Roof Tech Adds 72 cell module to Residential Rail-less Applications.

Roof Tech Inc. a global leader in the Rail-less roof top PV mounting systems has added engineering to support 72 cell PV modules or modules up to 21 sq. ft. The new engineering data was added to their already extensive engineering reports created by Starling Madison Lofquist, Inc., a well respected 3rd party firm that created the full reports from actual load testings. The simple to use tables are compliant with the IBC 2012, with values according to the roof zones, type of exposure and different attachment methods at different roof pitches. Astounding results with top basic wind speed up to 180 mph and Ground Snow loads up to 113 psf.

The PE reports include tables for rafter attachment (2"x 4", 24" o.c.) and direct to the roof decking (7/16" OSB and 15/32" Plywood thickness) applications which are not yet common to the US PV industry. Direct to deck attachment is a true game changer and helps to lower the time on the roof dramatically. Unlike the common method of securing a PV system with lag bolts, Roof Tech's approach is with the use of multiple 5mm stainless wood screws making the roof decking installation evenly secured. If the PV system needs to be secured to rafters, the overall installation becomes even easier to meet code because the 5mm screw will need to hit within 60% from the center of the rafter. A 5/16" lag bolt will need to hit within 30% from the center of the rafter which is a much narrower tolerance and therefore much more difficult to comply with the code.

At this time only the E Mount AIR is being certified for the use of 72 cell modules.

For more information on Roof Tech or to download the new PE reports, please visit or call (619) 551-7029

Featured Product



You haven't installed a tile mount that is easier to install than the Solar Tile Mount manufactured by TRA Snow and Sun. Solar Tile Mount is used on all tile roof profiles: flat, mid, and high. It is made in the USA of aluminum alloy for strength and excellent corrosion resistance. Solar Tile Mount is built to allow more ease in installation with more rise from the tile surface to the rail for better air flow below panels. The adjustable base is longer than most allowing attachment 6" to the left or right to have the bracket in the base of the pan of the tile and still fasten to the rafter. Solar Tile Mount is adjustable for counter batten systems from ¾" to 3". The horizontal rail is directly above base fasteners giving greater uplift resistance than any other system. For superior waterproofing apply TRA Snow and Sun's butyl backed VersaFlash aluminum flashing. No tile flashing is needed on top of the tile for greater labor and material cost savings.