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Old 11-12-2018, 19:51   #1
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recaulking teak decks

i've been looking into how to recaulk my teak deck and i've seen videos and forum posts where people recommend placing tape in the bottom of the groove (after removing old caulking of course)
"Most seams are 6mm wide, you need to then apply bond breaker tape (choose 4mm for a 6mm gap as it is a sod to get in place). The bond breaker tape is to allow for movement as the Sika is designed to adhere to two surfaces only."

start at 3:56 to see the tape

the thing is, according to the sika website here
https://dnk.sika.com/dms/getdocument...ak_Decking.pdf
it doesn't say anything about taping the bottom of the slot

any thoughts? thanks
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Old 11-12-2018, 19:57   #2
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Re: recaulking teak decks

I used Teak decking systems products which did recommend bond breaker tape.

http://www.teakdecking.com/
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Old 11-12-2018, 20:05   #3
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Re: recaulking teak decks

Hi. Well that taping method does work, If viewed from above, the relative movement between adjacent boards fore and aft is the problem. If there is no tape, then you have three sides sticking, with movement, you could, and do, land up with two sides say left and bottom 'winning' over the right side and breaking its bond.

The method we use, (and if I was not so lazy I could do a youtube video)


Remove old caulking, clean, clean, and clean again.
Vacuum.
Place masking tape over the slot centered well.
With a SHARP art knife, using the sides of the slot as the ruler, slice the tape both sides, and then push it to the bottom of the slot.
Now prime (if you are going to)
Gun the slot
Tool it
Remove tape
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Old 11-12-2018, 20:18   #4
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Re: recaulking teak decks

thanks, what about if my slots are very shallow (2-3mm)? i'm worried it will not have enough side wall to hold well

also wondering why the sika doc doesn't say anything about tape?
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Old 12-12-2018, 11:55   #5
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Re: recaulking teak decks

Hi, In a very shallow one I would not tape.
I would mask with tape as above, and not do a sandpaper clean-up you don't have much teak left there....
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Old 12-12-2018, 17:01   #6
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Re: recaulking teak decks

i want to give it a light sanding because the grain lines are very pronounced, but just down to the level of the existing low points

anyhow, i'll try, see how it comes out

thanks
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Old 12-12-2018, 18:07   #7
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Re: recaulking teak decks

I had the same problem. I routed out the shallow seams with a small router and used the tape trick. The real task is getting the sides clean enough to allow the caulk to adhere. It will be evident when a small section doesn't on one side after a rain. You will see a wicked water line.
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