GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Audio Play Icon Headphones Icon Plus Icon Minus Icon Check Icon Print Icon Picture icon Single Arrow Icon Double Arrow Icon Hamburger Icon TV Icon Close Icon Sorted Hamburger/Search Icon
Green Building News

Attic Stairs for High-Performance Houses

An Austrian company is manufacturing a pull-down stair certified by the Passivhaus Institut

Keep the heat in. The Klimatec 160 is a fold-down stair for use in buildings with unconditioned attics. Its hatch door is insulated with more than 6 inches of extruded polystyrene insulation.
Image Credit: Wippro

A New York-based retailer is offering a pull-down attic stair designed to solve a knotty problem in high-performance houses with unconditioned attics.

Unless a builder cobbles together a well-sealed attic hatch, or builds an insulated and air-sealed door and stairwell, the hole in the attic floor will mean a lot of wasted heating and cooling energy as well as serious air leaks.

The Klimatec 160, made by the Austrian company Wippro, offers builders a way to insulate the opening with 6.3 inches of extruded polystyrene insulation for an advertised R-value of 26 and an installed whole-unit R-value (taking the frame into account) of about R-17. An optional hatch adds 2 3/8 inches of insulation for another R-9.7.

The retailer, 475 High Performance Building Supply, sells the unit for $1,195; the optional lid is another $300.

The stair is certified by the Passivhaus Institut in Germany. It fits in a rough opening 55 1/8 inches by 27 9/16 inches, and has a staircase length of 98 1/2 inches to 118 1/2 inches.

A full set of specs is available at the 475 website. The Passivhaus Institut certificate is available here.

0 Comments

Log in or create an account to post a comment.

Related

Community

Recent Questions and Replies

  • |
  • |
  • |
  • |