Exterior door on slab

[pete_schweaty]

I will be framing my garage in the coming week and have a question about setting the man door. As you can see with the attached picture the sill extends outwards by about 1-1/4 inches. The door will sit directly on the slab so there is nowhere for this to go if I set the front of the door frame flush with the exterior framing. Is the point of this extension to sit under the wall sheathing and siding, or am I missing something. There will be nothing underneath of this 1-1/4 area of sill once it is finished. Am I missing something? The door should be set flush with the stud framing correct? Or should the door be inset so that the lip of the sill is flush with the slab? Thanks!

 

[Old tool guy]

That’s a drip edge so rain running down the face of the door is diverted away from the threshold. If you don’t mind a little water coming in, just saw it off.

 

[Zeke]

Use a piece of Trex or other brand. Don't even use PT wood.

 

[pete_schweaty]

That’s a drip edge so rain running down the face of the door is diverted away from the threshold. If you don’t mind a little water coming in, just saw it off.

Thanks. If I leave it on, it will just overhang into thin air. Wont that eventually bend?

 

[pete_schweaty]

Use a piece of Trex or other brand. Don't even use PT wood.

Thats just a piece of wood from transport. It is coming off before installation.

 

[manwithtools]

What @Zeke is saying is to use a piece of PVC or Trex like material to provide a support under the threshold after installation. And yes they are made that way by design. The doors jamb would typically be set flush with the wall framing, not inset.

 

[pete_schweaty]

What @Zeke is saying is to use a piece of PVC or Trex like material to provide a support under the threshold after installation. And yes they are made that way by design. The doors jamb would typically be set flush with the wall framing, not inset.

Got it. So just put it under the sill extension, attached to the slab face below?

 

[manwithtools]

That's what I would do. be sure to leave the support piece narrow enough the drip edge can still shed water properly.

 

[Zeke]

Thanks. If I leave it on, it will just overhang into thin air. Wont that eventually bend?

Thats just a piece of wood from transport. It is coming off before installation.

These 2 statements leave me confused. I made a living installing doors. My take is hire someone.

 

[RivennHewn]

Remove threshold, trim jamb to fit slab, reinstall threshold(making sure it still slopes to the exterior) bed in Sikaflex, and complete install.

Outside of jamb location depends on you siding/casing detail, but usually flush with sheathing.

Don’t forget to install Grace, or whatever’s wrap you’re using

 

[nmk_61802]

My concrete guy actually formed out my door opening an 1 1/2" extra. In this instance, I would pack the underside of the sill with non-shrink grout after installing the door.