As the seasons change throughout the year and the outside temperature changes, heat tries to enter and escape from your home. In the summertime, the hot outside air is trying to get inside while during the winter time, the heat from inside your home will try and escape outside.
In the summer, heat will try and enter the house through the roof first, then through the walls, windows and floors. Your home’s thermal efficiency can be improved by insulating each of these areas you’ll seal your home’s thermal envelope and stop or reduce heat gains in these areas.
In the winter, all your effort heating your home is quickly lost if your home is uninsulated. Heat will try and escape through the roof first, followed by the walls, windows and floors. A fully insulated house will trap the hot air inside and reduce your heat losses during winter.