To hit irc code min on a mass wall such as cmu in vt zone 6 takes r15 or 4 of continuous rock wool which could be trapped behind exterior grade 1 5 steel studs to hang the siding onto.
Insulate exterior concrete block wall.
Insulated concrete block is a process that can be done on a new construction project or added to the walls of an existing structure.
Before insulating coat the exterior of the walls with fluid applied water control and air control layers.
We use a two part system that combines a spray dried polymeric resin with a foaming catalyst to create a dry foam that is unlike anything else in the spray foam industry.
This places the thermal mass inside the insulation layer.
This can be done with pretty much any rigid insulation.
How do i insulate walls with stud bays only 1 inches thick.
For decades the best way to insulate concrete block was on the interior of the wall which required framing another wall up against the concrete and insulating between the studs.
Today there is no need to lose out on valuable interior space as you can use external wall insulation to insulate your concrete block house.
I have a 1950s brick colonial with uninsulated concrete block walls.
In these walls continuous exterior insulation envelopes the masonry minimizing the effect of thermal bridges.
The option for insulating concrete block walls includes spray foam insulation injection foam insulation polystyrene beads foam boards and loose fill masonry insulation.
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The process is similar to framing a standard.
And there is no effective way to fill the voids in an existing concrete block wall.
Inside the drywall is nailed to studs fastened flat against the block.
As long as at least half the continuous insulation is on the exterior r15 is fine.
That s because in the past insulating concrete block homes meant adding interior wall insulation by building another wall against the concrete and insulating between the studs.
In your climate zone zone 5 code requires you to insulate concrete block and other mass walls to at least r 13 if all of the insulation is on the exterior.