So it s time to pay close attention to what s happening up there.
Attic insulation to cool house.
If you ve got a two story house and you re used to upstairs rooms always being hotter than downstairs rooms it s not necessarily because the heat inside your home is rising to the upper floor.
Sometimes people say they want to install a pav to cool the house because they don t have ac.
Just as insulation keeps heat in during winter it helps keep it out during summer.
If you live in an older house you ll have to inspect the insulation.
Having insulation in your attic can help you save up to 20 in heating and cooling costs.
Add the right kind of insulation.
And they d still want to have the ceiling air sealed and fully insulated to minimize heat transfer from the attic to the house.
That means insulating the attic floor only not the walls and having vents in the roof.
Insulation levels are specified by r value.
And having insulation in your attic keeps the area at a consistent temperature.
Proper attic insulation is the best way to prevent heat loss in the winter and retain cool air in the summer.
How to insulate a finished attic.
The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.
Thickness must not be used as the sole factor in determining the r value of loose fill insulation particularly for attic insulation.
Whether using loose fill or batts put the vapor barrier closest to the warm side of your installation where hot moist air would get in facing the house s interior in cold climates beneath floor insulation and the attic s interior in hot climates on top of floor insulation.
Your attic insulation that s what.
In that case what they really need is a whole house fan not a powered attic ventilator.
R value is a measure of insulation s ability to resist heat flow.
The higher the r value the better the thermal performance of the insulation.
A finished attic should be insulated much like the rest of the house with insulation in the walls and ceiling.
In order to facilitate this exchange of warm and cool air the general rule of thumb suggests installing at least 1 sq.
If you live in a newer house you can probably get this information from the builder.
Wall insulation can reduce a home s heat loss by 67 while attic insulation can lead to a 40 decrease in heating and cooling costs.
Of vent for every 300 sq.
10 of your home heating bill costs stem from uninsulated floors.