Any rotten or damaged boards must be replaced before applying new shingles.
Roofing recovery board definition.
The cover board should be secured to the bottom layer of insulation in a full and even application of hot asphalt applied at a rate of 30 pounds per square or specially formulated adhesive.
Recovery board is designed to save people time and money when it comes to redoing a roof.
A recover application where the board is installed directly to an existing roof system to provide a suitable substrate for the new roof system.
Manufactured and tested for use in recover applications.
Cover boards should be set over the bottom layer of insulation.
Cover boards have historically had two uses.
Fully adhered cover boards should be applied in accordance with proper roofing procedures.
It is treated for surface retention of bitumen and available in 2 x 4 0 6m x 1 2m 4 x 4 1 2m x 1 2m and 4 x 8 1 2m x 2 4m with a nominal thickness of 1 2 13mm.
The building is more susceptible to hail fi re and wind damage.
Acfoam recover board is used in built up bur modified bitumen mechanically attached single ply and adhered single ply roofing systems.
The major advantage to this approach known as recovering is the cost savings associated with not having to remove and dispose of the existing roof membrane.
To prevent blistering with built up roof membranes bur and to provide a separation layer and flat surface in re cover situations.
In addition national roofing contractors association nrca has issued bulletins over the years recommending the use of cover boards to minimize damage to polyiso.
For best roof performance consider re decking board roof decks with a layer of apa the engineered wood association grade plywood before installing new shingles there are more than two layers of existing shingles on the roof.
Insulation can be flammable so installing a cover board can help deter the spread of fire from outside the building to the insulation and into your building.
The installation of a new roofing system over an existing roof is if viable an alternative approach to roof replacement.
Using recovery board foam provides a protective covering and insulation to help reinforce and strengthen any roof.
Energyguard perlite recover board is a heavy duty 1 2 thick perlite roof insulation board composed of expanded perlite cellulose binders and waterproofing agents.
These roofing systems depend on proper installation for successful performance.
However the use of a cover board far exceeds that of a substrate it also serves as a critical component that helps to extend the life of a roof.
A cover board is a thin substrate to which a roof membrane is adhered.
