French doors 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 doors that open outwards from where they meet: together they give a wide opening with no fixed centre section in the way.

Where the back door layout has one door opening outwards, French doors put a second one beside it. Both doors open outwards from the middle, so the whole width can be cleared — unlike a sliding patio door or a bifold door, where part of the glass always stays in front of the opening or folds against the side. It does need room outside for two doors to swing open.

The standard size is 1,600 × 2,200 mm. That is narrower than a sliding patio door or a bifold door, but with no tracks or folding hardware — a simpler and often cheaper way to get a wide opening onto the garden if you don't need the full width of a sliding patio door.

All about the Reynaers SlimLine 38 profile All about the french doors layout