Polystyrene Board for Knee Wall Insulation
I want to insulate my knee wall space and bring it in the conditionned environment. For that I would like to put 2-faces 2″ polystyren boards to seal the underside of rafters. However, these 2-faced 2″ boards are hard to come by and I was wondering if I can achieve the same result by using two single-faced boards slapped back-to-back. For instance, I would use two 1″ garage door 1-faced SilveRboards.
Let me know what you think.
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