HEAT BUILD UP Heat can build up in your attic year round, which can cause problems in both summer and winter. Summer sun, can make your attic temperatures rise when solar rays from the sun hit your roof. If your attic is not properly ventilated, the temperature in the attic will rise. Insulation between your attic floor and living spaces below will slow the heat from pushing down into living spaces but it will not block heat. Eventually, the heat will penetrate the insulation and impact living space temperatures below. This will cause you to run your air conditioner more and for longer periods of time to achieve desired room temperatures.
In the winter, heat can rise from heated living spaces into your attic. Insulation will slow the transfer of heat to the attic, but again it will not block heat. If your attic is not ventilated the heat can build up. During heavy snow, the heat can raise the temperature of your roof, melt the snow and create ice dams at your eaves.
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