Insulating Open Web Floor Trusses

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.

Insulating open web floor trusses.

Open web floor truss insulation options hi bodo and welcome to the forum. I have these in my home and i use the space for extra storage as you can see in the picture. Open web floor trusses. Gaps in open web truss or engineered floor joist systems may be difficult to address with this type of insulation.

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. 4b slab floors built directly on the ground. Also insulate 4a any portion of the floor in a room that is cantilevered beyond the exterior wall below. It is sprayed directly to the underside of the sub floor and adheres upon impact.

It must be cut to fit snug between floor joists. 4c as an alternative to floor insulation foundation walls of unvented crawl spaces. It also allowed us to create a basement ceiling with minimal bulkheads except where load bearing beams are installed. Joist bays the open spaces between floor joists are prime hosts for insulation under specific circumstances.

When the basement or crawl space has vents installed insulating joist bays. The open space is ideal for running wires pipes and utilities. Spray foam insulation expands upon exiting the foam gun. 4d extend insulation into joist space to reduce air flows.

These trusses typically used as joists have diagonal bracing or struts and are made in quebec by open joist triforce. 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.