Massive Scale Prefab.


Why source independent components when you can manufacture unitized systems on a massive scale from one company? Mammoth applies an integrated approach to building envelopes by manufacturing enclosure components in a complete panel to create a unified building envelope. One company designing, engineering, testing and fabricating highly-quality controlled building enclosures quickly, safely and efficiently reducing your risk.

Build with less

Mammoth offers a wide range of fully integrated building enclosure systems, while expending fewer resources comparative to standard construction methods. High quality, high functioning components that meet design intent on a compressed schedule. Each panel is made in a highly quality controlled, proven, systematic process, that ultimately meets or exceeds all building codes and testing requirements.

90% Less Weight

Significantly lighter than conventional construction materials.


Less Time

Significantly shorter building enclosure duration, reduced path to completion.


Less Money

Earlier completion saves carrying costs, delivers lower TCO & quicker revenue generation.

Less Labor

Potential reductions in on-site labor force as great as decreasing 60 workers to 6.

Lower Footprint & Energy

Off-site manufacturing supports mindful resource usage, reuse,& managed recycling. Compliant with energy requirements.

Fewer Value Decisions

Wide range of finishes gives Owners & Architects intended aesthetic and value more affordably.

Fewer Accidents

Reduce accidents & injuries, with bulk of work performed off-site in controlled environment.

Fewer Parties

Crew consolidation, single source building envelope & finishes, single source liability.


Systems are tested to ASTM standards and comply with building code & energy code.


Reliability and durability of Sto Panel systems are backed by 5-year performance warranty.


Minimal on-site staging required, with off-site manufacturing of install ready panels.

Unitized Systems

Mammoth offers a wide range of fully integrated building enclosure systems, while expending fewer resources comparative to standard construction methods. High quality, high functioning components that meet design intent on a compressed schedule. Each panel is made in a highly quality controlled, proven, systematic process, that ultimately meets or exceeds all building codes and testing requirements.

STO Panels

  • Classic CI
  • Impact CI
  • XPS CI
  • Brick CI
  • Precast CI
  • Metal CI
  • Backup CI

Load Bearing

  • Basic Metal Stud Assembly
  • Sheathing / Air Barrier (ABB)
  • Brick Tie Walls

Non-Load Bearing

  • EIFS
  • Thin Brick / Stone
  • Wood Panel

Contact Us

Frequently Asked Questions

Below we have listed several questions that are often asked. Where appropriate, we have included links to additional information. If you have further questions, please contact us. Our dedicated team of professionals is happy to assist.

Can Mammoth Panels be installed on all types of buildings?

Manufactured panels can be installed on a variety of building styles. In addition, just about any desired finish can be achieved. However, for structural support, there are some limitations. Cladding panels need to bypass the edge of the slab and the edge of the roof. Buildings that are designed for the walls to be built from slab to slab do not work well with wall panels.

Will changes to the building design be required?

Most of the time, only minor changes to the design of the structure will be required. Mammoth uses a track system and an adjustable clip to attach the wall panels to the structure. Slight adjustments will need to be made to the pour stop to accommodate the support system. Wall panels have size limitations. Mammoth will work with the design team to achieve a look that matches the original design intent and that is visually appealing.

Do the panels meet modern code standards for thermal performance?

Different locations have adopted different versions of the code. The newest codes have stricter requirements for thermal performance and continuous insulation. Mammoth builds panels that meet or exceed the newest building code requirements.

Mammoth provides project specific thermal analysis for the details and fully fabricated panels.

Can air and water penetrate the panels after they are installed?

No. Mammoth installs a continuous air and vapor barrier on the face, perimeter and openings for every panel. We use the STO Guard weather barrier system that is a fully tested and certified.

A silicone sealing system is used at every panel to panel and panel to other construction joint. Silicone sealants are also used at fenestrations such as windows.

The entire assembly is tested for moisture and air intrusion prior to fabrication and on site.

I am concerned about water intrusion in the exterior cladding for my building. It sometimes takes years for problems to surface and by that time, the costs to repair a problem can be significant. Are there any solutions to this problem?

Mammoth understands these concerns and the problems that can result from a failure. Our first defense is designing and building panels to the highest moisture and air intrusion standards. Second, we make sure that interaction with other assemblies, is carefully managed and coordinated. Third, we maintain a comprehensive quality control and documentation program that insures that every panel is built to the highest standards.

However, even with all of these precautions, unexpected things can happen. To provide peace of mind to all concerned parties, Mammoth offers Smart Wall Technology that can be built into every panel. This allows the building owner to find out in real time whether or not there are any intrusion problems.

Are the wall panels fire rated and fire resistant?

There are two types of fire ratings that may be required for wall panels, panels can be constructed to meet a one or two hour rating. This type of construction is required when buildings are near each other or other fire issues need to be addressed.

The other concern is for the fire rating of the exterior cladding in mid and high rise buildings. The recent tragedy at Grenfell Tower in London, has heightened the awareness for potential danger with certain types of building enclosure assemblies.

Wall systems that contain combustible materials need to have been tested per NFPA 285 requirements. The majority of the materials used in a Mammoth/STO Panel are non-combustible and will not contribute to a fire. The few materials that are considered combustible have been tested per NFPA 285 standards.

How long does it take to enclose a building with STO and Mammoth Panels?

The size of the building and the type of panel will determine the actual installation duration. Usually, it will take 75% less time to enclose a building with panels when compared to conventional construction. For a building enclosure schedule that has a 180 day duration; using traditional methods the duration can be reduced to 45 days.

A preliminary project review is needed to determine how much time can be saved using fully finished panelization.

Are there size restrictions for how big the panels can be manufactured?

Yes. Fully finished facade panels are produced in an off site factory. Panels are shipped to the project site on flatbed trailers. Wall panels can be up to 16’ 0” wide and as long as 48’ 0”. The ideal size for panels is around 12’ 0” high by 24’ 0” long. Project requirements, aesthetics and structural constraints will dictate the reasonable size for panels.

How long does it take to produce panels for a project?

There are three key phases to a panel project, Design, Fabrication and Installation. This process should start at least six months prior to the time panels need to be installed on site. This will allow for appropriate design planning, submittals, approvals and fabrication to take place before the panels need to be installed.

Erection, the part that everyone sees, takes place quickly, sometimes in just a week or two, and for larger projects, a month or two. For a larger project, the total duration could be eight to twelve months.

At what point in the design or building delivery process should panelization be considered?

Ideally, the earlier in the process the better. We can provide details and insights early in a project lifecycle that will eliminate any need for re-design and will ultimately save time and money.

With certain styles of buildings, our system adapts easily and can be incorporated later in the design process. We even have some solutions that are fully designed, and the opportunity for re-design is past.

I have a building that is past the design and development phase and has entered the construction phase. Are there any panelization options that can help with schedule concerns?

Yes. If the building is already designed to have the exterior facade framing bypass the edge of slab and the roof perimeter angle, we may be able to offer some options.

Will using Mammoth/STO Panels save on project costs?

If all of the factors are considered, the answer is Yes! However, in budgeting, our system cannot be compared to a couple of line items on an estimate.

A primary element that is usually not taken into consideration is ‘Time’. The saying that ‘Time is Money’ is especially true in building construction. The revenue that a building is going to produce has a value. A building that can be delivered, one, two or even six months early can start producing revenue sooner.

Additionally, fully developed single source building enclosure panels save on several ancillary construction costs that are not always readily apparent. Please take a look at our page on ‘Evaluating All of the Costs for a Building Enclosure System’. We feel that after reviewing this information you will agree that we bring value to a project at every step of the process.