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Show Check Losses of Heat Through Roof of Home Engineers have found that 62 per cent of the heat escaping from houses leaves through the roof or top-story celling. -Thut is where the great heat losses occur in winter, and where the excess heat of summer penetrates to make upstairs rooms unbearably hot. The roof is the place that Is cheating home owners of comfort and of fuel money every year. It is only necessary to hold one's hand over a hot radiator to establish the fact that heated air rises, and as this heated air strikes the ceiling it transmits its heat on through to the attic. Because the heated air is always al-ways found at the ceiling line the temperature difference between the outside and the inside is greater there than along the walls. And this temperature tem-perature difference Is the factor that governs heat losses. Furthermore, there Is less resistance to the How of heat at the ceiling line than in the walls, for only a thin layer lay-er of plaster separates top-lioor rooms from the attic, and above this there Is little to stop heat from escaping. In many otherwise well-built houses one can actually see daylight through the spaces between rafters at the eave line In lbs attic. It Is very d'Mirult to make construc-!o:i construc-!o:i tight at this point, and when winter win-ter coiner Ii o cold Tilr enters through 1 these openings and the beat created at great expense is lost. Not only does heat pass through openings, It penetrates readily the layer lay-er of shingles and roof boards, which offer only a meager bar to its passage, pas-sage, and seeps out over the whole roof surface. |