Full Product Manual

ROCKWOOL
14
Non-Vented crawl space systems
Basements and non-vented crawl space walls –
Header (rim-joist)
If the basement / crawlspace header (rim-joist) needs to
be insulated see Basement Header and Bottom Plate
Details diagram:
1. Caulk or spray-foam any gaps and cracks,
2. Install R22/R23 ROCKWOOL Comfortbatt
®
thermal
insulation into the rim-joist,
3. Where required by local building code, staple vapor
retarder to oor assembly and connect to header
wrap (if present)
Basement and non-vented crawl space walls –
bottom plate
The bottom plate of an insulated wood stud wall installed
against a basement or crawl space wall needs to be
damp-proofed and sealed.
1. At the bottom plate install a thick bead of caulking on
the concrete (or vapor-retarder) oor.
2. Staple 12” of vapor barrier to the bottom of the wall
bottom plate.
3. Install wood stud wall
4. Where required by local building code, connect the
interior vapor retarder with the 12” vapor barrier at
the bottom plate and seal with tape.
1
Header Wrap (Installed from foundation wall to
under main oor bottom plate)
2
Fasten vapor retarder to oor assembly
(sub oor and oor joist as needed)
3
R22 ROCKWOOL Comfortbatt to cover the foam
to top of insulated wall (thermal protection
of foamed plastics)
4
Spray foam/caulking air sealant to act as an air
barrier
5
Connect vapour retarder to header wrap at top
plate
1
Vapour retarder
2
Pressure treated bottom plat
3
12” of vapour retarder; staple to bottom of bottom
plate; tape over poly that runs down the interior face
of the wall
4
Thick acoustic caulking bead for air seal between
bottom plate & oor slab
5
Interior acrylic caulking sealant at the sub oor/plate
joint as alternative to under bottom plate
* Consult your local authority having jurisdiction on the proper
location and installation for the vapor barrier/retarder.