Separation Board In Roofing

Most common insulation is iso or eps foam board.

Separation board in roofing.

It is also widely used as a separation board over existing roofs in re cover installations. 3 0 oz yd2 102 g m2 needle punched non uv resistant polyester fabric. This article explains the importance of fascia and soffit boards and how to maintain the joints where they meet. It usually encases lights and internal gutter systems.

In addition national roofing contractors association nrca has issued bulletins over the years recommending the use of cover boards to minimize damage to polyiso. Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the calorimeter requirements for conventionally insulated decks. Properly installed energyguard perlite roof insulation is suitable for use under built up and modified bitumen roofing. Position the fastening plates over the insulation board.

Cover boards have historically had two uses. Roof membrane available in 40 50 and 60 mil thickness. Jm 3 oz polyester slipsheet is intended for use as a separation layer between an existing roof system and a new single ply recover system. Duro last 50 mil membrane is manufactured with 28 mil of thickness on the top performance layer far exceeding industry standards as well as competitor systems with equal and even greater mil values.

It is the most visible piece of the roofline. In re cover applications all wet areas of the old roof must be removed. Numerous studies show the value of cover boards in enhancing a roof cover s ability to resist damage by hail. Use a roofing knife to trim foam board or a fine tooth saw to trim rigid board.

Trim the boards to fit as needed. Insert a plate every 2. Underneath the membrane there is usually a separation barrier and or some sort of insulation board. Tested in accordance with astm e84 its surface burning characteristics are flame spread 0 and smoke developed 0.

All loose and protruding gravel must also be removed. Only product in the marketplace to offer prefabrication of the entire roofing system. Single ply membranes are installed either as fully adhered or mechanically attached systems depending on each roof s condition installer s preferences and other factors. The fascia is the board along the bottom of a roof that faces outward.

Separator polyiso roof recover board typical physical properties test astm values strength tensile strength c 209 500 psf 24 kpa min compressive resistance 10 consolidation d 1621 20 psi 138 kpa min dimensional stability change length width d 2126 2 max moisture moisture vapor permeance e 96 1 perm 57 5 ng pa s m2 water absorption c 209 1 0 max.