| 摘要 |
PROBLEM TO BE SOLVED: To provide a substrate structure with the high effect of heat insulation. SOLUTION: Base rafters 2 having front ends having a predetermined length and extended from the end of a substrate 5 are fixed on the substrate 5 at predetermined intervals, the heat insulation substrate material 1 forms a notch strip section 12 capable of covering the base rafters 2 on the rear side, a groove section capable of mounting a supporting member 4 for fixing a roof material and a vent groove 1a parallel with the notch strip section 12 are formed on the upper surface side, the notch strip section 12 of the heat insulation substrate material 1 is covered on the base rafters 2, an eave substrate material 61 is fixed to the base rafters 2, and the base rafters 2 and the end on the eave side of the notch strip section 12 are closed.
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