13
Sunbank Installation Manual
6. Reinforce Roof
Whether or not it is necessary to reinforce the roof depends on the existing roof structure. A structural
engineer is qualified to assess a roof and to prescribe reinforcement measures that must be performed
before installation. We recommend structural engineering for all roof mounted projects and it is often
required for a permit. Send us an email for a structural engineering referral.
7. Strapping the Tank
For all installations, but especially those in areas prone to earthquakes or hurricanes, we recommend
the installation of 304 stainless steel strapping. The purpose of this is backup protection to keep the
tank on the roof in the case of a catastrophic event. It should be directly connected to the steel strut
or a lagged roof attachment using stainless steel hardware. Shown below with silicone
“
plumber
’
s
tape
”
underneath the strap.
8. Roof Penetration
If your installation involves penetrating a roof, you will want to make sure that you have the right
hardware to get your roof sealed up correctly.
“
Oatey Solar Flashings
”
(leftmost) are available at local
hardware stores, the flexible part of this flashing can break down over time with UV exposure. A
¾”
cone flashing (middle) is a more robust option. Other options include the Quickflash A/C U-C (right),
Quickmount Q-Box, and Soladeck. Flash correctly with M-1, Vulkem, or equivalent structural adhesive.