Seeking insulation advise

[branimal]

I'm insulating interior walls for a renovation project in NYC. The building is 3-story with steam radiator heat. The building is attached to adjacent buildings on both sides, so only the front and back walls are being insulated. There is minimal framing up on the front and back walls currently, so installation should be straightforward. The insulation is being installed on the 2nd floor.

Front and back wall measure about 20' wide by 10' tall. Back out the windows and I'm at ~290 sq ft.

Foam board seems like the easiest way to go.

There is space b/w the noggin (filler) brick and the top and bottom plates. This was done to keep the steam risers behind the drywall. My plan is to install the foam in that space.

Seems like the best bang for the buck is this RMAX foam board. R-13.1 for $30 a board.

RMAX Pro Select R-Matte Plus-3, 2 in. x 4 ft. x 8 ft. R-13.1 Foam Insulation Board

Rmax foam board link

I have a foam gun to fill in the voids.

Here's the space I'm insulating.

Thoughts? Advice?

Thanks

 

[K'ledgeBldr]

Is this is part of the same project you've been working on?
What did you do on the other floors?

Aluminum faced polyiso makes for a good insulating/radiant barrier wall. But, in your case I think not. I wouldn't consider anything other than closed cell spray foam. Not only will it give you the insulating value you need, but it will also give you an airtight wall assembly along with a vapor barrier. The foam would also get between the studs and brick, and probably help stabilize the brick also.

Considering there is not that much wall area- you may want to give it a try yourself with one of those two part kits- comes with everything you need to spray.

 

[branimal]

Is this is part of the same project you've been working on?
What did you do on the other floors?

Aluminum faced polyiso makes for a good insulating/radiant barrier wall. But, in your case I think not. I wouldn't consider anything other than closed cell spray foam. Not only will it give you the insulating value you need, but it will also give you an airtight wall assembly along with a vapor barrier. The foam would also get between the studs and brick, and probably help stabilize the brick also.

Considering there is not that much wall area- you may want to give it a try yourself with one of those two part kits- comes with everything you need to spray.

Same project. For the top floor I hired a crew to spray closed cell. Underside of roof and front and back wall. Cost me about $2000 IIRC. 1300 sq ft. Can't recall the thickness.

A friend wanted wanted 100 sq ft sprayed and that crew wanted $700. I guess most of the cost is just showing up and setting up. I could call them and see what they'll quote me.

I looked into the DIY 2-part kits on amazon and home depot. The reviews are horrendous. So I ruled that out. Maybe there are better kits out there.

 

[K'ledgeBldr]

Yes- definitely stick with what you’ve done already. No reason to start cheapin’ out now- especially with insulation.

The only kit that I’ve had any experience with- and had no problems was the “Tiger” brand. I didn’t actually do the spraying, had a sub do it- but had no problems. Tiger is not the typical big-box stuff.