Is it better to insulate the roof or the attic?

Floor insulation is standard practice for an unfinished attic. The exception to this rule occurs when families choose to convert an unfinished attic into something usable or habitable.

Is it better to insulate the roof or the attic?

Floor insulation is standard practice for an unfinished attic. The exception to this rule occurs when families choose to convert an unfinished attic into something usable or habitable. Aluminum-clad wadding insulation is often used in cathedral roofs because it provides the permeability rating that is often required for use on non-attic roofs. A ventilation baffle must be installed between the insulation and the roof deck to maintain the ventilation channel.

Sure, you can lower the thermostat and get used to wearing bulky sweaters indoors to cut costs. But if you have an unfinished attic, giving it proper insulation is one of the easiest ways to keep a lid on your heating bill this season. It's a DIY project you can tackle in a weekend, and the savings you'll get add up every year, says TOH general contractor Tom Silva. Department of Energy estimates that an attic with adequate insulation can reduce your heating bill by 10 to 50 percent.

And it works the opposite way for hot climates; in summer, it helps stabilize the indoor temperature of the house to keep cooling needs under control. The main difficulty of this technique is to seal the barrier to the top plate of the wall, especially in the eaves where there is little room to maneuver. This area must be well sealed. Aerosol foam or rigid board insulation can help close the gap in this area.

Cut the rigid board to fit between the roof joists and extend from the top plate of the outer wall into the attic. A second piece of rigid insulation, installed vertically, joins the polyethylene to the horizontal rigid plate. Carefully seal any joints or seams between materials. Two-part expanding spray foam kits (or the service of a spray foam company) are also very good at sealing areas around joists and boards.

As mentioned above, insulation of the attic roof is easier and less expensive than roof insulation. Installing (or adding) insulation to the roof plane is quite simple. It is very beneficial to consider whether you could benefit from better insulation before installing a flat roof. Insulate floors above unconditioned spaces, such as ventilated spaces and unheated garages.

If you are considering converting your attic into a storage space or conditioned housing, it is worth changing the tactics to insulate between the joists and beams of the wall instead of the floor. If you are doing a remodel and the wall cavities will be open, look for two-part spray foam or wet aerosol cellulose insulation. Insulation integrity degrades over time, so it's best to update it before it gets to the point where it's completely ineffective. Standard indoor recessed lights are difficult to effectively seal from air and can become a fire hazard if covered with insulation.

Covering the soffit vents with loose padding or wadding, which can happen if insulation is placed along the eaves, is a big no-no. You probably automatically think that more insulation is better than less when it comes to energy efficiency, but that's not necessarily the case. from the lining to maintain the ventilation space and then fill between this foam board and the attic floor with insulation (see Figure 5-2.In unfinished attic spaces, insulate between and on the floor joists to seal the living spaces below. If you think your home needs more insulation due to rising energy bills, consider installing higher quality insulation.

Most temperature changes occur through the roof, so attic insulation is by far the most important insulation a house can have. Slab foundations with interior insulation provide more termite resistance, but some builders in the southeastern United States have even reported termite infestations through foam insulation in contained slabs. You can find relatively cheap fiberglass insulation in bulk quantities, as is the case with this roll of Owens Corning R-38 fiberglass insulation designed to fit up to 341.36 square feet of attic space. .

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