Expansion Joints

EricsPool

Active member
Feb 20, 2017
29
Cochran GA
Hi everyone,

Quik question, do I have to fill in my expansion joints?
I have no problem filling them in, just wondering if everyone else does. If it's one of those "yes, you really should do that" things.

second, if I should fill them in, what should I use?
I have cantilever coping around my fiberglass pool, so I do have vertical expansion joints as well as your typical ones on top of the deck.

thanks for any help.

eric
 

EricsPool

Active member
Feb 20, 2017
29
Cochran GA
Thank you, it's spring time and I've been putting a lot of effort into the pool and just coming into these little sorts of questions that I'm on unsure of, so I really appreciate the forum, and all the help, thanks!

Eric
 

Pyrodav

Gold Supporter
Bronze Supporter
Dec 11, 2016
175
Chillicothe/ohio
Are you talking about expansion or control joints? Expansion joints are made with a flexible material. Control joints are Saw cuts or tooled lines to force concrete to crack.
 

bdavis466

TFP Expert
Platinum Supporter
In The Industry
Aug 4, 2014
4,426
San Clemente, CA
Those would be control joints. A true expansion joint completely isolates the deck from another structure or object with some sort of compressible filler (usually styrofoam). These joints do typically get filled since they are usually 1/2"-3/4" wide and would be rather unsightly without a filler.
 

pooldv

Mod Squad
TFP Expert
Platinum Supporter
LifeTime Supporter
Aug 10, 2012
25,173
FL panhandle
I don't think there is an expansion joint because it is a cantilever deck.
 

EricsPool

Active member
Feb 20, 2017
29
Cochran GA
Ah, and that's why I love this forum. I didn't realize it, but I am talking about control joints, thank you for clarifying that for me.

Eric

- - - Updated - - -

If any of you have much experience with cantilever decking, could you please take a look at my other post, regarding a horizontal crack along the control joint that I'm a little concerned about.

Hairline Crack - Cantilever Coping

Eric
 

borjis

LifeTime Supporter
Aug 19, 2014
2,708
Pacific NW
Fascinating! I just realized I have cantilevered coping. It looks different than a lot of others.
Heard others discussing it but never knew what they meant. And yes it's control joints.
 

EricsPool

Active member
Feb 20, 2017
29
Cochran GA
Fascinating! I just realized I have cantilevered coping. It looks different than a lot of others.
Heard others discussing it but never knew what they meant. And yes it's control joints.

Thats great! I really like my coping, I know there is also a round coping which is bullnose and an inclined coping where it comes out past your pool at the top then comes back in toward the pool at the bottom. There may be more, mine is flat.

Eric
 

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