Will Insulating Attic Flooring Increase How Much Weight It Can Support?

Someone blowing spray foam installation under attic floorboards.

Insulating attic flooring not only lowers your energy costs by helping your house retain warm air in winter and cold air in summer, but it also supports the structure of your house, allowing your attic to support or hold more weight. Your attic flooring will only be able to bear insulation if the joists installed in your house are structurally sound enough, though, so inspect them before going ahead with your insulation project.

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