Should I insulate between the rafters in my attic?

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. Also, make sure the attic is well ventilated.

Do roof rafters need to be insulated?

Whether you need to insulate your roof rafters will depend on what you intend to do in the space directly beneath the rafters. For example, if the space beneath the rafters is going to be used for a living area, then you will need to insulate the roof rafters.

How do you insulate between 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.

Can you put insulation between joists?

Make sure that insulation boards are fitted tightly between joists and any gaps are filled with expanding urethane sealant. Any narrow gaps between a joist and perimeter wall should be insulated by specially cut pieces of board which in turn should be supported on blocks nailed to the underside of the joists.

Should you insulate ceilings?

In addition to walls and attics, insulation should be installed in ceilings with unheated spaces, basement walls, floors above vented crawl spaces, cathedral ceilings, floors over unheated garages or porches, knee walls, and in between interior walls—especially bathrooms—as well as ceilings and floors.

Yep… This is my house.. and this is me fixing MY mistake

Can you insulate the underside of a roof?

Open-cell spray polyurethane foam or closed-cell spray polyurethane foam (ccSPF) insulation can be sprayed along the underside of the roof sheathing to provide a conditioned and insulated attic space that can be durable and efficient in all climate zones (see Figure 1).

Can I use rockwool in rafters?

ROCKWOOL rafter insulation helps to provide thermal, fire and acoustic protection for roof spaces. Made from natural stone wool, our products help to provide robust and durable insulation between, above and below the rafters, depending on your project.

How do you insulate exposed roof?

Insulate the Roof Deck

Insulating the roof deck is by far the most popular choice for insulating exposed rafters. Usually, this involves installing 2" thick rigid insulation such as extruded poly board before the roofing is installed during home construction.

Does insulating your roof help?

As temperatures continue to drop outside, insulating your roof is one of the most important ways to keep your home warm during the winter. Insulation also prevents excess heat from entering your home and helps keep it at a moderate temperature during the summer.

How do you insulate a 2x4 rafter?

Some amount of thermal transfer will still occur through the joists themselves. Put insulation meant for 2x4 framed walls between the joists (which will be the same height as the joists), then lay a perpendicular layer of attic insulation (maybe R-30) on top of them.

Can you have too much insulation in your attic?

It's possible to over-insulate an attic as too much will cause moisture buildup and eventually result in mold. Eventually, adding more insulation leads to diminishing returns in trapping heat as well.

Is it better to insulate ceiling or roof?

If you are deciding between insulating the roof deck or the ceiling, Insulating your ceiling should be the priority. Not only is it easier but ceiling insulation is beneficial in a number of ways: Keeps the temperature in the building regulated. Saves on energy costs.

Does ceiling insulation need a vapor barrier?

Vapor Blockers

Vapor barriers—sheets of plastic or kraft paper—keep water vapor out of the wall cavity, so the insulation stays dry. Not every type of insulation needs a vapor barrier. But if it does, the barrier should face inside in northern, heating climates, and outside in humid southern climates.

What insulation should I use between roof rafters?

Normally, people use mineral wool or insulation boards to insulate the rafter space. We prefer recycled insulation for obvious reasons. If you are planning to use wool then it is imperative you wear protective clothing, goggles and a face mask, since the wool is an irritant.

How thick should rafter insulation be?

Common rafter depths range from 100mm to 200mm. This limits the maximum thickness of the insulation between the rafters to between 50mm and 175mm. This generally would not be a sufficient thickness to achieve the U-values required to meet Building Regulations and more insulation would need to be added.

Can you put wool insulation in roof rafters?

ROCKWOOL rafter insulation helps to provide thermal, fire and acoustic protection for roof spaces. Made from natural stone wool, our products help to provide robust and durable insulation between, above and below the rafters, depending on your project.

Can attic insulation touch the roof?

Attic insulation should not touch the roof. Although it can be tempting to over insulate, resist the urge. Too much insulation hinders airflow and can keep excess moisture from escaping, especially in attics.

Do you insulate attic ceiling?

A finished attic should be insulated much like the rest of the house, with insulation in the walls and ceiling. If your attic is already finished, it probably is at least partially insulated. However, most older attics are under-insulated so it's a good idea to raise the R-value where possible.

Should attic insulation be faced or unfaced?

Faced Insulation: If the attic doesn't have any existing insulation, use faced insulation with the paper facing toward the heated living space. Unfaced Insulation: When adding more insulation to an attic that already has insulation, use unfaced insulation.

Is it better to insulate attic or walls?

As for attic vs. wall insulation, always go for the attic. The largest pay back will be seen here. You would stop heat loss from natural convection and block solar gain (an increase in heat) in the attic, which can result in energy savings of 30 to 50 percent.

Which insulation is best for attic?

Many people consider fiberglass batt to be the best attic insulation. It consists of plastic reinforced by small glass fibers. The batt version comes in blanket form — i.e., small, pre-cut sections that you can lay down wherever you need to.

Do you need an air gap for insulation?

Insulation is technically a solid with a lot of air in it therefore, it is NOT an air gap. You literally must have a VOID, nothing in the air gap except air itself. So if you are installing under a roof or in a wall, you must create an air gap.