Fixed window with top light in Reynaers SlimLine 38

With 33.5 mm of frame and 33 mm of sash in view (Classic; Cubic and Ferro 38.5 mm frame, T-section 48 mm), SlimLine 38 recreates the slim lines of traditional steel windows — the look often called Crittall-style — in aluminium. Frame depth 99 mm with an 86 mm sash for Classic, 76 mm frame for Cubic and Ferro; Uf 1.9 W/m²K; the HI+ version reaches down to 0.74 W/m²K as a whole window (Uw, so including the glass). There are four styles: Classic, Cubic, Ferro and Functional. The profile is Cradle to Cradle certified and, according to the manufacturer, 100% recyclable.

Reynaers' slim steel-look profile: 33.5 mm of frame in view, in aluminium.

Two fixed panes one above the other, divided by a transom: a narrow, tall window that only lets light through.

This window splits into two fixed panes: a small one at the top and a larger one below. Neither opens — it is the fixed window raised into a taller, narrower shape. That suits a stairwell, a hallway, or a strip of wall next to a door that already lets in enough air, where you're mainly after height and light rather than ventilation.

The standard size is 1,000 × 1,800 mm, with the top pane taking a quarter of the height and the lower pane the rest. If you do want to ventilate in exactly that spot, the fixed window with tilt-in top light — the same two-part window with a bottom-hung sash instead of the fixed top light — is the form that provides for it, without the look changing.

All about the Reynaers SlimLine 38 profile All about the fixed window with top light layout