Insulating Old Roof Rafters

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Insulating old roof rafters.

Once air leaks have been addressed you can add insulation. If your attic is going to be converted into livable space then you will need to insulate the roof rafters. You can add insulation to the floor. Batt insulation can be added to the underside of the roof between rafters and a layer of batt or loose insulation can be added over the attic flooring.

Box out light fixtures. Insulating between rafters will do no good because the attic should be ventilated and the rafter insulation would be between two unheated spaces. If 180mm is to be installed then 100mm board might be introduced between the rafters there has to be a minimum 25mm air gap between the insulation and the underside of the tiles or slates with an 80mm board running across the rafters. This old house recommends not depending on your attic floor space to be an extra storage space.

Depending on your climate an r value between 38 and 60 is optimal. Unless you re using mineral wool insulation or your fixtures are rated safe for contact with any type of insulation don t allow the material to touch or cover recessed cans or lights from the floor below it s a fire hazard. Roof insulation refers to the practice of installing insulation on the roof slope both above and below the rafters. If you have a solid floor covering the roof rafters use the claw end of a hammer to pull the floor up in several locations and blow the insulation under the boards.

With a warm roof the usual process is to split the insulation into two layers. Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place. Batts in the rafters. What to look out for when insulating roofs on old properties shallow rafters less than 75mm limit the depth of insulation that can be accommodated and if there happens to be a lath and plaster ceiling then forcing it into the rafter space might damage the ceiling below.

For rolled insulation place it between roof rafters. Time to get the insulation finished and get this place warm. Replace the floorboards and then spray more insulation on top of it. Simply jamming batts between the rafters of a cathedral ceiling or insulated attic will interfere with the roof s ability to breathe.

Check out our how to video at the link below. Ceiling insulation refers to any type of insulation installed within the floor nearest to the roof structure of the home.