Roof Elements That Requires To Be Mechanichally Attached

Versiweld mechanically attached guide 7 2020 1.

Roof elements that requires to be mechanichally attached. State that if a mechanically attached roof cover is being used that the prescribed thermal r value shall be increased by 50 percent. It s the simplest and lowest cost way of applying a heat welded single ply system that can practically be installed year round with warranties of up to 30 years. We actually use 6 one at each corner and then one at the middle of both edges. In this case there would be one fastener in the middle of the board and one at each corner.

This guide spec is a brief outline of versico s versiweld mechanically attached roofing system requirements and is intended for use as a submittal with a bid package. Mechanically attached roofing systems are ideal for many different types of buildings and can be an economical solution where conditions are suitable. Sheets of insulation are laid out on the decking and fastened according to the system specifications. Stress plates and screws are used to fasten the membrane in place.

For example a typical mechanically attached roof may only require 5 fasteners per each 4 x 8 insulation board which is secured to the substrate. Refer to the tpo pvc attachment table for mechanically attached systems in the guide for complete requirements. The mechanically attached roofing system is not acceptable for installations on steel decks lighter than 22 gauge. State that if a mechanically attached roof cover is being used that an air barrier below the insulation must be used and that it shall be fully adhered to penetrations and roof perimeters.

The maximum recommended roof slope for mechanically attached roofing systems is 18 in one horizontal foot. There are no maximum slope restrictions for the application of the fully adhered roofing system. For roof membrane fastening stress plates shall be two inch 2 3 8 o d. Center hole as supplied by tremco inc.

When adhered the insulation layers are glued down using ribbons of foam adhesive. Mechanically attached insulation is the most common installation method we see. The system uses a roof membrane mechanically attached to the roof surface insulation attached to the deck and a vapor retarder. G u i d e s p e c versiweld tpo mechanically attached roofing system july 2020.

If the membrane is also mechanically attached only five fasteners per 4 x8 board are required since the membrane has its own fasteners. Mechanically attach membrane with screws and plates to the substrate at locations of deck slope changes in excess of 1 12. Fasteners shall be as listed on the current approved fastener. The membrane is fastened to the roof deck by powerful adhesives.