Bill Leys Ten Commandments of Deck Waterproofing (for Builders)

Having been i n the waterproofing business now for over 5 years, I see the same errors made over and over.
In order to assist builders and consumers,I have developed what I call the Ten Commandments of Deck Building for Waterproofing.
Easy to follow, easy to understand, set these basic principles in stone and don't waver from them when working with your clients, you'll help protect yourself, your deck contractor and most importantly, your client.

1) Thou shall build thy deck with framing suitable to sustain the maximum load that 12)will be placed upon the deck.
2) Thou shall rip thy framing to provide slope of ¼” per foot.
3)Thou shall only use exterior grade plywood substrate. (5/8” minimum, ¾” preferred, blocked and glued) (Thou shalt not covet thy neighbors OSB sheathing.)
4)Thou shall use screws or ring shank nails only with glue and blocking.
5)Thou shall gap thy plywood to allow for expansion/contraction.
6)Thou shall raise door thresholds a minimum of ¾” above the highest point of the deck.
7) Thou shall not penetrate the deck with railings or bases if possible.
8) Thou shall build thy walls straight and true so that flashing can be installed tight against the wall.98) Thou shall flash the door(s) to the deck with door pans tied into the L flashing.
9) Thou shall provide a stucco stop on the outside edge for drip flashing to terminate over the siding.
10)Thou shall install Quickflash Products to all exterior HVAC, electric, gas and plumbing penetrations on contiguous building materials above the deck.

FREE EXTRA BONUS COMMANDMENTS!
11) Thou shall not run downspouts onto decks from roofs above and expect scuppers or drains to drain off all the extra water.
12) Thou shall install all building materials in a weatherboard fashion to ensure water is properly channeled away from the building’s interior.
13) Thou shall not caulk to the materials of other trades to terminate waterproof deck coatings as a substitute for flashing, as flashing is the only industry accepted method to waterproof all deck terminations including doors, deck to wall, handrail posts; door thresholds, etc.