Protect the Ground When Building in the Winter
If you are building in the winter months in a region that requires protection against frost and snow, your general contractor should take some steps to reduce the impact of his work. He should blanket the areas he will be excavating before the work begins to minimize frost penetration. This might be done, for example, by covering the ground with hay. The excavated areas should stay blanketed until they are backfilled.
Keep the Access to Your Property Clear When Building in the Winter
The access to your site must be kept free of snow and ice. Even though bulldozers can move mountains, their tracks will just spin if they attempt to pull any substantial weight on ice. All snow and icy areas, even small light patches, must be plowed and sanded just prior to delivery. If it snows after the foundation is poured but before the home is set, the GC should remove as much of the snow as possible from the basement before the set. This is often easier said than done, however, and sometimes it’s impractical, especially when the slab has not already been poured.
You and your GC will need an agreement about who is responsible for snow plowing, shoveling, and sanding while your home is under construction. Since neither of you will know what the winter will bring in any given year, an allowance, with a reasonable rate per snowfall or per hour, is a fair way to handle it.
If your home will be delivered in the winter, try to have the foundation installed in the fall. The GC should then protect the foundation from the frost.
Take Precautions Pouring the Concrete Floor When Building in the Winter
When building in the winter in a cold climate, the GC should try to pour the floor before the temperature drops below freezing, as long as he can also protect it from the frost. If this cannot be accomplished, and the floor will be poured after the house is set on the foundation, the area must be covered with hay or in some other way protected from freezing immediately after the hole is dug. Any frost that remains after the house is set must be removed by heating the basement before the foundation floor is poured. Otherwise, the floor may crack substantially. If extensive frost or snow must be removed by heating the basement after the house is set, extra caution should be taken to prevent the house from absorbing the moisture.
Get the Heat Going When Building in the Winter
Contractors are less productive when they are cold, and many construction tasks, such as taping and painting drywall, cannot be done until a home is reasonably warm. Consequently, if you are building in the winter, the GC will need to get the heating system up and running quickly. He will be delayed, however, if the heating system is going in the basement and the slab cannot be poured because of frost. The installation will also be delayed if the electrical power is not immediately available. In these circumstances, the GC will need to supply temporary heat, which is more costly and less effective.
If you live in a climate with cold winters, you may want the contractor to add antifreeze to the heat loop. You should do this if you are away from home in the winter or if you have a drive-under garage, since leaving the door open on a cold day can cause the pipes to freeze.
If you are building during the spring, find out whether your community allows heavy equipment to travel on the roads during the spring thaw.
For more about building in the winter, see The General Contractor’s Responsibilities for Building a Modular Home in my book The Modular Home.