Drip Edge solution?

[VietGnome]

Due to insulation from slab, and variance in the slab I'm going to need to come out 2" in some places, and 4" in others. Is my best bet to just size for the largest and run a 4" wide Z-trim the whole way around the building?

If thats the case should I have the bottom trim angle back towards the building so it can seal against any variance?

Or should I be custom fitting?

 

[mm08822]

Not sure how much is bowed out to 4" but if minimal, consider varying the foam panel thickness. Or plan it all for 4" and add more foam at the 2" locations. (You would be varying the innermost thicknesses to ensure the visible final foam board is looking uniform.)

What will cover the exposed foamboard?

 

[VietGnome]

Not sure how much is bowed out to 4" but if minimal, consider varying the foam panel thickness. Or plan it all for 4" and add more foam at the 2" locations. (You would be varying the innermost thicknesses to ensure the visible final foam board is looking uniform.)

What will cover the exposed foamboard?

The exposed foam will be covered in cement board and either sealed and painted or parged/stucco.

Not quite sure get what you mean by trim the foam? You mean thin an entire sheet?

I can post photos in the day light but its varying from 2-4" over a 25ft span

Other sections and walls have a maybe 0.5-1" variance.

 

[mm08822]

The exposed foam will be covered in cement board and either sealed and painted or parged/stucco.

Not quite sure get what you mean by trim the foam? You mean thin an entire sheet?

I can post photos in the day light but its varying from 2-4" over a 25ft span

Other sections and walls have a maybe 0.5-1" variance.

Not trimming the thickness. Buy 1/2, 3/4, 1" and build up the gap to get the 4" or whatever overall "thickness" works for the variation.

Let's say you want/need 2" of foam all the way around. Where the wall is not bowed, add 4" foam. Where the wall is bowed out 2", you only add 2" foam.
Assuming the wall was placed straight (not following the bow), attach 4" z channel to the sheathing. As you then look down the covered foundation wall, it now looks straight(no bow detected).

Are all 4 sides bowed?

 

[VietGnome]

Not trimming the thickness. Buy 1/2, 3/4, 1" and build up the gap to get the 4" or whatever overall "thickness" works for the variation.

Let's say you want/need 2" of foam all the way around. Where the wall is not bowed, add 4" foam. Where the wall is bowed out 2", you only add 2" foam.
Assuming the wall was placed straight (not following the bow), attach 4" z channel to the sheathing. As you then look down the covered foundation wall, it now looks straight(no bow detected).

Are all 4 sides bowed?

I see what you're saying.
Really 3 have bows, but only 2 are really noticeable.

Walls are straight. Is it fine if the Z doesn't fit snug to the insulation?

 

[mm08822]

I see what you're saying.
Really 3 have bows, but only 2 are really noticeable.

Walls are straight. Is it fine if the Z doesn't fit snug to the insulation?

Maybe overbend 10 degrees and see how that works along the entire length of the wall.

What's your dog's breed?

 

[Prospecter]

Mice will be determined to get to the foam. Overbend the Z to get a good seal.

 

[Fav Onefour]

I see what you're saying.
Really 3 have bows, but only 2 are really noticeable.

Walls are straight. Is it fine if the Z doesn't fit snug to the insulation?

What is causing the bow?
If it's just a small area you could trim the backside on your foam panel so it's tight. You will have the best luck of success over time with foam tight to the foundation. It would look better too. I think is looks sloppy if the foam wanders in thickness.

 

[tarmy]

Maybe for the whole wall out an add thinner foam insulation up there too. That way the exterior looks clean, drains well and solves both problems. I just went thru this same issue last year