This fall we finally insulated our walls and increased the insulation in our attic. We had blown in cellulose put in. It rocks. Today the high was 25°F outside plus a wind chill in the single digits. Our upstairs thermostat was set to 55°F during the day and it never fell below 62°F upstairs (according to the thermostat). I found it fairly comfortable when I came up to put the baby down for his nap.
The process of installing cellulose insulation was fairly simple. They took off a few rows of siding around the whole house, 1st and 2nd floors. Then they drilled holes in the walls, blew in the cellulose, then plugged the holes and put the siding back up. They used timers each time they had the insulation blowing, if it ran too long, they’d look inside to see if there was a problem, such as an open wall to the basement. We didn’t have any, because before they started insulating, they air sealed the entire house and made sure that all the walls were closed at the bottom.
We have a 1600 square foot house and the whole thing, walls and attic, was done in a day and a half.
One thing to note is that our house is more humid now that it’s all sealed up and insulated. We put an exhaust fan in the bathroom to help minimize any humidity problems. So far the humidity has been a good thing meaning we haven’t had to set up the humidifiers so far this winter.
I should mention that we also had our 33 year old natural gas boiler (heating system) replaced last winter with a 96% efficient gas boiler. With the insulation and new boiler, we reduced our gas usage in November by over 55% and saved $82.
I cannot say enough good things about getting your house insulated! If the benefits to the environment don’t convince you, the benefits to your bank account should! The insulation work cost us $4,000 before any rebates or incentives (For us the rebate from our gas company was $2,000 and the federal tax incentive is $1,500). We are on target to save $800 on our heating bill this year.