Built up roofing is usually designed for the warmer months, where the cold air from the ground is trapped under the roof.
The problem is that in the coldest months, the cold wind can cause the roof to sag.
If that happens, the roof can’t support the weight of the house.
The built-up roof.
Built-up roofs are designed to withstand the cold temperatures.
A lighter and stronger roof that doesn’t sag as much and doesn’t fall over.
In the winter, this type of roof may be the most economical way to build a house, especially if you don’t want to have to deal with heavy snowfall.
This article originally appeared in the June 25, 2018 issue of Popular Mechanics.