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The 18 Sep 2023 report from L&L (Joe) has 6 sections:
Attic: attic floor joists are not adequately supported from below. Proposed solution is to hang the floor joists from the rafters by attaching 2x4s to each rafter on either side of the ridge pole and to the joists.
Mandette $5400, Higgins $4800
Some first-floor joists are twisting off the beams. Block the floor joists in the crawl space on top of the beams and at midpoints to the sills.
Mandette quote is $4640. Higgins includes this in the $69,500 for 1 and 11 work.
Correct the offset of first floor bearing walls around staircase by ‘filling’ on top of the main beams to the flooring with sistered 2x10s at each joist to ‘catch’ the bearing walls above.
Mandette quote $5200. Higgins included.
Install 3/4” steel plates between columns and beams. Address moisture.
Replace lally columns and support with 2.5’ x 2.5’ x 1’ reinforced footings on top of the slab.
Items 4 & 5 are connected and moisture remediation is addressed in item 6.
Mandette quote for footings, columns, and plates: $11,300. Included in Higgins general quote. TC Hafford quote of $13,561 for SmartJacks also includes dehumidifier which has been installed to be netted out.
Moisture, heating, and insulation. The first floor is not insulated between the joists. Mandette would insulate between joists for $2600.
Insulate interior of foundation walls and 4’ on the slab all the way around with spray foam or rigid closed cell panels. Mandette quote for this part is $3600.
Install 6 mm vapor barrier over all walls and slab. Install heating to maintain 65 degrees year-round and fresh air ventilation.
Mandette quote does not address these two items and it is not yet clear what parts are included in Higgins’ quote.