Pedestrian traffic coating upturn on brick wall

[Alan CA]

Hi everyone,

What is your opinion on making a pedestrian traffic coating upturn (elastomeric waterproofing) on a solid masonry brick wall?
The wall is an exterior wall of a building (occupied). I know that solid masonry walls have no weep holes, but my concern is the bond between the elastomeric and the bricks. Brick walls move, expand and crack. Coating on bricks won't last that much but still I see it everywhere.
How about hot rubberized asphalt upturn with these walls? Would it perform any better?
Your opinions are highly appreciated.

 

[IRstuff]

Isn't there an issue with asphalt that requires protecting it from the sun, etc.?

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[Canuck65]

Hot rubberized asphalt typically would need to be covered with a flashing to protect it from UV exposure. It should bond to the brick. With hot rubber you can also specify elastomeric joint reinforcement and mechanically fasten it at the top of the upturn.

Assuming you are referring to clay brick (as opposed to concrete brick ... but perhaps you mean concrete block), I don't think an elastomeric thin type waterproofing would last that long on clay. I would solicit an opinion from the technical sales rep for the product(s) you are contemplating. In the past I have done things like build a concrete curb in front of the brick wall and waterproof the curb, caulking the joint between the curb and the masonry. If it was concrete block, you may be able to parge the face and then waterproof. If clay brick, a small height of cement board fastened to the brick, then waterproofed and caulked. In my area, clay bricks at grade that can get wet are a bad idea due to the freeze thaw. In some cases we have taken the lower three or four courses of (very deteriorated) clay brick out and replaced it with concrete brick.

Double check that you will not be trapping moisture in behind the upturn.

 

[Alan CA]

Thank you Canuck65 for your input. Your concerns are exactly what I was talking about in my topic. The clay bricks that I jave won't be good substrate to the proposed elastomeric. Therefore, I don't think I should go with the request of applying elastomeric over the clay bricks. To be honest, I'm not going to consider replacing clay bricks with CMU. However, applying hot rubberized asphalt waterproofing on the bottom rows of the bricks.

IRstuff, sure. It's seneitive to UV and must be protected along the upturn.

 

[IRstuff]

Have you considered something like this:

https://www.youtube.com/watch?v=qIw2hmuj6To

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[Alan CA]

IRstuff, I'll take a look at it. Thank you very much

 

[epoxybot]

In my experience, not as a specifier but as a project manager, the solution specified was Un-cured Neoprene, which is adhered to both the slab and the brick wall with high tack rubber cement. The polyurethane traffic coating is then applied over the uncured neoprene for weathering and a Fry Reglet caps the transition between the coated neoprene and the brick, with a bead of caulk to the top of the reglet.