When does one add insulation and does one determine if there is enough insulation already? Adding insulation can be complicated and there are many opinions to the amount. What is the R rating for on the insulation package?
Here is how to measure existing insulation and determine if the attic needs more.
Tools needed: Yard stick, dust mask, an insulation blower if applicable and caution.
When purchasing insulation remember the higher the R -Value the more you will need. When buying insulation cheaper may not be better try to purchase R-30 whenever possible and save on time and possibly money. The R value listed on insulation package is used to measure the insulations resistance to heat flow.
Measure the attics existing insulation with a yard stick if it is rated R-30 then it should be at least nine inches thick. If it is not determine the length and width of the house and multiply these together this will give one the attic square footage give or take a few feet.
From this one can determine how many rolls to purchase to build it up to at least nine inches thick.
Note: When working in the attic always be extremely careful never do this alone as one can fall between a rafter and through the ceiling and may get injured. Take much caution in where you stand.
Now if a person has blown in insulation the average R-30 thickness should be around 30 inches to properly do its job. Once again measure the thickness with a yard stick. Get the square footage of the attic the same way measure the length and width of the house and multiply them together.
Note: Attic insulation can be very irritating to the skin so wear a hat as well as long sleeves and gloves when applying insulation especially the blown in type.
After determining the amount of insulation needed. Next go to a hardware store that rents equipment and sells blown in insulation. Rent the machine and make sure you have plenty of face masks. Follow the directions and have someone feed the insulation in as the other person blows it in place. The machine is simple to operate and any one with basic skills can do it.
When finished and a home is properly insulated one will save money each month on the heating bill. Properly insulating a home is practical and will pay for itself the first year.