1. Remove trim and ridge vents.
2. Install a "hat" section directly through the tertiary roof panels and secondary perlins.
3. Install new roof panels over the existing roof panels.
4. Install trim.
The manufacturer guarantees the system against leaks and the installer backs it up for a period of three years. The wind lift will meet code and original building specifications. A retrofit job can be completed at the rate of approximately 1,500 square feet per day.
1. It requires no demolition of interior "K-13" and "VRP "insulation and roof panels.
2. There is no additional interior work.
3. It eliminates the removal of the mastic on thousands of screws.
4. There is no risk of widespread corrosion and having to replace the roof, or at least a portion of the roof.
The best candidate is a standard metal building with primary steel, which consists of heavy gauge column beams and steel beam rafters. The secondary steel consists of 14-gauge wall girts and roof perlins with standard "C" girts on the eaves. The tertiary steel consists of 26-gauge wall panels and standard "R" panels" for roof sheets. In the process, “existing K-13" insulation in the building does not have to be removed. In addition, the underside of some roofs is a 2" "VRP" insulation installed at the time of fabrication of the building. This also does not have to be removed or changed for a retrofit project; however, insulation may be added between the existing roof panels and the new roof to increase energy efficiency.
If your steel building roof has been repaired over the years—maybe even several times—it is a great candidate for a retrofit project. Here are some examples of prior work:
1.) A layer of mastic
2.) A layer of fiberglass mesh
3. ) A third layer of mastic
4.) A final coat of the sprayed finish coat aluminum mastic