FAQ

What are the advantages to using the Case-Modular Stair System?
Flexibility, and adjustability. You have the flexibility to build your staircase when you want to. You have the luxury of fitting your staircase to any floor-to-floor height. There is no need to communicate in advance an exact "Total Rise" for your staircase. You only need to know approximately, with in a few inches, what your final floor-to-floor height will be so that you order enough modules. Case-Modular's system can adjust on site the day you decide to install. See our online
Stair Calculator.

Also we think you'll appreciate the fact that you can carry the staircase to where it is being installed in easy to carry boxes, before it is assembled.

Most advantageous is the ability to build your own staircase without a big wood shop or any specialty tools or jigs. You can build your staircase with everyday carpenter tools.

How long will it take me to assemble and install?
Providing the stairwell is prepped and ready to receive your new staircase it should take you 1 day. Depending on your skill set, it could be a short day or a long day.

Once I order my Case-Modular staircase how long till it's delivered?
2 to 3 weeks depending on where you are located.

How do I order a staircase system for my project and what sort of information do I need to supply?
Visit our online Stair Calculator under "Support" then follow through to the "Request a Quote" link. Someone will contact you to verify numbers and make sure you order the right stair kit.

Do Case-Modular stair systems come with Railings?
Railings are a separate part of the stair building process, but the Case-Modular Stair System can be fitted with almost any type of banister. We also offer a trim cap for closed stringers that doubles as a base rail or shoe for spindles.

Is there any Technical info I can show my contractor?
Visit our support link for support tools, in particular check out the "How to" Videos and have them download and review the user manual.

When building my support wall, how do I find the angle and dimensions for the Open Side Support Wall?
First, be sure you understand that this Open Side Support Wall is only necessary for the staircase that is built with the Open step modules. These Modules are designed to sit on top of a support wall, not fastened to a structural stringer. They have a Triangle on their open side and a nosing return.

Once you're sure that this is the style of staircase you are building you can consider the framing process for this Open Side Support Wall.

See your User Manual section 4.1 Layout the Case-Modular staircase on the wall. This Layout will show you roughly where your staircase will land and how the wall's Hypotenuse (Angle) will look.

We suggest you frame this wall after Only after you have assembled your Staircase and have put it in place. This let's you use the staircase's Wall Stringer, after it's actually in place, as a reference for your Open Side Support Wall. You can tweak your support wall to accommodate for any out of level floor surfaces so that your stair Treads finish Level.

Are there any other tricks to framing this wall and getting it right?
Frame it in place (Stick Frame it). Use the Saddle Brackets to attach the top plate of your support wall to the underside of your open step modules and then stick frame the wall. First fasten a bottom plate to the floor and then add studs every 16 inches. See the back of your modules for the proper location of your top plate. This guide will help you space your wall just right inside and under the open side so that a ½" drywall and your outside trim piece fit well together.

As you add your studs, check the step above each stud for level. This will ensure that your support wall is right every time.

User's Trick: Use your Support Wall Trim and a scrap of drywall to make sure you frame your wall in the right place for these three to come together.

What is the maximum and minimum adjustable rise on these stair kits?
The minimum unit rise per step module is 7" and the maximum is 7 7/8"

The slot in my modules is too short and they won't let the bolts slide in far enough to set my riser height?
The slots show only 7/8 th of an inch on the face to make your maximum riser height of 7 7/8ths of an inch possible, but these slots are back bevelled so that you can chip out extra material with ease for smaller unit rise. Use a small chisel or utility knife. If you have a steady hand a jig saw can work too, but be careful not to take out more than you need to or it will show when you assemble the stairs.

Note: If you need a unit rise of less than 7 inches, you should consider losing one step module, increasing your unit rise.

Tools you will need

to build your Case-Modular Staircase


  • Ratchet set
  • Screw gun
  • Circular Saw
  • Tape Measure
  • Utility knife
  • PL Premium
  • 4- 2x4x8 foot long
  • Wood Screws 1¼", 1½" & 3"
  • Framing square
  • 2-foot level
  • 4-foot level
  • Pencil
  • Brad nailer & compressor for trim work
  • Clamps are handy
  • Caulking gun
  • 2x stringers a bit longer than your stair flight