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.

Insulating old roof rafters.

Ceiling insulation refers to any type of insulation installed within the floor nearest to the roof structure of the home. If your attic is going to be converted into livable space then you will need to insulate the roof rafters. Check out our how to video at the link below. You can add insulation to the floor.

Roof insulation refers to the practice of installing insulation on the roof slope both above and below the rafters. Check here for energy star recommendations. 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. 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.

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. The resulting buildup of moisture can soak the insulation nullifying its r value foster the growth of mold or even rot the framing. Insulating between rafters will do no good because the attic should be ventilated and the rafter insulation would be between two unheated spaces. Replace the floorboards and then spray more insulation on top of it.

This old house recommends not depending on your attic floor space to be an extra storage space. 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. Once air leaks have been addressed you can add insulation. Https youtu be w4mkphzmqxw contact us restorat.

Box out light fixtures. Time to get the insulation finished and get this place warm. Batts in the rafters. Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place.

For rolled insulation place it between roof rafters. Depending on your climate an r value between 38 and 60 is optimal.