Basement Walls - Part II
Continuing with our work on the basement walls, here is
Part II.
The water proofing material also acted as an adhesive for the 2" (5 cm) rigid, high density Styrofoam board. Let that sprayed material tack up for about 15 minutes and then just press the board against the wall and voilá....
...the board is stuck in place.
The exterior perimeter of the whole house was completely insulated, even across the front of the garage and under where the the overhead door openings will be as seen on the left above.
Because I'm radiant heating not only the basement floor but also the garage floor, I'm going to use all the concrete outer walls as part of the thermal mass to heat and cool the house. Heat from the floor will move into the concrete foundation walls and since those walls are now insulated, the wall will absorb and hold either heat or cool as needed. They now become part of the whole thermal mass of the structure. Without insulating the basement and garage walls, the heat or cool from the floors would migrate out of the structure, now it won't. And, since heat rises, heat from the basement thermal mass will rise into the house structure above, which will reduce the demands put on the radiant floor heat in the first and second story floors.
Because I plan on only heating the garage to the mid 50º (10 C) range in the dead of winter just to keep it from freezing out there, it will be much cooler than the main house. So the common wall between the garage and the basement was insulated on the garage side as seen above. That provides a thermal break from the cooler garage space and the main house.
Once that common wall was insulated it was back filled...
... with rock. I used rock to back fill since that will all be concrete garage floor. I didn't want any settling which could happen if I back filled with dirt resulting in potential cracks in the floor.
To assist with all the back fill duties, Keith (35+ years working for Eskers) operated this new, clever designed, Caterpillar all wheel drive multi-loader.
The bucket has a 1 ton (97 kg) capacity and the boom can be extended outward. Note the letter
"A" on the side of the boom...
...here the boom has been extended a few feet out, the letter
"B" can now be seen. Look back 4 pictures and you'll see the boom fully extended 12' (3.6 m)with the letter
"C" exposed. That extension capability is perfect for extending over stub walls as you can see here.
Remove the bucket and with a different attachment on the boom the multi-loader can be used to tote material around the work site. These are the wall forms...
...going back to the truck and on to another building site.
Another clever feature of the multi-loader is its steering abilities. It has 3 modes of steering. Conventionally just the front wheels can steer, or both the front and back can steer (note the back wheels steering above) to turn in a really tight 12' radius, or lastly the wheels can be turned more than 45º so the loader can maneuver crabbing sideways. It is also exceptionally quiet when operating making it very friendly for the crew working around it.
It cost over $85,000 dollars but it is a versatile machine that greatly aids in the crew's productivity.
Across much of the front of the house will be a concrete circle driveway so that will be back filled with rock to prevent settling and cracking the drive concrete. 2' of rock has been back filled all around the house to cover the footing drain tiles and prevent dirt from clogging them. We'll wait to back fill the long walls until the floor trusses are installed to prevent putting pressure on the concrete basement walls.
All the corners were largely...
... back filled with clay on top of the footing rock.
Elevations were shot to level up the basement sub floor to prepare it for the radiant heat tubing installation. We had a little too much rock in the basement so the excess was removed.
In 5 working days...
... we went from undisturbed, level grassy ground...
...to a water proofed...
... insulated space capable of supporting a house. Once the drains and radiant floor tubing are installed the floors will be poured.
So far the project is progressing well with no hitches.....yet.
Thanks again everyone for coming with me on another adventure. I'm curious how this one is going to turn out. Stand by, we'll all find out in the next few months.
Thomas