RetroFoam vs. Cellulose Wall Insulation
We just bought a 1904 Foursquare in Seattle. We have already insulated the attic (cellulose) and are moving on to the exterior walls. We are getting some competing opinions on what material to use.
1) we have a little kid and 2) we have lath and plaster walls
From the pro-cellulose camp we’ve heard:
Retrofoam can shrink until it sinks to the bottom of the wall cavity leaving a powder, and that the chemicals used in the materials can have off-gasses. The folks that sell Retrofoam say it’s an organic material and will not have off gases.
Cellulose can cause a lot of dust and often expands/puts pressure on the interior walls that can crack the lath and plaster walls and do permanent damage. Cellulose, though recycled is treated with chemicals to make it fire retardant, and these chemicals are hazardous.
While we are planning on redoing the walls as well, we don’t want to cause any more damage to them. We also want to make sure our kiddo doesn’t inhale a bunch of dust or chemicals. We aren’t living in the house right now and won’t be until after the insulation and a bunch of other stuff is complete.
Any ideas about which insulation to choose? The walls are empty right now.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part