Thickness must not be used as the sole factor in determining the r value of loose fill insulation particularly for attic insulation.
How hard to work in attic after adding extra insulation.
Blown in insulation overview.
Floors walls and ceiling are insulated with batt insulation.
Add the right kind of insulation.
Find a diagram of common air leaks here.
When adding additional insulation you do not have to use the same type of insulation that currently exists in your.
To install fiberglass batts over existing insulation lay the batts perpendicular to the joists so they do not compress the insulation below.
Multiply the number of inches of insulation by the r value per inch.
This makes the attic colder and a colder attic with moisture leaking from the house can result in condensation mold and wood rot.
An adequately insulated attic reduces your home s energy costs by keeping warm air in during the winter and hot air out during the summer.
If a diy project costs to simply add a layer of r 13 or r19 23 fiber glass blanket over my existing insulation assuming it is also f g blanket style.
The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.
Check the attic walls and floors adjacent to an unheated space like a garage or basement.
Warm spaces have less condensation risk than colder space so when you add insulation to the attic floor you re intentionally blocking some of that heat from keeping the attic warm.
I have checked and the room is fully insulated i e.
Department of energy fibgerglass batts have an r value of 3 2 per inch while loose fill fiberglass.
Adding more insulation is almost always a good long term investment but before i would trust a sales pitch from a door to door vendor i would investigate alternate routes.
How to add extra insulation to an attic.
The only area where i could possibly add insulation would be in the attic above the room.
Gaps in the attic or between the lower floors and the attic will let heated or cooled air escape to the great unconditioned outdoors making any insulation you add essentially useless.
Inspecting and evaluating your insulation.
You can do it yourself for about 500.
Currently i would estimate that there is r 22 insulation in the ceiling of the room and i could fairly easily access the attic and.
Whether you live in a warm weather state as i do or in a cooler northern climate it s hard to stay comfortable and keep your energy bills in check if you don t have adequate insulation in the attic.
To determine whether you should add insulation.
How much does attic insulation cost.
Blowing attic insulation isn t hard but it s dusty sweaty work.
According to the u s.