1. Cost per Square Inch...

I have a company that blew in insulation in my home attic for a set price. I am now asking them for a quote to blow in insulation into my garage attic. They said their prices went up but would honor the price they gave me on doing the house.

This is what I have figured so far and hoped someone could confirm or correct my thoughts to make sure I am paying the same "price".

My home got 13 inches of insulation blown in. My garage will get 10 inches. Here is what I have come up with...

Home Blown in cost: $2,000 Square Feet: 1356 Inches of Insulation: 13 Home Contract$2,000
/ 1356 sq ft
/ 13 Inches
= .113455 per inch - per sq ft

So to get the amount for the garage:

Square Feet: 2380
Inches of Insulation: 10

.113455 per inch - per sq ft
x 2380 sq ft
x 10 Inches
=$2,700.23$2,700.23 for garage contract of 10 inches of blown insulation?

Thank you for any guidance you can provide.

2. Re: Cost per Square Inch...

You've done it all correctly for the most part.

$2700$ is the price you should expect.

3. Re: Cost per Square Inch...

Thank you very much! The second part of this was the removal...

Home Removal cost: $2,800 Square Feet: 2000 Inches of Insulation: 5.5 (R19)$2,800
/ 2000 sq ft
/ 5.5 Inches
= .254545 per inch / sq ft

So to get the amount for the garage:

Square Feet: 2380
Inches of Insulation: 4 (R19)

.254545 per inch / sq ft
x 2380 sq ft
x 4 Inches
= \$2,423.27 (Amount I should be charged?)