“Cost” of uninsulated concrete
I’ve heard a variety of conflicting answers to this question. Trying to understand the _real_ impact, and whether it’s worth the cost to remediate or not.
View Image View Image In the pictures, you see the building (Ohio), which is sprayed concrete with exterior polyurethane foam. Focus on the canopy over the doors and the canopy over the windows. These also are 3″ of foam over 3″ of concrete. But for the canopies, the underside of the canopy is not foamed, and because that concrete connects to the concrete of the shell with no thermal break, there’s heat loss in winter. The net area of all these spots where the concrete canopy connects to the otherwise insulated concrete shell is about 7 sf (28′ x 3″/ft) for each canopy 100 sf. Owner says he can feel those areas as colder than other areas. Now, those areas have windows, too, so it could be difficult to separate the sources of any heat loss one perceives. To foam, sand, shape, finish these areas during construction would cost probably $500-$1000 per canopy (10-15 canopies), mostly in labor, as it’s a real pain in the butt process. How would you analyze the decision to foam or not foam those areas? View Image