|
Posted by on June 18, 2008, 2:03 pm
wrote:
>
>
>
> > I am finishing up the electrical wiring phase of my project. The only thing
> > left to do wiring wise are the tankless water heater and the floor outlets,
> > and the floor outlets are driving me insane.
>
> > I have 4" thick reinforced concrete slab all over, so installing a floor
> > outlet involves cutting a trench through the slab to make room for the PVC
> > rigid conduits to go under the slab.
>
> > I have a family room that is 32'x16' with a fireplace. I have in a separate
> > wing a living room that is 27'x22'. We are not sure what we would put
> > where, but it's reasonable to expect a couch area in the living room and one
> > in the family room, but the family room may have a game table of some sort -
> > ping pong, air hockey etc...and they need an electrical outlet. Same with
> > the living room, if I put my TV, DVD etc...not against a wall, I will need
> > an outlet somewhere near the middle.
>
> > However, my wife thinks today that we need the TV here, yesterday she
> > thought it better be "there", and tomorrow probably "somewhere else", and I
> > need to wire these floor outlets but in order to do that I need to know
> > exactly what goes where.
>
> > Is there a way to plan for floor outlets without knowing how the space is to
> > be used? Once I tiled it's done and over with!
>
> > MC
>
> Cutting a trench, such fun.
> Wear a decent respirator and vented goggles.
> After cutting the concrete and removing the dirt below, spray a layer
> of canned foam insulation on the entire floor of the trench and up to
> the inside edge of the concrete - make the whole thing waterproof.
> This will prevent water wicking up through the new concrete and
> ruining whatever floor covering you will have installed.
> When cutting the trench you will violate the visqueen below and this
> will allow subsurface water to penetrate the new concrete unless you
> protect it.
> I've cut a trench for floor outlets and I've had water penetration
> though not at the same time and place.
> Its nasty stuff so deal with it before rather than later.
Yes the moisture barrier is ripped apart. I have now 5 openings of
varying sizes in different bathrooms (for drain reconfigurations), a
narrow trench in the kitchen (for passing electric to an island) and
no trench yet in the family room yet but soon.
I was wondering what I need to do to seal it off.
My plan was to put the sand back in to about 4" below top of slab,
then compact it as much as I can (by jumping up and down) then I will
spray water into the hole with a garden hose to further compact it and
take out air pockets. Then I will treat the entire opening area with
diluted Termidor (I am in Miami so need to worry about subterrainean
termites). Then I was going to lay down another layer of viscreen the
size of the hole but of course the edges will nto seal like it was
before, then for the larger holes I will put in some lateral rebars,
then pour the concrete.
Are you saying I can use a foam sealer such as this:
http://www.toolstation.com/images/library/stock/webbig/66044.jpg
or
http://www.parasiticstudios.com/gallery/greatstuff.jpg
to seal off the entire hole across the bottom and the side edges of
the concrete? I am not sure how long these foam last, don't they
break down into brittle dust after some time, I know the stuff they
foam around my sheet metal AC conduits in the attic does...I am
concerned if this could cause the concrete to shift or settle because
it would not be "bonded" to the old concrete but to the foam? May be
you meant only for small trench like 2-3" wide?
Would you do the same for large holes like 4'x5' like I have in the
bathrooms?
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap