Should we install drywall sheets horizontally or vertically if we screw them on horizontal furs?
I know the question has been asked on this site in the past and I remember Iggy's answer (see below), but then I wonder if we should not install the panels horizontally on horizontal furs for reason #2 given by Iggy’s answer?
Iggy’s Answer:
Should drywall be hung horizontally or vertically?
Vertical Only, here’s the proof & truth!
Why and How Horizontal’s Wrong (and why Vertical’s right)…don’t ruin
new from the start:1 – Defective Seam …
2 – Unsupported Seam – Horizontal’s tapered edge is 90% unsupported, only 10% (instead of Vertical's 100%) contacts framing,
the seam will and does crack. Light switch and countertop
electrical boxes within the seam equals more weakness and butt-joint
doubled, minimum, efforts.3 – Structural Defect – …
Best Answer
I've always been told horizontal, and it makes sense in that it makes taping easier and and reduces joints.
The main reason I've been told is that you want to avoid having a continuous seam from floor to ceiling. When the house settles, these are more likely to form a crack.
Also you don't want to place drywall seams at the corners of doors or windows. Previous owners (or whoever) put seams at the bottom of my windows and I've got nice cracks from the corner of the windows to the floor. As long as the horizontal seams are screwed very close to the edge at each student, I'm not sure how a horizontal crack could form.