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Cutting Out Decking For Posts Afterwards

 
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Old 05-29-2020, 02:08 PM   #1
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Cutting Out Decking For Posts Afterwards


So I've been all over the place doing this. Couple of bored holes and a jigsaw,. One big hole then a router with a flush bit. Then rabbiting it back to allow expansion and contraction.

Just wondering if anyone has a better technique there faster. I suppose two routers already set helps but it's still a few step process.
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Old 05-29-2020, 03:14 PM   #2
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Re: Cutting Out Decking For Posts Afterwards


I always do them after, unless access is a problem. Drill and jigsaw, or drill and sawzall if the rail is vinyl and sleeves will cover.

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Old 05-29-2020, 04:43 PM   #3
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Re: Cutting Out Decking For Posts Afterwards


I do them as I go and cut around them. How do you know exactly where the edge of the joist is? Is it already blocked in?

Maybe I'm not reading it correctly. You don't have the posts framed in and blocked before you deck it?

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Old 05-29-2020, 04:58 PM   #4
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Re: Cutting Out Decking For Posts Afterwards


I drop a bottom bearing or pilot bearing flush bit to follow the inside. Only that makes it tight. With composite you should Gap it.
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Old 05-29-2020, 05:25 PM   #5
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Re: Cutting Out Decking For Posts Afterwards


Quote:
Originally Posted by VinylHanger View Post
Maybe I'm not reading it correctly. You don't have the posts framed in and blocked before you deck it?
That makes two of us. Unless they're surface mount, posts go in before any decking gets laid.
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Old 05-29-2020, 05:30 PM   #6
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Re: Cutting Out Decking For Posts Afterwards


You want to if your running a track saw to trim the deck.
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Old 05-29-2020, 05:42 PM   #7
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Re: Cutting Out Decking For Posts Afterwards


Good point, but I'm too cheap to buy a track saw.

I notch my deck boards while placing them, and where a post will interfere with a trim cut, I place the end pretty dead nuts to where it should be when finished. Any small inaccuracy gets feathered out with a belt sander.

I just feel better about the posts being blocked as tightly as possible. That ain't happening if you're dropping them in after decking.
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Old 05-29-2020, 05:47 PM   #8
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Re: Cutting Out Decking For Posts Afterwards


If you can do hole layout on surface of deck, I'd probably do a plywood template to fit a round base router. If post is 3.5 x 3.5, then template hole = 3.5 + 6"? router base - bit size. If you're using a .5" bit that would be 3.5+6-.5 = 9"x 9" template hole. Then the router would wobble around in hole 3" + 1/2" router bit = 3.5" hole. Then it's a simple matter of centering template on layout. You do need to verify that the router base is centered on router shaft to be accurate. They are usually close enough for this type of work.
I like routing stair stringers this way vs using the small router base guide bushings. The shavings are less of an issue also.
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Old 05-29-2020, 07:28 PM   #9
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Re: Cutting Out Decking For Posts Afterwards


Just sittin' here wishing there was a 4x4 version of this thing for you right now:


https://www.wacoohpc.store/collectio...re-wood-chisel


Imagine the torque that it would have! But a custom drill that clamped to the bond or rim joist (whatever you call it in your parts), then drilled down with the touch of a trigger would be swell.
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Old 05-29-2020, 10:16 PM   #10
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Re: Cutting Out Decking For Posts Afterwards


I've done is after. However we decided it's much easier to get it plumb where needed when the decking isn't in the way. A 1/16" at the base is a lot in 45" at the top. Sometimes we need to manipulate the bottom portion of the post. Then there's the hardware we are putting in. Such as dttz simpson brackets.


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Old 05-29-2020, 10:19 PM   #11
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Re: Cutting Out Decking For Posts Afterwards


Quote:
Originally Posted by Tom M View Post
You want to if your running a track saw to trim the deck.

I still use a track saw in between the posts. I get it close and finish with other saws.


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Old 05-29-2020, 10:31 PM   #12
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Re: Cutting Out Decking For Posts Afterwards


I just toe screw the posts to the decking.

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Old 05-30-2020, 02:52 AM   #13
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Re: Cutting Out Decking For Posts Afterwards


You could always just put it in your contract that customers aren't allowed to fall off.

Then no posts needed.

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Old 05-30-2020, 02:53 AM   #14
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Re: Cutting Out Decking For Posts Afterwards


Quote:
Originally Posted by Calidecks View Post
I've done is after. However we decided it's much easier to get it plumb where needed when the decking isn't in the way. A 1/16" at the base is a lot in 45" at the top. Sometimes we need to manipulate the bottom portion of the post. Then there's the hardware we are putting in. Such as dttz simpson brackets.


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That was my thought. There would be a lot of ladder work if you do it all after. Whenever I do post through the framimg, there is a ton of framing and blocking.

That would be a pain from underneath. Especially after the fact.

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Old 05-30-2020, 06:50 AM   #15
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Re: Cutting Out Decking For Posts Afterwards


I do the posts before once in a while depending on access later. Like everyone said better for post installation worse for trimming. Running the track saw in between posts sucks. Its not as clean anyway you do it.

I tack a cleat sometimes and precut the board on one side to butt up to it but with composites, depending on the sun will move around.

Really nothing better than cutting with a straight shot.
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Old 05-30-2020, 10:05 AM   #16
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Re: Cutting Out Decking For Posts Afterwards


Never tried to do it afterward, IMO leveling the post would be much harder after the fact and if working by yourself you have to hold the post, reach and nail underneath, etc, it seems it would be more of a pain in the A$$.
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Old 05-30-2020, 10:25 AM   #17
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Re: Cutting Out Decking For Posts Afterwards


And how would you do a ground level deck. Especially if you had any hardware or lags to do.

Then you probably have to it after.

It is easier to tracksaw a flat deck, but the posts are only in the way for some of it.

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Old 05-30-2020, 10:34 AM   #18
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Re: Cutting Out Decking For Posts Afterwards


Quote:
Originally Posted by VinylHanger View Post
And how would you do a ground level deck. Especially if you had any hardware or lags to do.

Then you probably have to it after.

It is easier to tracksaw a flat deck, but the posts are only in the way for some of it.

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Ground level decks are usually 2x6 for a single step so not only do you not need railings but the framing provides bad leverage.

In the case the owner wants them, I'm a big fan of the surface mount steel. Very rigid.

In fact I wrestle with always using them. Cost wise it's more but not much
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Old 05-30-2020, 10:44 AM   #19
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Re: Cutting Out Decking For Posts Afterwards


Nah. Plenty of decks that start very tight to the ground along the house, then end up a couple feet above grade by the time they get fifteen feet out. Easy enough to do the last posts after decking, but impossible to do them up close to the house only an inch or two above grade.
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Old 05-30-2020, 11:54 AM   #20
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Re: Cutting Out Decking For Posts Afterwards


As I was having lunch and gave more thought to it, it is 100 times easier and faster to do it before the decking...
That said, regardless of which way one does that, everyone is the boss so do it your way, nobody will take that away from you.

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