Most polystyrene insulated door can be thicker but have a lower R-Value than polyurethane. If you are seeking thermal efficiency and a high R-Value, avoid being deceived by the depth of the door! A polyurethane Garage Door might look thinner but actually offers a greater insulation R-value. That is on account of how the insulating material expands through the manufacturing process to tightly fill the cavity between both steel panels as it bonds to the skins of the door. Not only does this make the door better insulated, additionally, it makes the door very powerful and helps lessen noise while the door works. How long your door will last, what sort of punishment it can take, or even how much yearly maintenance it will necessitate is powerfully determined by the material used to make the doorway.

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