What is the estimated cost of removing old blown in insulation from my attic and replacing it with new rolled insulation?
I have a modest 3 bedroom ranch that was built in 1973.
You are probably in the $1 - $1.50 per square foot range if I had to give a price without seeing the many complicating factors such as access, roof pitch, trusses vs stick framed, etc.
A few things I would strongly suggest considering.
- Air sealing your ceiling is way more important than adding insulation. Do NOT even consider adding insulation without air sealing first. Once all the insulation is removed this should be easily accomplished and will not add a significant amount to the price of the of the job and your payback on this portion of the work will be very quick.
- As part of your air sealing package, pay close attention to your attic access hatch/pull down stair. This is often overlooked. It's very important that this is well insulated and sealed properly or all of your insulation work will be wasted.
Also, I would consider blown-in insulation rather than rolled insulation. There are pros and cons of each, but the rolled typically goes between the ceiling joist and creates a lot of gaps permitting thermal bridging.
- The blown in will typically cover the ceiling joists lessening the chance of thermal bridging through your framing members.
- Be sure proper baffles are installed at the eaves to prevent the wind from blowing around your insulation.
Lastly, in your climate zone, the minimum code R-Value I think is R-30. It will be pennies more to blow in a few extra inches to get R-38.
For more information:
Read "What is the safest and most effective insulation for our attic crawl space?" a Q&A answered by Ian MacLeod.