Flex FB 50 PVC - Manual

Flex Membrane International Corp. 2670 Leiscz’s Bridge Road, Suite 400, Leesport, PA 19533
Tel: (610) 916-9500 Fax: (610) 916-9501 www.FlexRoofingSystems.com
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Product Data Sheet
FLEX FB 50 PVC ROOF SYSTEM
(76” and 120” Wide, Reinforced, Thermoplastic Roof Membrane)
PRODUCT DESCRIPTION
The Flex FB 50 PVC (polyvinyl chloride) Roofing Membrane is a high-performance thermoplastic
membrane designed for mechanically attached or adhered roofing applications. The Flex FB 50 PVC
Roofing Membrane is manufactured in a thickness of 50 Mils of polyester reinforced membrane with a
5.50 oz. polyester fleece backing.
For re-roofing installations, the fleece backing serves as a separation or cushioning layer between the
membrane and a pre-existing, smooth built-up or cap sheet surface, including structural or lightweight
concrete decks and various types of insulations. In adhered and mechanically attached applications, the
Flex FB 50 PVC Roofing Membrane can be installed directly over most substrates with excellent results.
FEATURES AND BENEFITS
The Flex FB 50 PVC Roofing Membrane has been specifically designed for use over minor
imperfections, splits or ridges that may have formed in the existing roof system. The fleece backing acts
as a cushioning layer which prevents abrasion problems and keeps small imperfections or ridges from
coming in contact with the membrane, eliminating the need for insulation or slipsheets.
The unique combination of the quality performance and longevity of the Flex FB 50 PVC Thermoplastic
Roofing Membrane with the durability and added protection of the fleece backing provides the building
owner with an unmatched, superior roof system.
MECHANICALLY ATTACHED INSTALLATIONS
The Flex FB 50 PVC Roofing Membrane is ideal for use as a mechanically attached membrane over
approved existing roof surfaces. The fleece backing minimizes the effect of minor imperfections in the
substrate, which greatly improves the overall aesthetic appearance of the completed project and eliminates
the need for insulation in most cases.
ADHERED INSTALLATIONS
The Flex FB 50 PVC Roofing Membrane offers distinct advantages in adhered applications over
lightweight and structural concrete and a variety of insulation and deck types with proven results when
adhered with Flex’s WB (Water-Based) PVC Substrate Adhesive. The superior wind uplift performance
achieved by the Flex FB 50 PVC Roofing Membrane adhered roof system meets Factory Mutual's Class
1-270 over lightweight concrete, which allows for high rise and coastal region installations in the most
extreme weather conditions.