Garage Floor Heat Questions.

[Coach529]

Just finishing up my 24' x 42' garage and crank on my floor heat.

I have some questions. Below is a picture of the slab.

To the right (other side of trailer) there is a 3' cement wall dropping down to a small concrete slab. Backside of the slab is a 3' wall. To the left is cement patio. Under the garage slab is 1" foam.

What would be the best way to insulate the two walls? I do not have any room to bring in any equipment, so if I dig down it will be with a shovel and man power.

Attached is a picture of my set up.

 

[rburke65]

Ya gotta do what ya gotta do! I hand dug, inside and outside perimeter of a 32' x56' maybe 12" to 18" down for the styrofoam. Lots of digging. Glad I did it.....glad it's done.

 

[Coach529]

How thick of insulation did you install?

 

[anthony666]

you got all the ingredients on your near boiler, but you kinda shuffled the order some .. the big thing i'd change is the gauge .. it's a air trap sitting there vertically like a kid's sucker, and will rust out a give you problems down the line .. if you want a gauge, which you definitely should have without make up water, make it one that has the probe sticking out of the back almost like a thumbtack, or a meat thermometer i guess would be a better picture of it .. tee that into a vertical pipe so no air can be trapped and watch for low pressure

 

[Coach529]

you got all the ingredients on your near boiler, but you kinda shuffled the order some .. the big thing i'd change is the gauge .. it's a air trap sitting there vertically like a kid's sucker, and will rust out a give you problems down the line .. if you want a gauge, which you definitely should have without make up water, make it one that has the probe sticking out of the back almost like a thumbtack, or a meat thermometer i guess would be a better picture of it .. tee that into a vertical pipe so no air can be trapped and watch for low pressure

What if I just spun that T so it points down? Would that work?

Thanks for your input BTW.

 

[anthony666]

What if I just spun that T so it points down? Would that work?

Thanks for your input BTW.

yea .. but it might be a ***** to read .. you're welcome, great looking shop

 

[Coach529]

yea .. but it might be a ***** to read .. you're welcome, great looking shop

It has a needle and numbers.....I think I can manage!!

 

[Coach529]

Any more input?

I was thinking about firring the exposed walls out with treated 2" x 4" ripped down to 2". Space them 16" OC and cut 2" blue board to lay between them. Finish would likely be some tin.

 

[luke7734]

i see you added quite a bit of concrete after the garage.. looking at the first picture, did you only make 2 cuts in your floor???

 

[luke7734]

Also.. what did you end up doing for insulation in the walls / roof.. and what size tankless did you run?

 

[Coach529]

i see you added quite a bit of concrete after the garage.. looking at the first picture, did you only make 2 cuts in your floor???

The concrete was poured at two separate times. The stuff the trailer is sitting on is 18' x 24' and was poured in 2011. The other slab is 24' x 24'. Both slabs have expansion cuts on their center lines.

 

[Coach529]

Also.. what did you end up doing for insulation in the walls / roof.. and what size tankless did you run?

R19 in the walls.

Ceiling has R25.

10kw electric boiler.

 

[Coach529]

Should I use 2" Foam on the exterior of the slab?

 

[GYPSY400]

Should I use 2" Foam on the exterior of the slab?

I did.. my slab has no cement showing from the outside.. Its all covered in 2" and then back filled.


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