Underneath the membrane there is usually a separation barrier and or some sort of insulation board.
Separation board in roofing.
This article explains the importance of fascia and soffit boards and how to maintain the joints where they meet.
Numerous studies show the value of cover boards in enhancing a roof cover s ability to resist damage by hail.
In re cover applications all wet areas of the old roof must be removed.
A cover board provides separation between a roof cover and insulation that may not be compatible or the attachment adhesive of the roof membrane is not compatible with the insulation.
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.
To prevent blistering with built up roof membranes bur and to provide a separation layer and flat surface in re cover situations.
It usually encases lights and internal gutter systems.
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.
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.
Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the calorimeter requirements for conventionally insulated decks.
Only product in the marketplace to offer prefabrication of the entire roofing system.
Properly installed energyguard perlite roof insulation is suitable for use under built up and modified bitumen roofing.
Most common insulation is iso or eps foam board.
Use a roofing knife to trim foam board or a fine tooth saw to trim rigid board.
3 0 oz yd2 102 g m2 needle punched non uv resistant polyester fabric.
Position the fastening plates over the insulation board.
Below the fascia is the soffit that face downward.
It is the most visible piece of the roofline.
Insert a plate every 2.
All loose and protruding gravel must also be removed.
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.
Roof membrane available in 40 50 and 60 mil thickness.
Cover boards have historically had two uses.
It is also widely used as a separation board over existing roofs in re cover installations.
In addition national roofing contractors association nrca has issued bulletins over the years recommending the use of cover boards to minimize damage to polyiso.
