Mueller Snap Lock (MSL) - Manual (Page 4)

4
IMPORTANT INFORMATION
Subcontractor selection
The customer must select a competent installer that is qualified and experienced in the installation of standing
seam metal roof systems. The installer should take time to study and understand this guide and follow the guide’s
instructions. Mueller, Inc. does not guarantee and is not liable for the qualifications of installer. Mueller, Inc. is not
responsible for defects that may be attributed to improper installation or the negligence of other parties, suitability
of structure, substrates or adjoining work or materials.
Compliance with codes, standards, and sound industry practices
The customer (and/or) installer is responsible for proper installation of the roof in accordance with the erection
drawings and this installation guide, and other good construction practices as well as code compliance. In the case
of tested and rated panel systems, it is the responsibility of the customer to see that actual construction complies
with the tested and rate assembly in every detail.
• Panels should be installed straight and accurately.
• Roof clips shall allow for thermal movement and must be installed in strict accordance with Mueller erection
drawings with respect to type and quantity of fasteners as well as clip spacing along the panel seam.
• Thermal movement of panels must be considered when attaching to adjacent constructions and materials.
• All areas of roof must have positive drainage of 3:12 pitch minimum and not allow ponding in any area of the roof.
• Compatibility of adjacent materials (not furnished by Mueller) should be verified.
• No penetrations whatsoever shall be placed in the panel system by fasteners or other roof ancillaries except as
shown on the erection drawings.
• Only Mueller furnished or approved sealants shall be used, and only as shown on drawings and within this manual.
• Some field cutting and fitting of panels and flashings is expected and considered part of normal installation.
• “Oil Canning” of the flat portion of metal panels is inherent to metal panels and a common industry phenomenon.
It shall not be considered cause for rejection.
• All flashings, closures, and accessories shown on the erection drawings shall be provided by Mueller unless noted
otherwise. Installation procedures shall be in accordance with Mueller printed instructions, details, approved shop
drawings and the highest industry standards and practices.
Trade Knowledge and Practices
The customer (and/or) installer of the roof system is responsible for the safe execution of the work. Metal roof
installation is a skilled craft requiring considerable trade knowledge and experience. Such knowledge and experience
includes general rooftop safety, as well as knowledge of the hazards associated with metal roofing, and the tools and
equipment associated there-with. This manual is intended to describe the sequence and proper placement of parts.
It is not the intent or purpose of this text or Mueller, Inc. to train individuals for the craft of Metal Roof Assembly,
or to convey all necessary trade knowledge and practice of metal roof installation. Although some general safety
comments is offered in the following text, it is not intended to prescribe comprehensive safety procedures.
If the installer cannot safely assemble the roof in accordance with these instructions, it is the responsibility of the
installer to stop the work and determine alternate safety assembly procedures.