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Posted by S. Barker on June 21, 2008, 10:42 pm
WTF is 'viscreen'????
s
>I had opened up five big holes in my concrete slab in various locations to
>do drain relocation or repairs. Now I am ready to fill it back up. I got
>all the rebars and ties ready. I have already pack the sand back into the
>holes up to the bottom of the old slab, soaked the sand thoroughly with
>Termidor for termite treatment.
>
> I have also cut a thick viscreen to roughly match the hole size and laid
> it down. I am running into two issues.
>
> (1) There are a few places where the copper pipes are coming up to the
> manifold, and in that area it's too busy for a viscreen. What should I do
> there?
>
> (2) Along the seam where the new viscreen ends and the old viscreen was
> torn apart, is there a way to "seal" that off? I asked around and one
> suggestion was to use roofing tar...I am not sure of that, another
> suggestion would be to spray those expansion foam sealer (like "GREAT
> STUFF") around the old concrete edge and new viscreen, as well as all
> around the copper pipes, then pour the concrete slab. Would that work?
> Seems like an interesting idea but if that stuff expands it would be like
> concrete sitting on sponge and when the sponge goes brittle and break off
> then there is no support, it may collapse on the pipe?
>
> Any thoughts on the roofing tar or foam idea or any other?
>
> The concrete slab is 4" think and will have rebars tieing the old and new
> concrete together.
>
> Thanks,
>
> MC
>
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