Converting 4″ Walls to 6″ Walls and Adding Insulation
In the summers of 2005 and 2006, we converted our exterior bedroom walls from 4" (3.5" actual thickness) into 6" (5.5" actual thickness). This is a 57% increase in thickness, but since we also replaced some old compressed rock-wool insulation and added a vapor barrier, the R-value was perhaps doubled. And boy, do we feel a difference when the temps dip below zero! But, we still had our living room, kitchen, and bathroom remaining with 4" walls. So, with the high price of heating oil, I decided to tackle the South wall of our living room. To see a nice overview of the steps involved, go to This Article At NaturalHandyman that I wrote for them. Within the article are details of the projects and step-by-step photos. To see a video overview of this latest project, go to South Wall Insulation Project Video or play the video embedded below.
This is a messy project, but if you clean as you go, it is not bad. Once the painting is done, you are left with the "finishing touches" which consist of shortening trim and replacing other trim and extending window and door frames. This can drag on a bit since it is slow work, but at least it is not messy. I am still plugging away at my trim from our South wall project of late July. But it will get done. Still, this project is well worth the time if you live in a northern climate and you will appreciate the comfort of a well insulated house.
The cost of this South Wall Project was about $200. About $35 in new insulation, $40 in drywall, $80 in 2×4’s, and some more for window and door extenders, Great Stuff insulating foam, plastic, and other odds and ends. Not a lot to pay in my opinion, and money recovered in a few winters.
Tags: insulation, R-value, save energy, save heat