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[quote]QUOTE: Originally posted by nfmisso I second the insulation suggestion, and make sure that you do it properly. There should be a relatively unrestricted air path from the soffet vents to the ridge vents all over. This keeps the bottom side of the roof at the ambient air temperature, and will greatly reduce the heat build up due to radiant heating from the sun. To accompli***his, you may have to box in the rafters, then insulate, then another wall/ceiling. While you are at it, sheet rock the garage area where the cars go, cars have been known to catch on fire, and the sheet rock will provide precious minutes of protection for your trains. [/quote] Good point on the air gap between insulation and roof sheeting, it will also promote shingle life. Here in Ohio 5/8 inch drywall is required by building codes between any living space and garage. Some commercial building projects i have worked on actually do two layers of 5/8 drywall, for instance between two buisnesses in a strip mall if there is no masonry wall seperating them.
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