Question: Can I Insulate The Underside Of My Roof?

Should you insulate between roof rafters?

The general advice we give is that you should always insulate between and above the rafters (warm roof) or between and under the rafters (cold roof)..

How many inches of insulation should be in my attic?

The recommended level for most attics is to insulate to R-38 or about 10 to 14 inches, depending on insulation type.

Can I put insulation under my roof?

Insulating between rafters will do no good, because the attic should be ventilated, and the rafter insulation would be between two unheated spaces. … You can add insulation to the floor; the more the merrier. Just don’t put it in the eaves.

How do you insulate heat from a roof?

Spray polyurethane insulation foam is a kind of foam sprayed on walls and on the roof to protect the house from heat and cold. Once it dries up it turns into solid insulation material. It keeps the roof cool and protects the building from penetration of moisture, cold air and sound.

How do you insulate a roof with exposed rafters?

If your structure does not need to be well insulated, you can simply sandwich a layer of aluminum foil insulation or rigid foam between your finish ceiling and a layer of sheathing. Place the sheathing layer on top of the insulation and secure it with nails that pass through the insulation into the rafters.

Is it better to insulate ceiling or roof?

As mentioned earlier, attic ceiling insulation is easier and less expensive than roof insulation. Installing (or adding) insulation to the ceiling plane is rather straighforward. And you may use very different insulation materials. Cellulose and other fibrous materials are good and inexpensive choices.

Can you put too much insulation in attic?

There’s really no such thing as “too much insulation.” It is more likely that your attic is not ventilating properly, resulting in warmer air on the 2nd floor and an overheated attic. … Lots of attic insulation will keep the 2nd floor temperature from changing quickly.

How do you insulate between ceiling joists?

The most common build-up of Loft Roll insulation is fit 100mm between the joists then placing 200mm (or 2 x 100mm) above the rafters perpendicular to each other. Soundproofing can be enhanced by fitting Mineral wool slabs in place of, or in conjunction with Loft Roll or Acoustic Partition Roll.

What is the most effective roof insulation?

If you do have a dry attic with easy access and evenly-spaced joists, the cheapest and simplest way to insulate it is between the joists, with rolls of blanket roof insulation. This can be made of mineral wool, glass fibre or recycled materials.

What is the best insulation for a roof?

Better materials for attic roof insulation are rigid foam boards and spray foam insulation.Spray foam: Technically known as Spray Polyurethane Foam or SPF, spray foam is most commonly applied in the space between attic rafters. … Rigid foam insulation: Rigid foam, like the SilverGlo® insulation from Dr.

Should I remove old attic insulation before adding new?

According to ENERGY STAR®, you can put new insulation over old insulation, “unless it is wet. … Any new roll or batt insulation installed over existing insulation in the attic needs to be without a vapor retarder (face). The vapor retarder on top of or between layers of insulation can trap moisture.