Flex TPO PLUS Mechanically Attached - Manual

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Flex Membrane International Corp. 2670 Leiscz’s Bridge Road, Suite 400, Leesport, PA 19533 Tel: 610-916-9500 Fax: 610-916-9501
FLEX TPO PLUS
MECHANICALLY ATTACHED ROOF MEMBRANE
INSTALLATION GUIDE
This guide is intended to be a point of reference in assisting the Flex Authorized Applicator with installing
the Flex Thermoplastic Roof System in accordance to the basic requirements of current Flex Details and
Specifications for acceptance of the installation for a roof warranty application. The installer should
always refer to the project specifications for details and application requirements for each unique roof
system installation.
1.0
Substrate Preparation:
Defects in the substrate surface must be reported and documented to the Building Owner’s
Representative for assessment. The roofing contractor shall not proceed with the roof system
installation until the defects in the substrate have been corrected.
A. Recover or Retrofit Roofing Applications: The project specifier shall identify
damaged or wet insulation areas. The insulation as indicated shall be cut out and
removed from the roof area. The removed insulation shall be replaced with new
insulation of the proper size to fill the space (flush with existing surface ± 1/4”)
and obtain a relatively smooth surface acceptable for the installation of the new
roof system.
B.
Existing Single Ply Roof Membranes: If the existing membrane is to be left in place, it
must be cut into sections no larger than 100 square feet per each section. All flashing must
be removed at the perimeter edge, roof drains and roof penetrations.
C. Gravel Surfaced Built Up Roofing: The loose gravel must be removed either by
vacuuming or power brooming. The surface must be leveled to prevent the
insulation or recover board from bridging.
D.
All Projects: The substrate must be smooth and relatively even without high spots or
depressions. Any accumulated water, ice or snow must be removed to prevent
the absorption of moisture in the new roofing components and roofing system.
The substrate shall be clean and free from debris and any other foreign material.
1.1
Vapor or Air Barrier Installation:
Install the barrier in accordance with the manufacturer’s written instruction and the
project specifications for the installation of the specified product.
1.2
Wood Blocking:
A.
Install wood blocking as indicated by the project specifications and in accordance with
current Flex Details and Specifications. Blocking is always required at roof edges and roof
penetrations.