Extension floor joist levelling

[magico]

Hi so hopefully this weekend I'll be levelling floor joist to existing house floor.
If say the 1 of the masonry hangers I used is 1 or 2 mm out .is it OK to use plastic packers under the joist in hanger?

 

[freddiemercurystwin]

1mm? That's pretty shoddy workmanship.

 

[magico]

I'm not saying they are. Just trying to get it bang on

 

[John D v2.0]

1mm thick you could cut a bit off a spare hanger to pack that. But the floor boards you use probably have similar tolerance anyway

 

[Doggit]

The plastic packers will be fine, and then nail in from the sides.

 

[^woody^]

The plastic packers will be fine, and then nail in from the sides.

Are you sure?

What if they do compress and the joist drops 1mm, that could be bad.

 

[Doggit]

Most of the current plastic packers that they sell nowadays don't seem to be compressible, and unless there is a high degree of loading on that particular joist, if it should compress, and would only drop by about half a mill, so I don't think it would be an issue. You reckon that slate would be better, or what else would you suggest.

 

[^woody^]

I'd suggest not worrying about 1mm when a level can be 0.5mm out per metre.

Or use sandpaper where the boards meet.