Foam-free
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Foam-Free Insulated Foundations
You can use semi-rigid mineral wool—or you can build your house on piers
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New Book Details I-Joist Construction
A free, downloadable guide explains how to use I-joists (and avoid foam insulation) in high-performance buildings
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Building a Foam-Free House
If you plan ahead, it’s not hard to build a house without any rigid foam or spray foam insulation
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Grow Your Own Green … Insulation, That Is
Mushroom insulation might be the world's greenest insulation, when it becomes available