The carpenters are laying down the ceiling planks on top of the roof structure (trusses and joists). This is the actual ceiling that will be visible from the inside of the house. The planks are from local pine wood. Directly on top of the ceiling goes a vapour barrier. The next step will be to place another layer of beams perpendicularly to the main trusses. These beams are taller than larger and will form the sides of the compartments inside which the 25cm of cellulose insulation will be blown. OSB boards are then used to close the insulation compartments.