shimming a header

jaansuFebruary 3, 2013

I'm building a support header for a floor to allow tiling above. My header doesn't contact all the joists since they have a little variation. I need to shim where there are gaps between the header and the joists, but the commercial pine shims look too soft for all the pressure they will see. Anything else better for this application?

Thank you for reporting this comment. Undo
millworkman

I would use metal shims

    Bookmark   February 3, 2013 at 5:58PM
Thank you for reporting this comment. Undo
snoonyb

"they have a little variation."

In order for your header to accomplish it's function it needs to loaded, so forget the shims, load the floor with the tile.
If you shim several, load the floor and a "little variation" occurs in the rest, are you then going to shim again, or remove some of the previously placed shims?

    Bookmark   February 3, 2013 at 7:44PM
Thank you for reporting this comment. Undo
sombreuil_mongrel

If I was going to the trouble of adding a mid-span beam, I'd be very tempted to break the backs of the joists by cutting them through so the weight is all on the new beam from the get go, much less shimming required.
Casey

    Bookmark   February 4, 2013 at 12:00AM
Thank you for reporting this comment. Undo
bus_driver

"If I was going to the trouble of adding a mid-span beam, I'd be very tempted to break the backs of the joists by cutting them through so the weight is all on the new beam from the get go, much less shimming required.
Casey"

This would not be my choice.

Older joists perhaps were never "dressed" (run through a planer) for smooth surfaces and uniform size. They may vary in size when sawn from the log. In one case, the gap that developed between the top of the some of the joists and the subfloor boards was just a few thousandths of an inch. Coating business cards with Gorilla glue and inserting in the gaps ended the squeaks.

    Bookmark   February 4, 2013 at 7:45AM
Thank you for reporting this comment. Undo
jaansu

I found composite shims in the lumber area of HD. This seems to be what is usually used. Perhaps metal would compress even less but these are rated for very high loads.

I'm not sure how loading the floor would cause new spaces to open up. More likely it would cause any existing ones to collapse. But that is exactly what I don't want since it would imply deviation from what seems to be a flat floor at the moment.

I'm probably overengineering this since I am adding 5/8" plywood on the floor anyway and then Ditra before tiling, but the composite shims should keep the joist aligned as they are now.

    Bookmark   February 6, 2013 at 3:50PM
Thank you for reporting this comment. Undo
brickeyee

"I am adding 5/8" plywood on the floor anyway"

That does not reduce deflection by an appreciable amount.

    Bookmark   February 7, 2013 at 4:28PM
Thank you for reporting this comment. Undo
alan_s_thefirst

Incompressible shims are the way to go, those composite ones are probably best, or metal. Don't hammer them in so much that you raise the floor.

    Bookmark   February 8, 2013 at 3:41PM
Thank you for reporting this comment. Undo
jaansu

Those composite shims did the trick. I did put them in really snug and since I noticed the next joist/shim interconnection was now loose, backed off a little on it.

    Bookmark   February 11, 2013 at 6:03PM
Sign Up to comment
More Discussions
T1-11 siding: Replacing rusted z-flashing?
I have several questions about z-flashing for T1-11...
rogerv_gw
Big shelving project part 2
This is a follow up to this thread: http://ths.gardenweb.com/discussions/2604905/big-shelving-project This...
springcorn
Door knob
My front door knob screws won't stay tight so if I...
padfoot4768
Sidewalk crack
Any way to fill/hide this crack? I could cut slot wider....
stoveguyy
Roof leak - best way to find it?
Hi Everyone, I am a condo owner in New Jersey and own...
cpannetti
Sponsored Products
Plastic Toilet Shim
Signature Hardware
Tile Spacers: Custom Building Products Flooring SuperiorBilt Small Wedge Spacer
$5.97 | Home Depot
LED Bicycle Tail Light with Laser Light Lane
Super Bright LEDs
Tile Spacers: QEP Building Materials Tile Wedge Spacers for Alignment and
$5.97 | Home Depot
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™