Insulating Old Roof 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.

Insulating old roof rafters.

Simply jamming batts between the rafters of a cathedral ceiling or insulated attic will interfere with the roof s ability to breathe. For rolled insulation place it between roof rafters. Look for water stains on the roof sheathing or damp or moldy spots on attic joists and existing insulation as a clue to where leaks might be. 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.

Insulating between rafters will do no good because the attic should be ventilated and the rafter insulation would be between two unheated spaces. Batts in the rafters. Roof insulation refers to the practice of installing insulation on the roof slope both above and below the rafters. Check out our how to video at the link below.

Time to get the insulation finished and get this place warm. Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place. Replace the floorboards and then spray more insulation on top of it. You can add insulation to the floor.

Https youtu be w4mkphzmqxw contact us restorat. Box out light fixtures. If your attic is going to be converted into livable space then you will need to insulate the roof rafters. Ceiling insulation refers to any type of insulation installed within the floor nearest to the roof structure of the home.

This old house recommends not depending on your attic floor space to be an extra storage space. The resulting buildup of moisture can soak the insulation nullifying its r value foster the growth of mold or even rot the framing. With a warm roof the usual process is to split the insulation into two layers. 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.

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. Depending on your climate an r value between 38 and 60 is optimal.