If it is and you plan to provide heating and cooling to the finished attic space you need to remove.
Should i insulate my attic floor or ceiling.
Considering usable floor space.
Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.
In practical terms you can choose between mineral wool or insulation boards.
While local codes vary many communities will not permit the ceiling in a finished.
Stop using your attic for storage.
So insulating the floor of the attic is not only the best solution but it is also the simplest and cheapest.
The final word ceiling insulation is the most important.
If you do not use the attic much it is pointless heating this area.
The higher the r value the better the thermal performance of the insulation.
How to insulate a finished attic.
In unfinished attic spaces insulate between and over the floor joists to seal off living spaces below.
Plan to pull up the flooring and layer new.
Insulating the attic floor.
The headroom in the attic will determine how much usable floor space you have.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
With a finished attic insulation must help keep the attic areas comfortable.
That means insulating the attic floor only not the walls and having vents in the roof.
But if the floor is covered in plywood you can t stuff enough insulation beneath it to do the job sufficiently not even in warm climates.
Insulation level are specified by r value.
A finished attic should be insulated much like the rest of the house with insulation in the walls and ceiling.
1a attic access door.
Because the simplest and cheapest way to insulate an attic is to add material to the floor.
The attic floor which is the ceiling of the living space below often already is insulated.
If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space.
R value is a measure of insulation s ability to resist heat traveling through it.
If you are deciding between insulating the roof deck or insulating the ceiling it is most important that you insulate the ceiling.