Prefab wall panels · St. Louis, MO
Prefabricated wall panels, built to your drawings
Wall panels, floor cassettes and roof panels, CNC-cut in our St. Louis plant. Order them framed, sheathed or fully closed with insulation, windows, cladding and MEP rough-in. Fixed factory price, delivered within 1,000 miles.
What you can order
Six ways to buy factory framing
Buy single assemblies or a full wall, floor and roof package. Your crew sets, connects and completes the building.
01Subcomponents
Preassembled door legs, headers, stud packs, channels, Els and repeat assemblies.
02Framed wall panels
Open wall frames with coordinated openings and agreed backing.
03Sheathed wall panels
Wall framing plus specified structural sheathing. Added enclosure layers are scoped separately.
04Floor panels
Coordinated floor framing with the selected joist system and decking where specified.
05Roof panels
Roof framing with decking where specified. Remaining roof layers are scoped separately.
06Closed panels
Agreed insulation, enclosure layers, windows, doors, cladding and MEP rough-in.
Approved drawings and the written quote govern inclusions, factory layers and field interfaces.
Packages
Pick the scope. We hold the price.
Framing only
Just the factory framing. CNC-cut subcomponents and open framed wall panels, built to your drawings. Your crew sheathes, closes and finishes on site.
- Subcomponents: door legs, headers, stud packs, channels, Els
- Open framed wall panels with coordinated openings
- Buy only the pieces your crew needs
Sheathed panels
CNC-cut, framed and sheathed wall panels, roof panels and floor cassettes. Your team insulates, closes and finishes on site.
- CNC-cut framing
- Structural sheathing
- Wall panels, roof panels, floor cassettes
Panels only
Sheathing, WRB, insulation, air barrier, windows, doors, cladding and MEP rough-in are factory-installed. MBS or your GC sets the panels, and interior-finish trades follow.
- Everything in sheathed
- Mineral wool insulation, R-23 walls
- Windows, doors and cladding
- MEP rough-in
- Rothoblaas air and vapor control
Turnkey
MBS contracts and subcontracts the build from start to finish. One contract, one schedule, one point of contact.
- Everything in standard
- Site work and installation coordinated by MBS
- Inclusions set in your agreement
The MBS Standard Wall
Seven layers, R-23 above grade
Our standard closed panel: 2×6 framing, mineral wool insulation and Rothoblaas air and vapor control, closed in the factory.
- 1Exterior cladding
- 2Weather-resistive barrier
- 3Structural sheathing
- 4Exterior framing
- 5Cavity insulation
- 6Air and vapor control
- 7Interior gypsum
- Effective R-value, above-grade walls
- R-23
- Air leakage on a blower-door test
- < 0.25 ACH50
- Sound rating with 5/8 in. gypsum
- STC 50+
- Fire rating with Type X gypsum
- 1 hour
- Wind loads engineered to ASCE 7 and local code
- ASCE 7
- Achieved on a completed MBS home
- HERS 42
Published assembly targets. HERS 42 is a project result, not a rating for every design. Approved drawings govern.
For GCs and framers
Built for crews and schedules
CNC-cut within 1/16 in.
Every member is cut to length from shop drawings that come straight from your BIM model.
Keep your framer
Your crew sets our panels. MBS can coordinate installation with your GC.
Standard trucks
Panels ship vertically or flat-packed on flatbed and step-deck trucks, within 1,000 miles of St. Louis.
Fixed factory price
Priced from permit-ready drawings, valid 30 days, fixed from contract through delivery.
What does shipping cost?
Freight within the 1,000-mile service area is included in your estimate. Cost depends on the project, the truck count and the distance. Send the site address with your plans.
Is the price really fixed?
Yes. The factory panel price is fixed from contract through delivery, regardless of movements in material or labor costs. The scope is set out in your quote.
How energy efficient is the MBS wall?
The MBS Standard Wall is a seven-layer, R-23 above-grade assembly with 2×6 framing, mineral wool insulation and Rothoblaas air and vapor control. Published targets: air leakage under 0.25 ACH50, STC 50+ with 5/8 in. gypsum and a one-hour fire rating with Type X gypsum. An MBS home achieved HERS 42. That is a project result, not a rating for every design.
I already have a framer. Can I keep them?
Yes. Keep your crew and have them set our panels. MBS can coordinate installation with your GC, and an installer training program is in development.
What foundation do MBS panels need?
Any conventional foundation your engineer specifies: slab on grade, crawl space or full basement. Your GC pours it while the panels are in production. We size the panels from the survey and the permit set, and the foundation is finished and inspected before the delivery date is locked.
Can you build to our specifications instead of the MBS Standard?
Yes. The MBS Standard Wall is our baseline, not a limit. We build to client specifications based on your project's needs, the quality of materials you want and your build requirements, including builder-grade options. We engineer and price your spec, and the final materials and assemblies are set in your written quote and approved drawings.
Start a project
Send your drawings. Get a fixed panel price.
Permit-ready drawings and a site address are all we need. Your estimate is valid for 30 days and includes freight within 1,000 miles.