Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 15 of 15

Thread: Coping to pool deck joint

  1. Back To Top    #1

    Join Date
    Sep 2007
    Location
    Lafayette, Louisiana
    Posts
    344

    Coping to pool deck joint

    What do the concrete guys pack around the back of the coping and in between a poured concrete deck to leave room for caulking later? It appears to leave about a 3/8"-1/2" gap that is cleared afterwards and then caulked.

    Anybody know what it is called or where I can get some?

    Thanks...
    Fortune favors the well prepared

    The build...
    viewtopic.php?t=3974
    Freeform 24' x 38' IG gunite. 3 1/2' to 8' deep. 28,500 gallons. AutoPilot Total Control SWCG. Pentair Intelliflo VF. Pentair CCP520 cartridge filter. Colorlogic LED lights. Tahoe Blue Diamond Brite. 1200 sq ft stamped concrete deck.
    More details as they happen...

  2. Back To Top    #2
    SeanB's Avatar
    Join Date
    Mar 2007
    Location
    Missouri City (suburb of Houston, TX)
    Posts
    2,622
    It's called "mastic." Here is some info:
    http://poolmastic.com/whatis.htm

    Most good builders will include mastic as part of the build.
    TFP Founder

    My Pool: 13K gal IG gunite with 7' spa, Pentair Cartridge Filter, Intellichlor IC40 SWG, Polaris 280 Cleaner, TF-100 Test Kit w/ salt test.

  3. Back To Top    #3

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077
    Belldiver, are you talking about the caulk that goes in the crack or the material underneath the caulk?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  4. Back To Top    #4

    Join Date
    Sep 2007
    Location
    Lafayette, Louisiana
    Posts
    344
    Quote Originally Posted by duraleigh
    Belldiver, are you talking about the caulk that goes in the crack or the material underneath the caulk?
    Well kinda both. I need to find the stuff they wrap around the back of the coping to leave the gap and what fills that gap later on. I'm self contracting this build, so I'm having to make sure some of this detail stuff happens myself.

    Thanks...

    Jim
    Fortune favors the well prepared

    The build...
    viewtopic.php?t=3974
    Freeform 24' x 38' IG gunite. 3 1/2' to 8' deep. 28,500 gallons. AutoPilot Total Control SWCG. Pentair Intelliflo VF. Pentair CCP520 cartridge filter. Colorlogic LED lights. Tahoe Blue Diamond Brite. 1200 sq ft stamped concrete deck.
    More details as they happen...

  5. Back To Top    #5

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077
    Well, I have seen a product that I believe would work well. It's a 3" or 4" roll of 1/2 inch thick polyfoam....available at concrete materials companies. The polyfoam goes up against the bond beam (coping) and the decking is poured right up to it....at this point, it functions like a normal expansion joint.

    Then, when the deck is cured, the top 1/2 inch of the polyfoam is lifted out (it's perfed 1/2" from the top) and it leaves a 1/2" by 1/2" trough to put the sealer in. I have not seen it used much in pool construction but I see no reason why it wouldn't work.

    Polyurethane caulk, while a real PITA to work with, makes a beautiful seal and remains flexible for years and years....I wouldn't use anything else. The brand I've used is "Vulkem 911" for about 4-5 bucks a tube...it really makes a far better joint than silicone or acrylic.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  6. Back To Top    #6

    Join Date
    Sep 2007
    Location
    Lafayette, Louisiana
    Posts
    344
    That polyfoam sounds like what I need. Any idea where to get it? I'm not sure what a concrete materials company is???

    I've located a couple different types of caulking used for this joint and another item called "backing rod" for backfilling the joint. I just didn't know what exactly to back up the coping with for the concrete deck pour.
    Fortune favors the well prepared

    The build...
    viewtopic.php?t=3974
    Freeform 24' x 38' IG gunite. 3 1/2' to 8' deep. 28,500 gallons. AutoPilot Total Control SWCG. Pentair Intelliflo VF. Pentair CCP520 cartridge filter. Colorlogic LED lights. Tahoe Blue Diamond Brite. 1200 sq ft stamped concrete deck.
    More details as they happen...

  7. Back To Top    #7

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077
    look in the yellow pages for concrete supplies. If you use this perfed polyfoam, you don't need backer rod....backer rod is if you don't have anything to fill the gap.

    I just didn't know what exactly to back up the coping with for the concrete deck pour.
    I'm not sure what you mean. I'm saying this polyfoam expansion joint material will serve that purpose.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  8. Back To Top    #8
    midtngal's Avatar
    Join Date
    Oct 2007
    Location
    Nashville, TN
    Posts
    485
    Belldiver,
    Home Depot has this polyfoam stuff you're looking for. It's back in the concrete section. They actually call it expansion joint, but it looks to work just like what you're talking about and Duraleigh describes.

    Not to highjack, but you're kind of making me nervous now..... My PB didn't put any type of expansion joint or caulking in between the brick coping and the decking....



    Can you or someone chime in here and tell me if I'm in trouble down the road??? At this point, nothing would not surprise me.

    Karen
    10,700 gal IG vinyl
    Pentair Triton II TR50 sand filter
    Hayward SharkVac XL cleaner; Emerson 1HP pump
    Bioguard Mineral Springs SWG
    2 skimmers

  9. Back To Top    #9

    Join Date
    Sep 2007
    Location
    Lafayette, Louisiana
    Posts
    344
    I'm certainly no expert on pools (yet), but have worked around construction of various types most of my life. I travelled around town and looked real close at a bunch of pools. I saw pools done both ways, with and without the joint. I only saw problems with one of the pools that did not have the expansion joint, but I don't think it was due to that, I think the decking was too thin where it overlapped the back of the exposed bond beam and it cracked about 2 inches from the coping all the way around the pool. I don't think the lack of expansion joint was the cause of that though.

    Where I do think it would make a difference is if your pool deck is going to be exposed to movement, like up north with frost heave or where you might have a fair amount of settling under your deck due to compaction of the soil. You might end up with the decking pushing on the coping (frost heaves) or pulling away (compaction).

    ...and Duraleigh, I'll check out the polyfoam, I think that's what I need. Thanks...

    Jim
    Fortune favors the well prepared

    The build...
    viewtopic.php?t=3974
    Freeform 24' x 38' IG gunite. 3 1/2' to 8' deep. 28,500 gallons. AutoPilot Total Control SWCG. Pentair Intelliflo VF. Pentair CCP520 cartridge filter. Colorlogic LED lights. Tahoe Blue Diamond Brite. 1200 sq ft stamped concrete deck.
    More details as they happen...

  10. Back To Top    #10

    Join Date
    May 2007
    Location
    Carrollton, TX
    Posts
    126
    Quote Originally Posted by duraleigh
    Well, I have seen a product that I believe would work well. It's a 3" or 4" roll of 1/2 inch thick polyfoam....available at concrete materials companies. The polyfoam goes up against the bond beam (coping) and the decking is poured right up to it....at this point, it functions like a normal expansion joint.

    Then, when the deck is cured, the top 1/2 inch of the polyfoam is lifted out (it's perfed 1/2" from the top) and it leaves a 1/2" by 1/2" trough to put the sealer in. I have not seen it used much in pool construction but I see no reason why it wouldn't work.
    That's exactly what they did on my pool. They poured the mastic in the gap after removing the polyfoam and sprinkled a fine sand on top for a nice finish-out.
    7000 gallon IG freeform w/ 6 ft. spa, 21 ft weeping wall, Hayward SP4020NS Northstar pump, Colorlogic LED’s, DE6020 filter and H400IDL2 400,000btu heater. Aqua logic 8 zone controller with Aqua Rite salt chlorine generator, Stonescapes pebble finish – Aqua Blue and flagstone coping, stamped/stained concrete deck

  11. Back To Top    #11

    Join Date
    Mar 2008
    Location
    Frisco, TX
    Posts
    24
    You can see the stuff they used on our pool around the hot tub on this photo:

    http://www.flickr.com/photos/23648436@N04/2322008208/

    They are pouring the decking today so I'll take some more photos tonight showing the joint with the coping.

  12. Back To Top    #12

    Join Date
    Feb 2008
    Location
    Ohio
    Posts
    156

    caulk

    duraleigh,
    we also have to caulk around the pool...can you tell me whether the Vulkem 911 is better to use or the Vulkem 45 SSL. When I did a search on pool caulk the 45 SSL came up. Also where can this be purchased, do the big box/wholesale chains have it? and if we also need the foam backer rod where can this be found?

    thanks,
    Chris

    40yr old IG 20 x 40 gunite
    30-40yr old prehistoric IG gunite 20 X 40 approx 30000gals
    now with new cool blue Diamond Brite and blue waterline tile (looking good for 40yr old pool)
    new Hayward 244T sand filter, 3/4 Hayward pump, Jandy heat pump
    pool skim (love it)

  13. Back To Top    #13

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077
    Chris,

    I found a concrete supply store here in Raleigh and they carried the backer Rod as well as the caulk. It was the only caulk they carried so I'm not sure if the other is suitable for your purposes.

    Home Depot has backer rod in many stores and, as long as the caulk is polyurethane, it will probably do fine....this stuff just worked exceptionally well (although you must be careful with it or you'll make a mess).
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  14. Back To Top    #14

    Join Date
    Jan 2008
    Location
    Forney, TX
    Posts
    162
    Quote Originally Posted by txborn
    Quote Originally Posted by duraleigh
    Well, I have seen a product that I believe would work well. It's a 3" or 4" roll of 1/2 inch thick polyfoam....available at concrete materials companies. The polyfoam goes up against the bond beam (coping) and the decking is poured right up to it....at this point, it functions like a normal expansion joint.

    Then, when the deck is cured, the top 1/2 inch of the polyfoam is lifted out (it's perfed 1/2" from the top) and it leaves a 1/2" by 1/2" trough to put the sealer in. I have not seen it used much in pool construction but I see no reason why it wouldn't work.
    That's exactly what they did on my pool. They poured the mastic in the gap after removing the polyfoam and sprinkled a fine sand on top for a nice finish-out.
    Ditto here. Did Hobert do your pool? They did ours and I see we're both in DFW. They also installed that same joint detail between the existing patio/ sidewalk and the new decking.

    As a sidebar, I don't know why they call the joint filler material "mastic" in the pool industry. In the construction industry mastic is an adhesive used for things like glueing mirror to walls. Expansion joint filler is called "sealant".
    Our pool adventure... click here

  15. Back To Top    #15

    Join Date
    Jul 2015
    Location
    ARLINGTON
    Posts
    7

    Re: Coping to pool deck joint

    Digging out old caulk and found the carpet cutting tool with hooked blade worked better a box cutter, but still hard work. Someone recommended an electric multitool cutter. Several type blades, but the semi-circle with diamond dust works great. Now comes time to refill. Sand has been recommended the caulk. Most say self-leveling works the best, but what happens to the section the the deck has risen over an inch above pool? I heard of a powder but not had any feed back. Any suggestions?

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •