Common Fastener Problems to Avoid When Installing Solar Panels

All contractors face a set of common fastener problems on every jobsite. Some are universal across the construction or home improvement industry, others are more specific to their industry or field. The solar energy industry deals with a wide range of unique and specially designed innovations that present fairly distinctive problems to the installation contractors.
Are you a homeowner having solar panels put up? Or perhaps you're a contractor getting established in this growing industry. In any case, having a heads up about the fastener problems that often occur when installing solar panel systems will help to make this project (and all similar projects) more efficient and affordable.

Common Issues
Embedment - This deformation occurs on plastic and is localized, often where clamping or over-tightening exist. Be sure to torque all fasteners precisely, following manufacturer directions, in order to avoid embedment.
Galling - If you plan to use stainless steel nuts on stainless steel bolts, be aware that galling may occur. This wear happens when two surfaces (of prone materials) slide while contacting each other. Galling also happens with zinc coated nuts and bolts as well as titanium fasteners.
Threads Nicked - Avoid using bolts or screws with excessive nicks in the threads. This occurs during transport and tends to be more prevalent in bolts of a larger diameter. Nicked threads can compromise a joint and result in damage or premature wear.
Relaxation - This condition creates a looser joint and most often occurs as a result of embedment. High temperatures may cause relaxation, which is defined as a loosening of the bolt without any movement in the nut.
Broken or Lack of Seal - When the wrong type of amount of adhesive is used on the solar panel, a seal cannot be maintained. Always inspect the panels before mounting them to ensure that a complete seal is present. It's a good idea to inspect them again once mounted.
Roof Leaks - In some cases the fasteners used to secure racking or mounting rails will need to penetrate the roofing materials. Unless proper care is taken, this can result in roof leaks at the joint.
Talk to an experienced installer or fastener expert about the common fastener problems you're bound to face when installing solar panels. These systems must be reliable and secure in order to function well, and the installation procedure plays a key role in solar panel performance.