Can I use SIPO Dominos with AZEK trim and/or boards (Outdoor Application)?

Kevin D.

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Nov 27, 2009
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We just put in an above ground pool, and it requires me to build a deck all around three quarters of it.  I plan on using AZEK decking and also AZEK trim and boards for a variety of other non surface decking needs.  I would like to know if SIPO Domino's could be used for the AZEK trim and boards where possible or more practical and also what glue(s) would be appropriate?

See here for what AZEK boards are:  http://www.azek.com/azek-sheet/
 
I've used the sipo dominos for alignment purposes. Then I use azek glue or bond and fil epoxy to adhere the azek. If you want to glue the domi's use gorilla glue.
 
Brice Burrell said:
I've made my own Domino tenons out of Azek so they can be permanently glued in.

Just curious as to how easy or difficult it is to make your own Domino tenons?

In this case, I would think the Sipo's would be more than adequate for joint alignment and would never rot as the Azek glue literally welds the PVC trim together.  Of course the Azek domino tenons would give you a stronger joint which might be important given how much Azek trim shrinks and expands.
 
deepcreek said:
Brice Burrell said:
I've made my own Domino tenons out of Azek so they can be permanently glued in.

Just curious as to how easy or difficult it is to make your own Domino tenons?

In this case, I would think the Sipo's would be more than adequate for joint alignment and would never rot as the Azek glue literally welds the PVC trim together.  Of course the Azek domino tenons would give you a stronger joint which might be important given how much Azek trim shrinks and expands.

Your last sentence pretty much says it all.  It you're looking for reinforcement of the joint it's the only way to go.  If you only need alignment than a Sipo would work.  I don't bother to round over the edges so I just make the tenon as big as I can without having to round them over.  This doesn't allow for perfect side to side alignment without some manual adjustment but you still perfect alignment of the faces.   
 
I would use anything besides Azek.

I am sorry but I think it is way over priced and way over rated.
 
WarnerConstCo. said:
I would use anything besides Azek.

I am sorry but I think it is way over priced and way over rated.

Hey, it doesn't rot, I don't pay for it and it's what my supplier carries.
 
The house I'm working on now we used the Certainteed pvc trim because the rep said we would save all sorts of money, well it wasn't enough.  I think we spend over $15000 in pvc trim and saved about $800 on the certainteed trim compared to the azek.  The supply house didn't have everything in stock and it was a huge headache.  Azek is what we use a lot of and its fully stocked at the lumber yards so we use it.  The only thing I hate about the product is the dust, no matter how hard I try I get covered in it.

Dave
 
We just finished an install job where all the soffits were smooth azek.  The designer and owner refused to have any of the soffit runs broken up, so everything was scarfed and glued.  What a major PITA.  Part of our crew tried to start fitting the joints using a standard circular saw..... enter my TS75 to the rescue.  Thought it would be a way to get the boss to pony up the money for a TS55.  No, I just got the job of fitting it all.

Brice-- if your using the domino for alignment, I am assuming you are using butt joints?  If so, how do they hold up?  We had some sections of soffit that we were mitering both the long and short edges of the sheet.  I would have gladly brought out the domino too.
 
This is great feedback from all, including from WC, whom I respect his opinion.

While I'd be cutting a lot of the AZEK outside using my TS75 and CT, I may also be using my Unisaw and router table in my shop hooked up to my DC which has PVC ducting.  I'm assuming there's a heck of an issue with AZEK being "clingy" in ducts.  Is using my shop equip hooked up to my DC ill advised?
 
Kevin D. said:
This is great feedback from all, including from WC, whom I respect his opinion.

While I'd be cutting a lot of the AZEK outside using my TS75 and CT, I may also be using my Unisaw and router table in my shop hooked up to my DC which has PVC ducting.  I'm assuming there's a heck of an issue with AZEK being "clingy" in ducts.  Is using my shop equip hooked up to my DC ill advised?

the few times I was forced to do some mill work with it, it was stuck to everything.

I have metal ducting for my DC so I don't know about that part.  I would think you will get some cling and static build up.

If you want a man made product, I really like Fiberon decking, if I have to use it.

Almost all of the SA hardwoods cost me about 30% less then a man made product.

I am not saying it is a bad product, just way overpriced in my opinion.
 
Azek and Koma are very expensive for plastic and do create a mess that's hard to get rid of.  They have their place, but those are probably the 2 top points for my dislikes of them.  I do think it'll forever be coated to the inside of your ductwork, metal or plastic, more so the plastic.  Think of it like a bad case of dandruff.  [eek]
 
May I ask where in this area you get Koma?  Universal?  We have a trim job coming up and I like Koma over Azek.  It seems to mill more like wood than Azek does.

We tried getting it a number of times and none of our suppliers carried it. Or if they did carry it, it was the wrong configuration.  Some dealers did not even know what was available.   [blink]

We even complained to the Koma rep at JLC this past March.  I hope something comes of it.  

Hey Shane...

What's the forum's policy for adding product names to the spell checker?


Ken Nagrod said:
Azek and Koma are very expensive for plastic and do create a mess that's hard to get rid of.  They have their place, but those are probably the 2 top points for my dislikes of them.  I do think it'll forever be coated to the inside of your ductwork, metal or plastic, more so the plastic.  Think of it like a bad case of dandruff.  [eek]
 
Gary,

I was getting Koma trimboards from Hamilton Building Supply 65 Klockner Rd. Hamilton, NJ (near Trenton) 609-587-4020.  I believe they're phasing them out, back to Azek.  Koma seems to be lacking in the sales and distribution skills.  They've been sitting back doing nothing while Azek pushes their way back into the lumber yards that had once moved away from them.
 
dbworkshop said:
...Brice-- if your using the domino for alignment, I am assuming you are using butt joints?  If so, how do they hold up?  We had some sections of soffit that we were mitering both the long and short edges of the sheet.  I would have gladly brought out the domino too.

Yes, I used the Dominoes for butt joints.  Mostly for frame and panel jobs.  I'll make as much frames as possible with butt joints with pocket screws.  Of course you can't do that all the time because there's a limit to the size piece you can pre-assemble and install without breaking the frame.  I'll use the Domino tenons to align the pieces where the assemblies meet.  Also we made some corner boards with Dominoed butt joints.  So far we've had pretty good luck with them holding up as long as you get a good glue joint (and that's the challenge).   
 
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