Thermal breaks between rooms - radiant floors

[Radix2]

As is not too uncommon here, I will have part of my building set up as a garage, and part set up as a workshop - with a wall between them.

I am going to have separate zones for both sides.

The building is stick built with a full 42" deep foundation, insulation ect.

between the two sides there is a thickened slab area under the wall, but not a full deep foundation.

Does anyone have any recommendations on how to best create a thermal break in the floor between the two sides?

The plan at the moment is to use a vertical foamboard to separate the two side of the thickened slab area, and pin the sides together with 24" rebar. Any better ideas ? Better way to form it ? issues ?

 

[jonjon1]

thats all you need...

 

[Rookie2]

Is the floor floating ? NO Pinning !

 

[Radix2]

Is the floor floating ? NO Pinning !

The floor is currently planned to be pinned to the foundation walls on the exterior sides. Without the thermal break, the floor was going to be continuous with a thickened area under the separating wall.

Any further thoughts on this approach ? are there pro and cons on floating the slab completely ?

 

[SSpanky]

I wouldn't pin the slabs together if your having different heat zones between the two.
Simple foam board is all you need for thermal break.

 

[Dick in Wisconsin]

Assuming you are not going to heat the garage.

Are you going to insulate under the garage floor and the garage foundation?

Why are you going to pin the floor to the walls?

 

[Radix2]

Assuming you are not going to heat the garage.

Are you going to insulate under the garage floor and the garage foundation?

Why are you going to pin the floor to the walls?

Both rooms will have radiant floor -pex/insulation/etc.

Architect has the pinning on the plans - I assume to make sure that the floor never moves vs. the walls (not that they should with proper compaction...) - the perimeter has the foam boards with 45 deg edge detail.

What is best practice for slab floors inside deep/frost wall foundations?

Most likely the foundation will be a poured footer with block walls up to grade.

 

[jonjon1]

Is there a reason he wants to pin it? was it soft digging? IS their ledge or something else we don't know about? For a slab on grade I would't pin the footing walls in, you may be prone to cracking floors...

Easy enough, raise your hand and ask the builder what he thinks...

BUT, as for t-break, just foam board, will get ya done, done it a couple hundred times...