How to Build a Foundation from Start to Finish

Alright, so the overall scope of this addition
here is to remove the glass sunroom. This is going to become an extension of the
dining room which is on the right side and the kitchen which is on left side.
The other part of the construction that you are seeing behind me is going to become the
master bedroom and bath area. So right now what we’re doing here is digging
the foundation for the project here in Rocky Hill Connecticut.
It’s a crawl space foundation, so the first thing that we’re doing is just digging down
about 42″, just deep enough for the footers to be below the frost line.
Once we get this all dug out, we’ll get back to the next phase of the project pouring the
footers and the walls. So right now we’re standing in the kitchen,
and what we’re going to do here, is that we’re going to remove the entire wall.
From that point in the corner, all the way down to the dining room, which is this way.
Alright so as you can see we’re in the dining room now, and this is the other part of the
wall that we’re going to take out, right up to this corner here.
Now one of the biggest problems with this here, I should say obstacles that we’re going
to have to overcome is that we are going to have to header off this entire ceiling which
has a span of about 20 feet. Now once we actually take this apart and we
get up into the ceiling and see how its constructed , we will have a better idea of the types
of materials we can use. The overall goal here is going to be to eliminate
any columns, butting through the center of the opening.
So right now we’re standing in one of the bedrooms, which is currently being used as
an office, but when this project is complete, this office is going to become the new master
bathroom. The activity that you see behind me again
is the excavation, and after this wall is where we’re going to blow out the new addition
which will be the master suite. Now what we’re going to do here is basically
is we’re going to keep this part of the wall which is going to be used for the new bathroom,
and right about this area here we’re going to create a walkway for the hallway into the
new addition. So what you’re looking at here is the excavated
area where our new addition is going to go. Now these forms all around the perimeter here,
are where the footers are going to be poured. Now if you see here, on this addition which
was poured about 10 years ago or so, is very similar to what we’re going to be doing today.
The first step of pouring is going to be just the footers in here and its similar to this. Now once these footers are completely dried
and cured, the forms are going to come off and the next step is going to be to pour the
foundation walls, which is something like this and that’s going to sit on top of the
footers and it’s also going to follow the perimeter.
Now once all the perimeter footers get poured the next footers that we’re going tom pour
are these center footers in the middle of the addition.
These are going to support some lally columns that are going to hold the main carrying beam
form this end all the way to the house. Now on top of this main carrying beam, we’re
going to rest our floor joists that are running across at a 20 foot span.
Next thing to know here is the dept of the footers. In the northeast the code states
that you have to be at least 42 inches deep below grade. Grade means basically where the
grass is, the reason for that is so the frost doesn’t go any deeper than 42 inches, and
it’s not going to push the addition up during the season when the ground freezes.
The concrete truck is here and in the next couple minutes we’re going to be pouring the
footers. Alright, so now we’re starting to pour the
concrete for the footers. The concrete that we are using is a 3000 PSI high strength concrete
mix. The reason we’re using such a high strength
mix, is because the weight of the whole addition relies on the footers.
Alright so today is a busy day here on Simply Additions at the project site. What we are
doing is the first step here, see Tony in the corner over there, he’s drilling a hole
just inside that foundation. What he’s going to be doing is ramming rebar
in there and they’re going to be pins, because the new foundation wall has to have some sort
of a mechanical connection to the existing foundation and the new foundation using a
pin. Looking at the basement window right now,
you can see the marking and that’s where we are going to be putting a cut, the reason
for the cut is so that we can have a walk-thru from the old basement to the new foundation.
The new foundation is only going to be a three foot crawl space. And we need to cut and opening
so that we can have access to run all the utilities into the new basement.
So we have a form set on top of the concrete footers, and they’re about ready to start
pouring the concrete. If you notice everything is squared and we
got some strings here to make sure everything is squared, level and plumb.
As you can tell down here as we were talking about before, these are the pins that are
anchored into the existing foundation, that are going to give a good mechanical fastening
to the new concrete wall. This red line right here represents the height
of our foundation wall. Something that Tony is going to use as a guide for himself throughout
the rest of this pouring. Alright so we’re here today and we poured
our concrete walls and we already stripped the forms. So now we got a nice fresh concrete
wall and what we have here are the anchor bolts
These are going to be used to fasten the top plates and essentially what it’s going to
do is keep the entire structure from blowing away. It’s going to give a good mechanical
fastening from the walls to the concrete. So now I’m standing inside the crawl space
foundation and today we are going to be pouring the floors.
So now I’m standing inside the crawl space foundation and today we are going to be pouring
the floors. Right now what Tony is doing over here he’s using a laser level so he could
make sure that when he pours the floor its going to be nice and level.
He’s using these red chalk lines as a guide when he’s pouring to make sure the floor is
consistently level all around walls.

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