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Can-a-metal-building-be-stuccoed

Yes, but let us know up front during quoting that this will be the exterior finish.
There are several ways this can be done, but if the design is part of the plan we can help make this much easier.
The most common way is when the customer uses their own board siding. This could be plywood or CMP board. or the PBR panel can be installed backwards so it has more flat area.  Then this will then be covered with chicken wire and installed on the exterior walls instead of our typical sheeting. Stucco will be applied over this surface. There are a few things we can do for you to make this easy.
First, is to change the deflection factors of the building. The standard deflection allowed is L/180 on the frames and L/90 on wall girts. These will be changed to a stiffer value, normally L/240 on frames and L/120 on wall girts. This prevents excessive motion on the walls and will keep your stucco from cracking and popping off.  For some codes it requires L/600 for a brittle condition.  This could be very expensive.
Second, we can alter the spacing of the girts themselves. Most of these wood panels are 4 x 8 feet in size, we can adjust the girt spacing to every 4 feet or even 2 feet on center to accommodate your panel size.
Finally, we will remove our wall sheeting so your are not paying for something you will not require.
The final result is a building that resembles that of a residence and not a commercial steel building.
One of the best options we have found is for the building to designed with standard deflection and girts are spaced for plywood.  And then a synthetic stucco system is applies or an EFIS system is attached.  With these systems it will flex with the building.
But either way please work with us to make sure your building is designed for what you want to do.