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Need Help Fast Please! Boards On Concrete.

 
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Old 10-24-2014, 06:40 PM   #21
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Re: Need Help Fast Please! Boards On Concrete.


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There is no way to stand off the 2x4s on edge is there? Going to have to lay them down?
I'd most likely do it as jlsConstruction replied.
As for your question: I try to at least have a 3'' drop from door sill to deck boards, due to snow and flashing reasons. If you stand them upright, what is the difference then?

I have also had to go with a floating deck before(on rubber pads), due to a lot of debris falling on the deck(overhead trees). We've made them accessible to remove and clean out...However, that did have a rubber roof under it.

And a last bit of advice on any caulk you might apply: I would use(if available), "Water cut-off". It does not cure and lasts a long time.

Last edited by ObuckiO; 10-24-2014 at 06:45 PM.
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Old 10-24-2014, 07:42 PM   #22
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Re: Need Help Fast Please! Boards On Concrete.


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There is no way to stand off the 2x4s on edge is there? Going to have to lay them down?
Sure there is. Just frame it with the 2x on edge. If you're using standoffs then you'll have to put them every couple feet or the frame will sag. 2x4 has very little strength. I wouldn't bother with Simpson standoffs for that application. I'd probably use scraps of composite decking and make sure the frame was anchored at the corners to keep it from moving.

If you use T&G decking then you'll have very little water with a porch so I'd be comfortable with the flat sleepers. If there is a lot of opportunity for water and you have the height to put the 2x on edge and elevate it a bit then that would be my preference.
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Old 10-24-2014, 07:47 PM   #23
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Re: Need Help Fast Please! Boards On Concrete.


What does your gut tell you to do? Your experience? I did one recently with 2x sleepers. Worked fantastic. You should know what to do here.
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Old 10-27-2014, 09:17 AM   #24
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Re: Need Help Fast Please! Boards On Concrete.


FANTASTIC help! I won't mention names because there are too many. I think it's everyone here? Such wonderful generosity. I am very greatful!

If you are like me then you have seen things that have failed despite the best intentions. I have never seen this done before and didn't want to make a stupid mistake.

Thanks to the help and generosity of you all I'm confident that I can do this without making a stupid mistake. Actually, I think it's going to be frikken very nice and will be easy to maintain or repair!

I don't think someone is going to look at this a few years down the road and say, "what idiot did this?" LOL

Again -- THANK YOU!

Last edited by nailomatic; 10-27-2014 at 09:22 AM.
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Old 10-28-2014, 05:05 PM   #25
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Re: Need Help Fast Please! Boards On Concrete.


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Originally Posted by nailomatic View Post
FANTASTIC help! I won't mention names because there are too many. I think it's everyone here? Such wonderful generosity. I am very greatful!

If you are like me then you have seen things that have failed despite the best intentions. I have never seen this done before and didn't want to make a stupid mistake.

Thanks to the help and generosity of you all I'm confident that I can do this without making a stupid mistake. Actually, I think it's going to be frikken very nice and will be easy to maintain or repair!

I don't think someone is going to look at this a few years down the road and say, "what idiot did this?" LOL

Again -- THANK YOU!


Premonitions, I suspect.


I have done a couple of over-hard-surface decks (but never on a front porch). I built the decks in removable sections to make upkeep, feasible. They just laid there, (minimal fastening). Built cheap to be replaced cheap.

Also, cockroaches and other small critters just love the moist cool environment under those things. I would never build something like that for myself. JMO


(DIY ?)

...
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Old 10-28-2014, 05:19 PM   #26
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Re: Need Help Fast Please! Boards On Concrete.


I have done exactly what you are talking about.It was on my own home ,kind of an experiment. 2x4 pt on the flats,16 inch centers, pt plywood on top with ice and water shield over the plywood. I used Fiberon vinyl decking face screwed tight...no gap at all.Broke all the rules. Been installed for 5 years now with no sign of any problems. All boards are tight and secure.
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Old 11-01-2014, 11:18 AM   #27
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Re: Need Help Fast Please! Boards On Concrete.


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I have done exactly what you are talking about.It was on my own home ,kind of an experiment. 2x4 pt on the flats,16 inch centers, pt plywood on top with ice and water shield over the plywood. I used Fiberon vinyl decking face screwed tight...no gap at all.Broke all the rules. Been installed for 5 years now with no sign of any problems. All boards are tight and secure.
I'm not surprised that it's working. It just doesn't seem impossible to achieve a dry cavity under properly waterproofed plywood.

But one risk is that the boards are sitting flat against the plywood so water can get under the boards and just rot with no way to drip out.
Having said that -- shingles sit against water and ice shield and the plywood doesn't rot. But on the other hand, there is a slope and the water goes down hill. There is always somewhere for the water to follow gravity down and away.

A second risk is that there is no way for dampness to get out if it does find some way underneath.

Seems like the bottom line is that gravity isn't our friend on this porch.
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Old 11-01-2014, 11:31 AM   #28
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Re: Need Help Fast Please! Boards On Concrete.


Here is where I'm at.

Starting with the concrete.

The concrete has a good slope. Haven't measure it but it looks nice.

The porch is covered and is inset with walls along the back, right and left.

The threshold of the door is on the back wall and is about 7" above the concrete.

Start with a layer of 4 inch squares of 1/2 sill sealer laid on concrete 8" OC. Need to check the 8" to see if that's sufficiently close. This will allow water to run around the squares and out without getting blocked up agains the wall anywhere. That is, if water ever does get in, which if this hopefully works then it hopefully will not.

Then add a layer of 2x4 pressure treated boards laid flat on the sill sealer and screwed down with tapcons. The boards will mostly run parrallel to the wall in back of the porch with the door and some boards will run along the outside perimeter of the wall.

Install basement drain tile on the front vertical face of the concrete porch.

Install a composite fascia board over the drain tile. The top should be flush with the top of the pt boards.

Flash the wall from under the siding to down to the pt boards along the perimeter of the wall.

Screw tongue and groove composite porch boards on top of the pt boards.

Apply a bead of clear mastic like the "water cut off" mentioned above inside the board grooves before mounting. The boards will run perpindicular away from the back wall, following the porch slope down and away and will end over the fascia board.

Caulk between the wall and the porch boards.

The porch board layer will serve as the water proof layer. Everything really depends on it.

DISCLAIMER: I AM ONLY SAYING WHAT I AM GOING TO TRY. THIS IS NOT A RECOMMENDATION. THERE MAY BE BETTER WAYS. IT IS UNPROVEN. THIS DESCRIPTION MAY BE INCOMPLETE. I MIGHT BE WRONG. I MIGHT CHANGE MY MIND. I AM NOT SUPERVISING YOUR WORK. I DO NOT KNOW IF YOU CAN ASSUME THE RISK. DO YOUR OWN RESEARCH AND MAKE YOUR OWN DECISIONS. IF YOU DO THIS THEN IT IS AT YOUR RISK.

Last edited by nailomatic; 11-01-2014 at 12:20 PM.
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Old 11-01-2014, 11:59 AM   #29
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Re: Need Help Fast Please! Boards On Concrete.


You know what makes this tough?

Water flows downhill.

Bugs flow uphill.

LOL
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Old 11-24-2014, 03:56 PM   #30
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Re: Need Help Fast Please! Boards On Concrete.


ceramic wood looking tiles. The look of wood, none of the headaches.

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