Fast Floors With Structural Insulated Panels - Images 1-10

Using floor panels supported by engineered-lumber girders cuts production time on SIP houses.

In preparation for the SIP floor for this 8-by-16-foot sunroom addition, the crew fastens an LVL ledger beam to the edge of the conventionally framed main floor, leaving a shimmed space below the ledger to receive the bottom edge of the panel.

The crane's straps attach to a steel plate that's screwed directly to the SIP.

While the floor panel is suspended from the crane, one crew member drills holes at anchor-bolt locations while another applies adhesive sealant to the treated-wood sill.

Finally, the crane lowers the panel into place, where it will be nailed to the sill.

Larger and more complicated SIP floors need underfloor support. Parallam (shown) and LVL beams match up well with SIPs because of their engineered strength, limited shrinkage, and dimensional consistency

Placing an LVL beam

A pneumatic palm nailer helps for driving hanger nails into the hard engineered beams.

After the crane drops four 8-by-24-foot 12-inch-thick floor panels into position, the perimeters are nailed to the pressure-treated sill.

Panels are fastened to bearing beams with epoxy-coated self-tapping screws.

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