Installation instructions - flat roof, Sub-structure requirements, Importance of sheet drain – AZEK Pavers User Manual
Page 9
Page 9
Installation Instructions - Flat Roof
IMPORTANT: AZEK Pavers are a luxurious, low-maintenance covering that installs over an
existing or new flat roof. AZEK Pavers are not a structural replacement for flat roof surfaces, and
are not suited for all flat roof applications. Please consider wind-uplift and fire rating guidelines,
along with the weight capacity of the roof when designing a project. Always consult your AZEK
Representative for the recommended rooftop adhesion guidelines for your specific project.
IMPORTANT: AZEK Pavers are designed to be a flat roof covering installed over a
waterproofed, structural flat roof surface. AZEK Pavers are NOT a structural replacement for
flat roof surfaces, and therefore, should NEVER be used as the structural element of the roof,
as a ballast system, or in pedestal applications. Prior to installing, be sure to verify that the flat
roof can support the addition of AZEK Pavers.
• The roof structure must meet all required codes.
• The system is designed for installation over a “low-sloped” roof (between 1/8" per foot and 1/2" slope
per foot).
• The rooftop surface must have adequate drainage to meet local codes.
• The surface must be free from substantial undulations or “waves”.
• Door and other thresholds must be able to accommodate the minimum added height.
Sub-Structure Requirements
PAVERS ONLY
DRAINAGE MAT
COMBINED HEIGHT
(Installed on Grids) (American Wick SiteDrain 186) (Pavers & Drainage Mat)
RESURFACING PAVERS
1.75"
0.44"
2.19"
STANDARD PAVERS
2.38"
0.44"
2.82"
A drainage mat is required for flat roof applications over waterproofing membranes. It serves to both
protect the membrane from abrasion and allows a pathway for water to escape to the drains. AZEK
Pavers recommends using American Wick SiteDrain 186 or another comparable sheet drain.
**Helpful Hint: For small undulations in the flat roof surface, scrap pieces of rubber membrane can be
used as shims. This will help create a smoother top surface once the AZEK Paver system is installed.
Importance of Sheet Drain