insul calc

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Insulation Calculator

Insulation is a project that just about everyone can do themselves. Assuming you don't mind getting a little itchy. There are products wrapped in a breathable material such as Owens Corning's Miraflex, that virtually eliminates the contact with the fiberglass. Most instances will be generic fiberglass material, with either a Kraft face ( vapor barrier) or unfaced (just the insulation).

An insulation product marked "Kraft Faced" is insulation with a built in vapor barrier. This limits the amount of moisture getting into the fiberglass and allows it to insulate much better. When fiberglass insulation gets moisture or wet, it loses some of it R value. Which is it's resistance to heat or cold. When installing Kraft faced insulation, always install the "Kraft" or " vapor barrier" side to the winter warm side. For example, if you are installing in an attic, the Kraft would be down or against the ceiling, if installing in walls it should be towards the inside of the room. That would be the winter warm side or where the heat is coming from.

Remember that if you are adding insulation to your existing ATTIC insulation, lay the added insulation perpendicular to the primary layer. This eliminates a lot of heat escape and will help maintain the R value that you have chosen.

Tools for Insulation

Light Gloves
Long sleeve shirt
Eye Protection
Dust mask
Tape Measure
Utility Knife
Stapler ( for walls )

Calculations will give generic results for the Northeast, click here and input your zip code to find out the recommendation. in your area.

Insulation is figured by the square foot. The calculator below will figure that in and tell you the number of rolls you need for that "R" value. For more info and products on Insulation click here.

WALLS OR BASEMENT WALLS
choose your R value

Enter the Total Length of Walls
Enter the height of the wall

LxW= tot sq.ft
option= r-11(155'/roll)= sq./ft div by 155 = total # of R-11 rolls (kraft faced)
option=R-13(129.9'roll)=sq/ft div by 129.9 = total # of R-13 rolls (kraft faced)

ATTIC CHOOSE "R" VALUE OR OPTION

Enter the Length of the area
Enter the width of the area

option name "attic insul r-30" value = new = sq/ft div by 53.3' = total # of R-30 rolls (kraft faced)
option name "attic insul r-38" value = new = sq/ft div by 42.7' = total # of R-38 rolls (kraft faced)

<select name= " add insulation ">
<option selected> 3 1/2 inches               sq/ft div by 155 = total # of R-11 rolls (unfaced)
<option> 6 1/4 inches                sq/ft div by 67.8= total # of R-19 rolls (unfaced)
<option> 9 1/2 inches                sq/ft div by 53.3= total # of R-30 rolls (unfaced)

FLOORS AND CRAWLSPACES

Enter the total Length
Enter the total Width

Length x width = square feet (R-19/77.5' roll) sq/ft div by 77.5 = total # of R-19 rolls

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