Premium Wood Folding Attic Stairs Specifications
How to Choose the Correct
Folding Attic Stairs
Bolster the performance of your Windsor stairways with add-on options: (click for details)
Weather StrippingBulb and Four-Sided Weather Stripping: Both products, which are available as factory or user-installed options, provide increased energy efficiency and eliminate air drafts. Click here for more
Treated Fire-Retardant Plywood Door Panel: The FireGuard is a 9mm thick plywood panel pressure treated with DRICON® in accordance with the conditions outlined in the American Wood Preservers Association (AWPA) Standard C-20 for lumber and/or C-27 for plywood. Click here for more
Insulated Door Panel with Foil Facers: The Thermo Shield consists of a rigid 3/4" TUFF "R" polysocyanurate foam insulation board with reinforced foil facers on both sides. This panel is cut-to-size and affixed directly to the inside of the stairway door panel and offers an "R" rating of 5.9. Click here for more
This complete kit contains all the fasteners and pre-mitered and cut moulding needed to do the job right. Click here for more
Stairs Highlights
Taking durability and performance to the next level, Century's Premium Wood Series is our best-grade wood stairway designed expressly for heavier home usage, with a hefty 350-lb. load rating. The wider stairs and stiles provide greater stability and sure footing. Setting the industry benchmark, our Premium stairway is the only stairway on the market produced with the 1" x 6" stiles and stairs. It also touts Century's user-adjustable red nut J-bolt technology giving the stairs added strength. In addition to the regular models, Century offers our Premium grade stairways with a wider rough opening for ease of access and increased safety. The SpaceMaker Series is sure to fit your space requirements, and your budget.
Download Folding Attic Stairway Installation Instructions
How to Choose the Correct Folding Attic Stairs

Model |
Model Code |
Stair Type |
Rough Opening |
Finished Clearance |
Clearance between Springs |
Ceiling Height |
Stile size |
Step Size |
Landing space |
Clearance |
Load Rating |
| Premium | AET-89 |
Wood |
22 ½ x 54 |
20 ½ x 52 |
17" |
8' 9" |
1 x 6 |
1 x 6 x 13 5/8 |
61" |
70" |
350 |
| Premium | AET-100 |
Wood |
22 ½ x 54 |
20 ½ x 52 |
17" |
10' 3" |
1 x 6 |
1 x 6 x 13 5/8 |
70" |
80" |
350 |
| Premium | AE-89 |
Wood |
25 ½ x 54 |
23 ½ x 52 |
20" |
8' 9" |
1 x 6 |
1 x 6 x 16 1/2 |
61" |
70" |
350 |
| Premium | AE-100 |
Wood |
25 ½ x 54 |
23 ½ x 52 |
20" |
10' 3" |
1 x 6 |
1 x 6 x 16 1/2 |
70" |
80" |
350 |
| SpaceMaker | AG-89 |
Wood |
30 x 54 |
28 x 52 |
24 ½" |
8' 9" |
1 x 6 |
1 x 6 x 21 |
61" |
70" |
350 |
| SpaceMaker | AG-100 |
Wood |
30 x 54 |
28 x 52 |
24 ½" |
10' 3" |
1 x 6 |
1 x 6 x 21 |
70" |
80" |
350 |
| SpaceMaker | AG-89S |
Wood |
30 x 60 |
28 x 57 3/4 |
24 ½" |
8' 9" |
1 x 6 |
1 x 6 x 21 |
61" |
70" |
350 |
| SpaceMaker | AG-100S |
Wood |
30 x 60 |
28 x 57 3/4 |
24 ½" |
10' 3" |
1 x 6 |
1 x 6 x 21 |
70" |
80" |
350 |
Tools needed : How to Choose the Correct Folding Attic Stairs
*Get the Kit! Installation & Trim Kit, sold separately, includes these items.
Download Folding Attic Stairway Installation Instructions