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Old 02-07-2013, 01:53 PM   #1
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leak between sun deck addition and house


I am in the process of redoing our sundeck and wanted to eliminate a water infiltration problem. Along the area where the addition meets the house is a gap/open seam that extends the full depth of the metal pan concrete deck.

My plan of action was to remove all the loose concrete and debris then apply an expanding spray foam. Then I was going to apply waterproof concrete over the entire surface and finish it off with a product called Siliconizer here in Costa Rica. Here is the link to the product http://www.lancopaints.com/english/p...f_coating.html

Am I going about this the right way or should I take a different route?
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Old 02-07-2013, 04:57 PM   #2
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leak between sun deck addition and house


Nope, spray foam is not water proof and anything hard used to cover it will just crack.
The wall does not move, that slab does.
Clean it out and fill the gap with foam backer rod, then use something like this to fill the gap.

http://www.dap.com/product_details.a...=26&SubcatID=6
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Old 02-07-2013, 07:26 PM   #3
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leak between sun deck addition and house


Thanks for the tip on filling the gap. Is my approach to finishing off the entire surface sound?


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Originally Posted by joecaption View Post
Nope, spray foam is not water proof and anything hard used to cover it will just crack.
The wall does not move, that slab does.
Clean it out and fill the gap with foam backer rod, then use something like this to fill the gap.

http://www.dap.com/product_details.a...=26&SubcatID=6
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Old 02-07-2013, 07:29 PM   #4
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leak between sun deck addition and house


No, what you suggested will just crack, what ever goes there needs to be flexable.
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Old 02-07-2013, 08:13 PM   #5
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leak between sun deck addition and house


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Originally Posted by joecaption View Post
No, what you suggested will just crack, what ever goes there needs to be flexable.
Not the joint area but the entire sun deck surface. There used to be tile. I ripped it all up and want to apply a decorative water based concrete layer, about 3-4mm thick.
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Old 02-07-2013, 08:43 PM   #6
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leak between sun deck addition and house


There's at least 2 concrete guys on here from time to time I'll let them suggest something.
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