The roof heat preservation is the important part of the heat preservation, and it mainly depends on the heat insulating layer to realize. A wide variety of materials are used as roof insulation layer. Roofing construction practices are ever - changing. Each approach has advantages and disadvantages. Based on the energy conservation analysis computation to each kind of heat pres- ervation roofing,we obtain the applicable scope each kind of heat preservation plan.%屋顶保温是建筑保温的重要组成部分，屋顶的保温主要靠保温层来实现。用作屋顶保温层的材料种类繁多，屋顶构造做法也千变万化，每种做法各有优缺点。通过对各种保温屋面进行节能分析，得出每种保温方案的适用范围。
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