I am building a 600 square foot deck with a sheltered barbecue area underneath. I would like to put a rubber roof down with sleepers and correct deck. What would you recommend to put down under rubber and over plywood? Is it necessary to glue down rubber? thanks for all help. greg in Connecticut
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Yes, glue it down. There is possibility for ballasted rubber roofs but it is not appropriate for you.
It can be glued directly to the plywood but it is better to follow the slip sheet principle and use a barrier layer. There is a gypsum product that one of my roofers uses and a fibreed insulation board that another one uses.
On a job I am doing, the rubber is down and I will be starting the sleepers and deck this week, so i will try to remember and post photos of the progress.
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I am starting a 6 x 8 porch this week with a deck above including railing & plastic floor over edpm . can the edpm be run up the posts & covered with post sleeves to prevent leakage ? in your pictures it appears the edpm is running down over the shingles and capped by the flashing does this allow the water to run under the flashing & down to the gutters?
With all roofing you follow the rule that all laps must face downhill.
On this we ran the shingles first, then the rubber lays over the break with the edge flap down about four inches onto the shingles.
Then you get the cosmetic of the flashingwhich ahs a five inch exposure with hem. The upper break of the metal is four inches onto the flat of the rubber and nailed about every six or eight inches. Then the 8" Neoprene flashing rubber made for EPDM is aplied over it with four inches onto the EPDM and four inches on the flashing. All edges of the Neoprene caulked for insurance. If a drop or two of water gets paast the neoprene and under the metal, it still has the flap of EPDM running our over the shingles to guide it out and down.
Posts - I don't believe that any post should ever penetrate the roof membrane, no matter what kind of roof surface it is. Suppose that the post itself developes a check to let water into it. That becomes a pipeline to leak to the interior if the roof membrane is not under it. If you are mounting the posts to the roof instead of on the deck above, as I am, you should do the roof first, then mount the post, then flash the post.
I use a torsion box type post mounting syustem to secure posts to decks for resisting forces that might push against the railing. It is mounted to the floating wood deck above and never penetrates the roofing.
I don't know what the plastic material is that you mention
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I use a torsion box type post mounting syustem to secure posts to decks for resisting forces that might push against the railing. It is mounted to the floating wood deck above and never penetrates the roofing.
Piff, I sure hope you are going to share this one....
carpenter in transition
It is not an uncommon method, Tim.
I think a sketch can be found at the Fyupopn webnsitre but others use it too.
Your post is hollow.
A mounting plate inside of it has a base about 4" square with holes near the edges for screws into the deck. The very center of it is threaded for "wall bolt" or "allthread" however long the post is tall.
Another bracket at top of post fits over a slot or fitting so that as a nut is tightened, it draws the post tight to th e deck beneath. It gets very secure as the tension on the allthread increases.
You have tension on the thread and compression on the post box resisting one another to stabilize the post.
There are other types of post settings developed. I remember an ingenious one shown here on Bt a couple years ago.
Another is a flange that the post seas down into but that looks ugly and unrefined to me. Another one is a "T" that screws down to th roof on caulk and the leg standing up inserts the sssolid post with a set screw. Also, Simson strontie has a post mounting brackeet for applications like these.. ..There is lots of hardware solutions aailable without penetrating the membrane. Is there a need for an article on this? I thought it was more common knowledge.
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thanks for your reply the posts i refered to are 4x4 pt using a plastic sleeve over them , the plastic sleeve is not a tight fit hence my idea of running the edpm up the post & the sleeve over it , there is a water tight cap on top of the post. the railings are a plastic square tube with a galvanized steel channel inside fastened with ss screws to the posts .i have used these railings for the last few years but never on a roof. the job site is a rental unit hence the concern about secure mounting.
That sounds to me like it would work fine, The PT post gives the structural support and can tie into the framing below for stability, then the rubber runs up it as a base flashing, and the plastic sleeve acts as a counterflashing. All laps face downhill.
I originally understood the "plastic" to be some sort of roof surface material from your post above. I did a shower enclosure (exterior) with a similar system. Easy to do and eliminates the perpetual painting problem for owners who can afford it.
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Piffin- Thanks for the insight on the Rubber roof installation. I will be using Post system from Fiberon, which I suspect is very similiar to the fypon details, you mentioned .If i didn't know better, I would think you worked for breaktime full time.I appreciate the time and effort you put into your responses.
greg in connecticut
Thanks, now go remind them that my check is late this month,
;)
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May I remind you, Mr. Piffin, that according to the signed contract we have with you, that we do not mail paychecks until the aggregate total is above $1.00. Thus, you can expect to recieve your monthly pay ca. 9/2008.
Paymaster, BT.
Is the #11jpg picture top down shingled?
I've never top downed. The roof was ready for shingles while the weather was still to cold for EPDM on the flat roof so we left a few shigles out at bottom to back lay later.
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All I got finished this week was the frame setup. (remember I manage the whole job too.) so the deck on will be next week
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Another way of installing posts is to install 4x4 lagged into low sloped roof framing and the install fiberboard insulation and .o6o base sheet and install pitch pans around the posts and fill with an epoxy pourable sealer. The pan is then wrapped with uncured. This alows the post to expand and contract and is the strongest way to tie in any railing system I have seen
Good point on wrapping the post and installing a water proof cap
We used to do pitch pans with built up roofing but I hadn't ever seen that carried into the EPDM materials. it is one that';s a bit hard to explain to the uninitiated.
my concern when the post penetrates the whole assembly is that when the wood post checks, it allowe=s for a pathjway that water can follow ionto the structure. That plastic shroud and cap takes are of that problem.
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