Applying spray foam insulation

Closed cell spray foam insulation is applied to fill the gaps between the deck i-beams.A smaller foam application pre-fills gaps.The first pass with the sprayer fills the corners helping to make the insulation airtight.Spray foam expands to fill the gap between the overhanging deck soffit and the foundation. This helps create an airtight seal between the deck and the foundation.The spray foam curing in place after the first application. Two applications were made on different days to fill out the thickness of the cavity.LVL’s are glued, screwed and sealed in place to finish the deck perimeter.

Deck framing details

Blocking between the i-beams to provide structural reinforcement and air sealing above the sill and below the floor decking.
Blocking boards  pre-cut in quantity.Blocking installed between the TGI i-beams.Reinforced blocking around glulam support base.
3/4″ Avantech flooring glued and screwed in place.

Sealing the soffit under the deck

The deck extends over the edge of the foundation, overlapping the 10″ blocks of Neopor insulation that that will attach to the foundation wall below. The underside of the cantilever is sealed to make the shell of the house airtight.The underside of each beam is glued with OSI SF-450 adhesive. The bead runs along the perimeter of the connection point. The screws go through in the middle to avoid breaking the bead seal.   The two-by-four lumber under the soffit is an attachment point for the Neopor blocks of rigid foam insulation. The blocks will be notched out to fit. All gaps will be filled with spray foam insulation.

Deck details and the first interior framing

Overview looking North West.Our first interior framing around the stairwell.North West corner detail.Mid-deck structural support for the future glu-lam (glued laminated beam).South West corner support for the glu-lam post.The sill with 14-inch i-beams crossing over a window.

Work begins on the deck

Rain has caused delay, so work on the deck began immediately after the slab was poured.

Our first LVL beam in place.The vertical metal straps cast into the foundation will attach to the future glue lam frame of the house.Detail showing the sill sealer gasket between the sill plate and the foundation. Also, the LVL beam above is glued in place. From the beginning of construction all joints and connections are carefully glued and sealed air tight on the passive house.Connection point on an i-beam glued and sealed in place.At the end of the first day, 14″ LVL and PSL beams installed.