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DURO-GUARD DEXCELL GLASS MAT 5/8-INCH ROOF BOARD
Installation: Storage:

 In steel deck applications, refer to Table 1 for  Must be protected from open flame and kept
flute spanability. dry at all times.
 Panels must be kept dry before, during and  Factory applied packaging is intended only for
after installation. Install only as much insulation protection during transit. Slit or remove the
as can be covered the same day with packaging to prevent accumulation of
completed roofing. condensation.
 The use of multiple layers of insulation with  Store elevated (at least 3 inches) and
joints staggered a minimum of 6 inches completely covered with a weatherproof
between layers is recommended to eliminate covering such as a tarpaulin.
thermal bridging.
 Do not use panels which are wet or
 Abut panel edges loosely (minimum of 1/16- damaged.
inch gap on all sides) and stagger joints of
adjacent panels. Gaps may need to be larger  Refer to PIMA Technical Bulletin No. 109:
depending on factors like roof deck size, Storage and Handling Recommendations for
membrane color, deck surface temperature and Polyiso Roof Insulation for additional guidelines
time of year the roof assembly is installed. (www.pima.org).
 Gaps must be no greater than 1/4 inch around Limitations:
all penetrations.  Duro-Last, Inc. will not be responsible or liable
for any defects or problems related to building
 Refer to the appropriate Duro-Last roof system or roof design by others, to deficiencies in
specification and detail drawings for deck
preparation and attachment requirements. construction, to dangerous conditions on the
job site, or to improper storage, handling or
 Precautions must be taken to ensure that new installation by others.
concrete decks have fully hydrated and do not  Utilize DEXcell FA Glass Mat Roof Board or
continue to release moisture. DEXcell Cement Roof Board for adhered
installations.
Panel Attachment:
 Utilize DEXcell Cement Roof Board for covered
 Panels may be attached to the roof deck using roof installations (e.g. vegetative, paver,
mechanical fasteners. Utilize DEXcell FA Glass ballast, photovoltaic, etc.).
Mat Roof Board or DEXcell Cement Roof
Board for adhered installations.
Mechanical Attachment

 When installing multiple layers (which may
include insulation, cover boards and thermal
barriers) it is acceptable to mechanically secure
through all layers.
 Use fasteners and plates supplied by, or
approved by Duro-Last, Inc.

www.duro-last.com 2 of 2 800-248-0280

Duro-Last, Duro-Guard, Duro-Bond and “World’s Best Roof” are registered marks owned by Duro-Last, Inc.
RoofNav is a registered trademark owned by FM Global.
Created: 01/18/2016