Consider Building with Rastra Walls

Real Estate Agent with Blue Sky Real Estate

Rastra Construction can be cheaper to work with than standard wood framing; it's as strong as reinforced concrete; and, to top it off, its main ingredient is recycled, post-consumer polystyrene - better known as Styrofoam. So it's no surprise that the increasingly popular construction material called Rastra is currently in short supply.

The product is manufactured in blocks that resemble giant honeycombs. Each block is 10 feet long, 10 inches thick and 15 inches high, with cores for steel reinforcing bar drilled through the product every 15 inches. The blocks can be cut using a chain saw. Builders stack these basic units on top of each other, hold them in place with staples or urethane glue, and pour concrete.

Home builders are saving about 10 percent on their overall construction cost with this construction method.  It used to be that Rastra was approximately 15 percent higher than conventional framing. Now with the rising cost of lumber and framing labor going through the roof, the cost of Rastra has reversed itself.

Advocates of the material also note that it requires no additional insulation or treatment prior to interior or exterior finishing - another labor- and time-saving bonus. Rastra wall has the same expansion coefficient as a brick or concrete wall, so contractors can stucco directly over the material. Interior drywall can be glued directly to Rastra using drywall plaster, the resulting wall becomes a self-insulating monolith.

Comments (1)

Team Honeycutt
Allen Tate - Concord, NC

I enjoyed your blog. I have not heard about this product before.  Sounds very interesting.

May 22, 2010 05:10 AM