Best Way To Insulate An Existing Metal Building. Similarly one may ask, can you insulate under a metal roof? I am most concerned with insulating the ceiling.
Spray foam is the best because it can fill and cover cracks, corners, and other strangely shaped places through which air can pass in a building. If you are adding insulation to an already existing metal building, it is recommended to use foam insulation. The beauty of spray foam insulation is that it’s similar in nature to spray painting.
You can add to the energy efficiency and durability of your metal building with any of a large number of insulation options.
The best answer to this question is one specific method. Radiant barrier insulation should be installed in conjunction with constructing the structure. You do need to make sure the walls are ready to be sprayed, taking care. I am most concerned with insulating the ceiling.