Our Clear Pine Open Louvre Doors are expertly handcrafted to increase strength & durability. The open design means there is a 5mm gap between each slat, making these doors ideal for use in areas that need ventilation, such as airing cupboards or boiler cupboards. Our louvre doors are 28mm in thickness. All WoodDoor Louvres are supplied untreated and can be fitted this way, right out of the box.