is protected against the effects of the weather. OKAWOOD offers: • efficient directionally selective sun protection • very good heat insulation • natural vibrant appearance of the façade • partial though-vision • privacy screening from outside to inside • can be easily recycled • visibility for birds Physical properties Thermal insulation OKAWOOD is available as a 2-pane make-up with a cavity of 18 mm, and also as a 3-pane make-up with an additional cavity between the glass panes. Depending on the gas filling and coating, the 2-pane make-up achieves Ug values ≥ 1.3 W/(m²K). As a 3-pane make-up, Ug values ≥ 0.6 W/(m²K) are possible. Sound insulation The integrated wooden grid has no significant effect on the sound insulation. The achievable values depend on the glass assembly. Spectral properties The wooden grid acts as a solar protection device and allows a warm tint of daylight to enter between the bars. The compact cross-section of the louvres enables horizontal through-vision of approx. 50% of the surface area. The function of OKAWOOD depends on the prevailing sunlight conditions. Partial through-vision is always given, despite the sun protection which differs depending on the season and time of day.

INFOTEXT Integrated in a vertical façade, OKAWOOD functions as follows: 1. direct irradiation from high and medium solar altitude • thermal solar protection with total solar energy transmittance values of as low as ≥ 7 %, in particular secondary heat transfer with low solar radiation transmission • glare protection 2. direct irradiation from low solar altitude • partial transmission of the direct sunlight Technical values of standard types Table 1: Geometry of the OKAWOOD grid Distance of Horizontal louvre trough-vision [mm] % 10 50 Trough-vision to above lower a [°] b [°] 35 35 The following...

Figure 1: Angle-selective light transmission Tv according to DIN EN 410 of OKAWOOD in the 2-pane make up with low-e coating Legend and related values: unit standard Ug W/(m2K) DIN EN 673 DIN EN 674 TSET % DIN EN 410 Tv % DIN EN 410 FC SC Figure 2: TSET according to DIN EN 410 in the 2-pane make up with low-e coating technical term Thermal transmittance Total solar energy transmittance or solar heat gain coefficient Light transmission (direct/hemispheric resp. diffuse/ hemispheric) Reduction factor of a solar control system, FC=TSET/TSETreference Shading coefficient, SC=TSET/0.86 The above data...

INFOTEXT The natural wood grid insert is made of high-quality laminated wood cut from locally cultivated indigenous beech. Table 4: Domestic wood The precious wood grid insert is made of solid wood. All the wood used in our products originates from sustainably managed forests. Other types of wood are available upon request. Table 5: Exotic wood Standard make-up Vertical glazing: 2-pane make-up External pane made of thermally treated glass Cavity: 18 mm with wooden grid, rough-sawn surface Inner pane made of thermally treated glass, low-e coating face #3 3-pane make-up External pane made of thermally...

INFOTEXT Standard make-up Horizontal glazing: 2-pane make-up External pane made of thermally treated glass, functional coating face #2 Cavity: 18 mm with wooden grid, rough-sawn surface Inner pane made of laminated glass from heat strengthened glass thermally treated glass 3-pane make-up External pane made of thermally treated glass, functional coating face #2 Cavity 1: 18 mm with wooden grid, rough-sawn surface Intermediate pane made of thermally treated glass Cavity 2: 8 to 12 mm with gas filling Inner pane made of laminated glass from heat strengthened glass thermally treated glass, low-e...

INFOTEXT For tolerance reasons and due to differing temperature expansion, the insert may be exhibit an expansion gap of up to 2.0 mm on each side. This can lead to a visible gap between the insert and the spacer bar. For this reason, the depths of the glazing rebate must amount to at least the required overall sealant (spacer bar + secondary seal) plus 5 mm. Otherwise the edge area has to be covered by a screen print. In the case of a polysulphide as secondary seal, it may be necessary to use a exceed cover in order to provide sufficient UV protection. In the case of a frameless glazing system,...