Insulating A Roof Without Felt

Add a preinstalled membrane to absorb and release the condensation as it forms with the natural weather cycle.

Insulating a roof without felt.

When the home inspector checked the roof he found that the new shingles were installed without a layer of felt. Depending on your climate you ll need r 30 to r 49 to meet code which is 5 to 8 1 2 inches of polyiso rigid foam which is r 6 per inch. Loft insulation against rafters on an old roof with no felt lining under the tiles i want to make more use of the loft space and ideally want to insulate and board up the roof to create an clean insulated space. Insulate and try to keep from reaching the dew point.

If the roof is nailsick the slates should be removed with a proper slate ripper and checked for cracks and kept for reuse. He also found a water stain on the living room ceiling and recommended that the. The roof can usually be insulated under the rafters with sheet insulation and incorporate a vapour barrier. Traditionally we ve insulated the roof panel to try and keep the temperature on the panel from reaching the dew point.