Flex TPO PLUS Mechanically Attached - Manual (Page 3)

8/2012 3
Note:
1. On projects where there are multiple roof levels and roof levels meet at a common
wall, if the difference in height of the roof levels is greater than 3’, the adjacent
edge of the higher level is determined to be the perimeter edge. The roof area of
the lower level where it meets the wall does not require perimeter sheets.
2. Expansion Joints, control joints, divider and fire walls in the field of the roof or
roof ridges with slopes less than 3:12 are not to be considered as part of the roof
perimeter.
2.01 Field Membrane Securement:
A. The field membrane sheets are positioned so that adjoining field membrane sheets
overlap 5 1/2” to 6” at those locations where fasteners and plates are located.
Typically along the length of the membrane.
B. The end roll sections are also mechanically fastened and overlapped 5 1/2” to 6” to
cover the fastener and plate and provide for an adequate hot air weld.
C. The membrane is secured at the approved fastener density with the appropriate type
of fastener approved for the deck and the wind uplift pressure resistance.
D. Unroll and position the sheet.
E. Install a fastener and plate in one end of the sheet on the appropriate fastener mark.
Go to the opposite end of the sheet and pull sheet into position along the lay line and
install a fastener and plate at the appropriate mark. Place the remaining fasteners and
plates.
F. Hot air weld the seam and continue in sequence installing the remainder of the sheets
across the roof area.
G. Additional securement must be provided at the perimeter of each roof level, roof
section, expansion joint or roof divider, all roof penetrations and curbs, adjacent
walls and at any angle change where the slope exceeds 2:12.
H. All seams must be completed by hot air welding the same day they are installed.
Thoroughly probe the seams with a seam probe and repair any voids or defects
discovered.
3.0
Flashing:
A.
General Flashing Conditions
Flex Reinforced Flashing Membrane is to be installed for the flashing of parapet
walls, roof equipment curbs, expansion joints and roof dividers, and for most other
roof detail flashing areas. Flex non reinforced flashing membrane may be used for
those areas where the use of pre-formed accessories cannot be installed such as
certain pipe penetrations, corners and scuppers details.
1. Re-roofing Flashing Conditions. Existing flashings must be removed prior
to installing the new Flex Flashing Membrane.
2. Termination Bar, surface mounted reglet or surface mounted counter
flashings must be installed directly to the wall surface.
B.
Application
Adhere the flashing membrane to walls, curbs and other vertical surfaces with Flex
Flashing Adhesive. The Flashing Adhesive is applied to both the membrane and the
surface to which it is bonded. The coverage rate is dependent on the type of substrate, but