Walls and Roofs
The easiest way to insulate walls from the exterior in older homes
Fitting extra insulation to an older home when renovating can be a great idea, but when insulating exterior walls from the outside take care to do it right. Ec…
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OSB and plywood exterior sheathing no longer contain Urea Formaldehyde, so they really aren’t that toxic anymore, especially on the exterior of a home. But by all means source a non-toxic one if you like, but typically it doesn't have a measurable impact on interior air quality. There is an interior grade plywood called Purebond from Columbia Forest Products in case you will have any plywood on the interior. I called the company to check and they tell me that it isn’t structural unfortunately. So unfortunately we don’t have any leads for you.