Sealing small holes under cabinets

yonkimanAugust 21, 2014

Hi folks. I'm about to install new cabinets and we'll have the central heat coming through the toekick via 2.5" x 14" metal ducts (see image).

I've done the ductwork and closed up the subfloor, but there are some holes in the floor (a box about about 6x6" mostly under the duct and the irregular cutout for the ducting and water pipe behind it). They will be covered up by the cabinets, but I'm wondering if I should still close them up and if so, what method you would recommend. Cutting plywood to fit would be a challenge and securing it in the hole would be even harder. But duct tape seems like a pretty terrible idea. Is there some material I could lay down over the holes and staple?

Thank you for reporting this comment. Undo
snoonyb

GREATSTUFF.

    Bookmark   August 21, 2014 at 8:52PM
Thank you for reporting this comment. Undo
kirkhall

Fire-retardant/fire okay'd great stuff or other expandable foam (that is fire-rated)

    Bookmark   August 21, 2014 at 10:20PM
Thank you for reporting this comment. Undo
energy_rater_la

flashing. cut it to fit or oversized, caulk under flashing
to wood, and then screw down the flashing.

spray foam expands so much that you can't see
that it isn't sealing, and it shrinks over time.

best of luck

    Bookmark   August 21, 2014 at 10:25PM
Thank you for reporting this comment. Undo
yonkiman

Thanks guys!

    Bookmark   August 22, 2014 at 8:27PM
Sign Up to comment
More Discussions
Getting ready to remodel the second floor, where to start?
We are beginning to interview contractors. Would like...
prairiemoon2 z6 MA
Structural Engineer - What do I need to Know?
I'm planning a kitchen gut/remodel in my three-story,...
Carrie B
Bad Countertop Fabrication
Hello, Hoping to get some advice/opinions! We just...
diynola
Remodel for your taste vs possible sale
We plan to be in our house for 4-5 more years. It's...
thbennet
Do I match exterior door/window hardware to interior?
We will have white interior doors with oil rubbed bronze...
happyallison
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™