pouring concrete landing at wood floor sys height

[Mac Moonfire]

Hi,
A square concrete landing is proposed to be poured at the height of the floor system against the house on 2 sides. the landing will have a good slope away from the building and is covered by a roof of the same size.
The joist rims are fully blue-skinned (waterproofed). The builder proposed to pour against the blue-skin.
Leaving a gap between blueskin and concrete was discussed but the method not settled on.
I'm uneasy about this one. On the one hand, the framing seems protected, but the transition or lack thereof is causing me to wake up at night.

Experience and feedback would be appreciated.
Thank you !

 

[Inspector Gift]

Mac, your post is not clear on what is "a good slope" of your landing.

Maximum slope for landings is 2 percent. (IBC 1010.1.4 & IRC R311.3)

 

[Mac Moonfire]

Mac, your post is not clear on what is "a good slope" of your landing.

Maximum slope for landings is 2 percent. (IBC 1010.1.4 & IRC R311.3)

Apologies, the builder proposed a 0.25" per foot (2.08%) slope.
thank you

 

[Joe.B]

Metal flashing, see it all the time. I've never watched this video before, but a quick google search for "metal flashing for concrete poured against wood framing" turned this up, pretty well describes what I've seen, at least the first half. Not so sure I agree with the second half, I might have to watch it again.

 

[Inspector Gift]

IBC 1404.4 specifically SELF_ADHERED FLASHINGS to comply with AAMA 711, and FLUID APPLIED MEMBRANES used as flashing are to comply with AAMA 714. (See attached.)

I am not familiar with the product. Ask your building official if they will accept it as an alternative flashing material.

 

[ICE]

to be poured at the height of the floor system

To each his own, but I wouldn’t do that.

is covered by a roof of the same size

That provides little if any shielding from the elements. Birds maybe…

 

[Mr. Inspector]

2018 IRC R317
Wood siding, sheathing and wall framing on the exterior
of a building having a clearance of less than 6
inches (152 mm) from the ground or less than 2 inches
(51 mm) measured vertically from concrete steps,
porch slabs, patio slabs and similar horizontal surfaces
exposed to the weather.

 

[Mac Moonfire]

2018 IRC R317
Wood siding, sheathing and wall framing on the exterior
of a building having a clearance of less than 6
inches (152 mm) from the ground or less than 2 inches
(51 mm) measured vertically from concrete steps,
porch slabs, patio slabs and similar horizontal surfaces
exposed to the weather.

we have 8" to grade and 2" to hard surfaces in our provincial code.

The homeowner has opted for blueskin and metal flashing to which the concrete has been poured to. That's it for this one.