Pushing Insulation Through Floor Joists
Installing fiberglass or mineral wool batts or rigid foam boards in floors with exposed joists open floors is straightforward.
Pushing insulation through floor joists. Trim pieces of fiberglass insulation using a utility knife so the pieces fit into joist bays along the rim joist. The floor joists are all fastened to the rim joist which runs along the. The inside of the rim joist is sprayed from the sub floor to the bottom of the rim joist to drop the building envelope to the bottom of the joists. In an ideal world i d like to drill my holes right next to the wall so cable passing through joists are adjacent to walls.
4b slab floors built directly on the ground. Start at one edge of the crawlspace and install the insulation between the floor joists. If using faced insulation keep the paper vapor retarder facing up and against the subfloor. Joists are 180mm high i intend on completely insulating the void between ceiling floor.
The insulation should cover the whole depth of the cavity and contact with the floor. As i understand it building regs require you to drill holes through the center of joists 0 25 0 4 along the span of the joist this is going to put my cable run 75cm away from the wall. Cables running in the direction of the joists would be supported by p clips allowing fast easy installation. Installers should push the insulation up and fasten it to prevent any void or gap between the floor and the material.
4d extend insulation into joist space to reduce air flows. Joists are 180mm high i intend on completely insulating the void between ceiling floor. Make sure each run contacts the insulation you installed at the header band joists. 4c as an alternative to floor insulation foundation walls of unvented crawl spaces.