Be happy to helpÃƒÂ¢Ã¢â€šÂ¬Ã‚Â¦ First may we start with your answers to the following 5 items :
1.What is the Size/Layout configuration of this new roof (Is the new redwood decking going to cover the roof area in itÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢s entirety)ÃƒÂ¢Ã¢â€šÂ¬Ã‚Â¦please describe?
2.Is this a new building or new roof level you are design/building with a plywood decking over wood roof joisting or are you removing an existing roofing system down to an existing plywood decking or are you recovering an existing roof with new plywood to act as a substrate for your new roofing systemÃƒÂ¢Ã¢â€šÂ¬Ã‚Â¦please describe?
3.Does or will this new or existing roof have definitive slope (if so what is it and is it one way/4 way etcÃƒÂ¢Ã¢â€šÂ¬Ã‚Â¦???)?
4.Does or will this roof have internal drains (size & how many)or is water run-off being directed to thru-wall or overflow type perimeter scuppers (describe which type)?
5.Are there many existing, new or planned future roof penetrations (describe type/size and number)other than those that you will most definitively need to lift,level and support your new raised redwood decking(we will discuss these new needed raised redwood decking posts/supports/columns etc. and there attachments/flashings subsequent to your reply posting)?
…So that we can further discuss your actual as is scenario(choice/type and application of new roofing and redwood decking including the configuration/placement/drainage of the planters proper, the possible need for additional R value insulation etc.etc.),I am anxiously awaiting your follow-up posting re: above needed info items ÃƒÂ¢Ã¢â€šÂ¬Ã‚Â¦*
Most all roofing systems whether they be Modified/EPDM/Built-up/P.V.C/Hot or Cold Liquid/ Hypalon etcÃƒÂ¢Ã¢â€šÂ¬Ã‚Â¦(whether Conventional type or in PRMA configuration)are good and acceptable for this application .ÃƒÂ¢Ã¢â€šÂ¬Ã‚Â¦to choose the most appropriate one, your budget, project access and number/type of penetrations and ability/configuration of structure to support new load weight will be the primary determinants.
This should Not be an issue being that new decking will protect projectÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢s new conventional type roofing membrane surface from degradation due to direct exposure (note: naturally, PRMA type systems are not affected by UV)
Possibly an issue for the redwood structure properÃƒÂ¢Ã¢â€šÂ¬Ã‚Â¦However, this is NOT an issue for the new membrane roofing systemÃƒÂ¢Ã¢â€šÂ¬Ã‚Â¦.This is Not an issue since new proper supports/columns/posts etc. for this new raised redwood decking structure that are and will be required will be directly set atop/securely affixed and appropriately pitch pocketed/flashed to the building/decking proper and this new raised redwood decking will be set-up atop these supports/columns
…Once again, we can specifically discuss this and the many other detailed scope items of work based on your choice/type of new roofing system, type/composition and configuration of support/columns/posts needed and required for new raised redwood decking and your follow-up answers to above requested 5 items of general needed info…