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Project Sequencing and Scheduling

  1. The roof work can proceed at any time as the roof truss depth is adequate to allow mechanical systems "below" or "inside" of the insulation.  Our productivity will be better if there are as few rough-ins in place as possible.

  2. The walls can be sprayed at any time from our perspective, but my experience is that waiting for wall rough-ins is better for the electricians and plumbers.  While there still will be space available in the 6" wall cavity after our work, drilling the studs, installing boxes, and pulling wires will be harder after the foam is installed.  Any notching or drilling for inside to out wiring and piping runs will have to be touched up after the rough-ins.  If there is plumbing in the outside wall, soldering can be more of a problem after foaming than before the insulation, and larger diameter PVC back vents could be more difficult to drill for and install.  Some foam may have to be notched, especially where pipe runs are going up through the top plate and rim joist areas.

  3. Ceilings in the basement and first floor can be sprayed, but strapping is a major detriment to productivity.

  4. Sequencing for spraying the interior ceilings for sound control and the radiant heating system has two issues to consider.  Spraying the ceilings should be done before recessed lights, ducts, and large piping are installed (less masking, better access).  There is plenty of framing depth so that the access issues for other trades found in the walls don't apply, and our work will be much faster without them in place.  The exception would be around the perimeter.  Running wires or piping from one floor to the next would be more difficult for other trades after we spray the rim joists.  You may want to have the plumbers install their drops through the shoes and the electricians install short pieces of flexible conduit prior to foaming so that wires can be pulled easily after the fact".

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