 Description
Recover Board is a heavy duty 1/2" thick Permalite¨ roof
insulation board composed of expanded perlite, cellulose fibers, binders, and water
resisting agents. It is treated for surface retention of bitumen and available in 24"
x 48", 48" x 48", and 48" x 96" boards.
Uses
· In reroofing, as a base for a variety of membranes installed
over failed or worn out roof systems.
· As a top layer in two layer systems.
· To separate a new membrane from a rough or irregular deck.
Advantages
· An economical base for recovering.
· Protects new roofs from old roof problems.
· Lower installed cost than tearoffs.
· Dimensionally stable.
· Resistant to water penetration and traffic damage.
Applicable Standards:
· ASTM Standard C728
· UL Class A construction on non-combustible roof decks. Where
UL labels are required, customer must so order in advance.
· FMRC Approved (1-60 and 1-90) when fully adhered. Consult GAF
Materials Technical Services Department for latest approvals.
Application
Securement of Recover Board can be by mechanical fastening or hot asphalt. If the deck is
non-nailable, strip mopping is recommended to allow for moisture pressure release. Solid
mopping with asphalt should not be used for recover applications.
Mechanical Attachment
For exact fastening recommendations, consult the GAF Materials Corporation GAFGLAS® or RUBEROID® Application and
Specifications Manuals.
Limitations
Old roofing systems MUST be thoroughly dry and secured before Recover Board is applied as
part of a recover roof system.
Recover Board is NOT acceptable for applications where it will be
directly exposed to continuous soaking temperatures of greater than 250°F.
| Thermal Values |
|
C-Value |
R-Value |
lbs./ft2 |
| 1/2" |
.76 |
1.32 |
.50 |
| Note: Thermal properties shown are based on data obtained under controlled
laboratory conditions and are subject to normal tolerances. Technical
information is detailed under Permalite Roof Insulation section. |
|
