Here's a good one for you all:
I've been in a lot of old theatres lately, and am noticing a black substance
on the interior face of the bricks. It seems that bricks making up walls
with an exterior face have had their interior side coated with some
elastomeric substance, or maybe...pitch? We figure that it was some sort of
barrier between the brick and the scratch coat of plaster applied directly
onto it. Any takers?
Cheers,
Molly
Hayles & Howe Ornamental Plasterers
3500 Parkdale Avenue
Building One West, Ground Floor
Baltimore, Maryland 21211
410.462.0986 (F) 410.462.0989
http://www.hayles-and-howe.com/[log in to unmask]