4c as an alternative to floor insulation foundation walls of unvented crawl spaces.
Insulating open web floor trusses.
It is sprayed directly to the underside of the sub floor and adheres upon impact.
Spray foam insulation expands upon exiting the foam gun.
These trusses typically used as joists have diagonal bracing or struts and are made in quebec by open joist triforce.
It must be cut to fit snug between floor joists.
4b slab floors built directly on the ground.
I ll have to do some searching on the paper against the bottom of the floor if you go this direction but one of the experts in the field stated that paper to the warm side of a home was not intended for basements.
Joist bays the open spaces between floor joists are prime hosts for insulation under specific circumstances.
Open web floor trusses.
The joists allowed us to reduce the boxes and bulkhead to hide ducting to almost zero with the exception of inside a main floor closet and the main floor powder room.
Open web floor trusses are constructed with 2 x 4 s on top and bottom with a sort of web in between secured with metal plates.
When the basement or crawl space has vents installed insulating joist bays.
Open web joist chase opening.
Gaps in open web truss or engineered floor joist systems may be difficult to address with this type of insulation.
To achieve the 16 inch depth we wanted for insulation and an air space under the sheathing we used open web parallel chord trusses as the rafters.
Of the conditioned space above.
Open web floor truss insulation options hi bodo and welcome to the forum.
4d extend insulation into joist space to reduce air flows.
It also allowed us to create a basement ceiling with minimal bulkheads except where load bearing beams are installed.