I am starting to lay my wide board floors . Both Oak and Ash . The boards have been air dried for 4 years ( the last 6 months in my garage under a tart with a dehumidifier ) . Moisture ontant was checked at eh begoinning of winter and was betweern 7 and 10.

The widths range from 7" to 10" ( with some Ash up to 13" ) .

I have tongue and grooved them but I have heard several options for attachment .

I was going to lay felt paper , Back prime the boards w/ water based poly and conventionally nail / staple the edges. Finish will be oil based poly.

But I have also been told to use a construction adhesive and Face screw & bung the boards.

I am putting this down ( in the spring ) in a house that does not use the central air very often, so I am also thinking that I should not but the boards together too tightly , in fact , maybe leave a 32nd gap.

I could live with gaps but am afraid that the boards will buckle if laid to tightly.

Any advice would be greatly appreciated.