Insulation Between Attic Rafters

Polyurethane or polystyrene spray foams can provide thorough coverage to roof rafters and attic walls in much less time than is needed for other materials.

Insulation between attic rafters.

2d extend insulation into joist space to reduce air flows. Time to get the insulation finished and get this place warm. Then feed the rolled insulation under wires and pipe if either is present. You can use rigid foam panels or do as tom silva does with nearly all houses these days.

The will hold open an air gap of approximately 1 inch to allow airflow past a layer of insulation. Place the plastic sheeting on top of the rolled insulation. In finished attic rooms with or without dormer insulate 2a between the studs of knee walls 2b between the studs and rafters of exterior walls and roof 2c and ceilings with cold spaces above. You can buy air ducts that staple to the inside of your roof above the eave vents and fit between the rafters.

Common rafter depths range from 100mm to 200mm. The ones i ve used are made of styrofoam and iirc they cost around 2. Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly. Https youtu be w4mkphzmqxw contact us restorat.

This limits the maximum thickness of the insulation between the rafters to between 50mm and 175mm. Check out our how to video at the link below. Push the insulation in place between the rafters but be careful not to compress the material. This generally would not be a sufficient thickness to achieve the u values required to meet building regulations and more insulation would need to be added.

Make sure it is flush against the wood as even a 1 inch gap can cause a 20 percent heating loss. For insulation to reach its full potential for preventing warm air migration it must maintain the. If your attic is going to be converted into livable space then you will need to insulate the roof rafters. For rolled insulation place it between roof rafters.