LumberJocks

Reply by Lazyman

  • Advertise with us

Posted on Which nails should I use?

View Lazyman's profile

Lazyman

2559 posts in 1560 days


#1 posted 02-14-2018 03:56 PM

Gap requirement depends upon how dry the wood is now and the local and indoor humidity swings. Hemlock’s tangential shrinkage factor is between about 7 to 8% which, if I am doing the math right, would roughly equate to about .015” shrinkage/expansion per percent of moisture change (for new wood) for a 6” wide board. If it has a relatively high moisture content now and it will be in a humidity control space, it may shrink noticeably so would probably need almost no gap. If by mushroom wood you mean salvaged wood , I am not sure what effect that has on shrinkage and expansion, especially if it already has cracks and fissures.

BTW, the recommendation to paint the wall behind the joints is a good one. If the wood will not be painted, I would not try to match the color but just paint a black strip behind the joints. I’ve even used a wide tipped Magic Marker or Sharpie for that. You just don’t want a lighter colored wall to show through the gap.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.


DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com