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Composite Decking And Felt Paper

 
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Old 05-21-2015, 05:25 PM   #1
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Composite Decking And Felt Paper


Are there any negative consequences if you lay a composite decking over joists that have a 15lb felt cap, staining, chemical reaction, etc?
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Old 05-21-2015, 05:28 PM   #2
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Re: Composite Decking And Felt Paper


Exactly what would your reasoning be for doing something like that?

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Old 05-21-2015, 05:53 PM   #3
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Re: Composite Decking And Felt Paper


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Originally Posted by killerdecks View Post
Exactly what would your reasoning be for doing something like that?
I have a project with a customer who can only be described as stellar. Part of this project is to strip a 10 yr old deck of the luan decking, pine trim and modify the stairs. The decking and guard rails are being replaced with TimberTech products and the trim is replaced with Kleer pvc boadrs.
The frame is 100% solid. However its 10 yrs old. I would like to add a simple extra layer of protection to the flat surfaces of the frame.
I dont generally deal with synesthetic or composite decking. So I want to be sure that there will be no negative consequences.
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Last edited by JAH; 05-21-2015 at 06:27 PM.
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Old 05-21-2015, 06:05 PM   #4
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Re: Composite Decking And Felt Paper


Just rebuild the frame, it's faster to cut the thing down in sections, and reframe than to pull all the old decking off.
You customer is expecting to get 25 more years out of this. A 10 year old frame, at age 35 will never be as tight as a 25 year old frame. It has lots of nail holes in it now. To reuse old floor joist you will now have 2 x as many nails holes in it as before. All this so you could save $500 on the framing?
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Old 05-21-2015, 06:17 PM   #5
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Re: Composite Decking And Felt Paper


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Originally Posted by killerdecks View Post
Just rebuild the frame, it's faster to cut the thing down in sections, and reframe than to pull all the old decking off.
You customer is expecting to get 25 more years out of this. A 10 year old frame, at age 35 will never be as tight as a 25 year old frame. It has lots of nail holes in it now. To reuse old floor joist you will now have 2 x as many nails holes in it as before. All this so you could save $500 on the framing?
The deck frame is beyond my control, its 100% solid. We built this house about 10 yrs ago. At the time we would end prime most of the deck joist and posts , I chit you not. If the frame was no good we would of replaced it. Beside this is just part of the project. We removed the small deck on the back, its getting replaced with a covered deck. The front porch is also getting a new set of stairs.
In 20 yrs this deck will have already been replaced with the latest, greatest deck products.
Will there be negative consequences if a composite is laid over felt paper?

Last edited by JAH; 05-21-2015 at 06:26 PM.
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Old 05-21-2015, 06:27 PM   #6
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Re: Composite Decking And Felt Paper


I do not know of any reaction. I usually put a strip of Vycor on top of the joists. This is to seal the top of the joist if it splits. I think it will outlast the tar paper. Not sure of any reaction. I have heard that Vycor can attack some vinyl window frames.

My vote is to not worry and put in the paper. Then get back to us if there is a problem......
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Old 05-21-2015, 06:40 PM   #7
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Re: Composite Decking And Felt Paper


I usually do vycor as well on the top. They used to make rolls of felt for running over the tops of joists. Haven't seen them in awhile. I will also wrap the joists where hangers are. I wrap top down though and not bottom up as the vycor can peel back at the top and actually trap water.
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Old 05-21-2015, 06:46 PM   #8
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Re: Composite Decking And Felt Paper


http://www.weatherblocsystems.com/we...%20Covers.html
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Old 05-21-2015, 10:40 PM   #9
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Re: Composite Decking And Felt Paper


I use vycor for this. I think it bites a little better around the screws. I'll usually have my laborer cut a roll of the wider stuff into 10' lengths and then rip it down to 2" width. I just snap a chalk line on a scrap board, laid flat, and stick a utility knife into the board 2" from the snap line. I'd like a tablesaw for vycor. All you have to do is pull it through and keep the edge fairly close to the snap line.
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Old 05-22-2015, 01:03 AM   #10
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Re: Composite Decking And Felt Paper


So what I'm hearing is vycor fixes old floor joists?
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Old 05-22-2015, 06:11 AM   #11
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Re: Composite Decking And Felt Paper


In a matter of speaking yes.
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Old 05-22-2015, 06:55 AM   #12
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Re: Composite Decking And Felt Paper


Get pipe wrap tape, almost the same as vycor and comes in 2" rolls, no paper to pull off either.

Just use steel for the frame and never worry again.
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Old 05-22-2015, 04:19 PM   #13
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Re: Composite Decking And Felt Paper


Found a case of zip tape in the shop this am and used it to cap the joists.
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Old 05-22-2015, 05:55 PM   #14
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Re: Composite Decking And Felt Paper


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Get pipe wrap tape, almost the same as vycor and comes in 2" rolls, no paper to pull off either.

Just use steel for the frame and never worry again.
Great idea, I'm going to use that.
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Old 05-22-2015, 06:10 PM   #15
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Re: Composite Decking And Felt Paper


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So what I'm hearing is vycor fixes old floor joists?
I've done three re-decks. In each case, the framing was in excellent shape, flat and up to our requirements, or close with a little blocking and some additional ledgerloks. I use the vycor to seal up the old screw holes and give a little extra protection.

The first one was 20 years ago. They tore it down two years ago and the framing was still in good shape. The mason commented on it. He said there was virtually no rot anywhere.
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Old 05-22-2015, 06:22 PM   #16
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Re: Composite Decking And Felt Paper


sounds good to me
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Old 05-22-2015, 06:42 PM   #17
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Re: Composite Decking And Felt Paper


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I've done three re-decks. In each case, the framing was in excellent shape, flat and up to our requirements, or close with a little blocking and some additional ledgerloks. I use the vycor to seal up the old screw holes and give a little extra protection.

The first one was 20 years ago. They tore it down two years ago and the framing was still in good shape. The mason commented on it. He said there was virtually no rot anywhere.
The framing on a lot of decks out here are still in great shape. Here in the land of no moisture.
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Old 05-22-2015, 06:43 PM   #18
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Re: Composite Decking And Felt Paper


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Originally Posted by Californiadecks View Post
Great idea, I'm going to use that.
..yea..that's unusual for him..
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Old 05-22-2015, 08:10 PM   #19
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Re: Composite Decking And Felt Paper


I'd think that the joist spacing is a little wide to go from wood to synthetic...

Felt paper (or whatever you want to call it) will stain the synthetic decking. It also stains the wood deck boards.
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Old 05-22-2015, 08:13 PM   #20
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Re: Composite Decking And Felt Paper


Up here, there's a PT deck that was redecked 30 years ago. The framing was still good 5 years ago when I checked during a deck board replacement. That was tar paper over the joists.

I'm close to the ocean, so people can and do get marine rated PT - no way for me to tell if it was marine rated, but it has been there 50 years or so, same frame.

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