Increase your r value by layering insulation.
Batting material in old house attic.
The big disadvantage with spray foam is cost.
Because the simplest and cheapest way to insulate an attic is to add material to the floor.
There are other materials and systems that you can use to insulate your attic.
Stop using your attic for storage.
These insulation levels will keep heated air from migrating out in winter.
Additionally purchase some loose fill insulation to insulate corners and angles where the batting won t fit.
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.
Plan to pull up the flooring and layer new insulation on top of the old.
I d blow insulation on the attic floor after air sealing of course.
To insulate an attic get some batting made out of mineral wool fiberglass or recycled foam.
The format of house insulation you need depends on where you put it and if you need to control.
You ll want to buy enough batting to lay at least 10 to 14 inches over the entire space.
Even if you bought the house with insulation already installed into it it s best to double check.
If you live in a warm climate you require a lower r value.
The insulation must meet doe standards.
The insulation materials used in older houses are not as effective in keeping heat in as the new ones.
Layer more insulation over the old for more effectiveness.
Typically houses in warm weather states should have an r 38 insulation in the attic whereas houses in cold climates should have r 49.
Cold areas require a higher r value like an r 49.