Hourdis blanket
An hourdis ceiling (from the French: plancher hourdis for plate element ) is an element ceiling made of clay hollow panels ("hourdis"), which are suspended or laid on as an insert or blind ceiling between beams made of steel (double T-beams), wood or reinforced concrete .
In France and the Mediterranean region, in particular, hollow clay panels are traditionally used as inserts in wooden beam ceilings as well as in roof construction.
A trickle protection made of fleece or in the form of a mortar coating is often provided over the hourdis tiles before a filling material is introduced as litter. A screed or in-situ concrete layer at least three to five centimeters thick can be applied over or instead of the litter . A floor structure made of drywall or wood-based panels or a plank floor can be laid directly on the filling material.
An Hourdis ceiling consists of light, handy components that can be easily assembled by a single person. A slab formwork is not necessary. The technology is therefore preferred for small building projects and in the renovation of old buildings.