Modular Homes Go Greener

Modular homes are built to the same local and state codes as traditional stick-built homes. The way they differ is how and where they are built, with some builders going well beyond eco-friendliness to new levels of sustainability.

Modular homes are constructed as three-dimensional “modules,” or boxes. Each module is fully complete with electrical, plumbing, drywall, and some fixtures. The modules are built to design specifications. Instead of being “stick-built” on a home site, up to 90 percent of a modular home might be “systems-built” in a factory, then transported to the site, assembled, and finished.

A modular home has few, if any, design limitations. The average modular home contains three or more modules, but many contain five to ten modules. Modular homes can be built and configured to meet nearly any shape and size, at all price points, from entry-level and multifamily housing up to million-dollar mansions.

Because they are factory-built, modular homes have several eco-friendly advantages over site-built homes. Factories provide a secure and dry construction environment. Computer-assisted drawings and the efficiencies of the production line allow for more precise access to and use of materials. Because everything is based at one site, certain materials can be purchased in bulk and any excess materials can be reused onsite. When modules are transported to the site to be assembled on a permanent foundation and completed, there is less environmental disturbance.

Stick-built construction must deal with problems associated with an outdoor site. There may be a large amount of waste as materials left unused are often disposed of instead of recycled. Inclement weather and inadequate storage can damage materials. Lumber and other supplies must be dealt with where they are dropped off by supply trucks. Open sites are vulnerable to theft and vandalism. Also, those working on the house must deal with inclement weather, such as cold, high heat, high humidity, and rain.

New Certification Process

 
“The new green aspect to consider is that the industry is working closely in developing the only green certification process for manufactured and modular homes,” says Thayer Long, executive vice president of the Manufactured Housing Institute in Arlington, VA.

“These homes will be built to the National Association of Home Builders green building standard that site-built homes also will meet,” Long says. “In addition, the new industry process will include certifying that the home meets Energy Star requirements.”