On Mar 1, 8:47*am, "Edwin Pawlowski" wrote:

snip

Also, I've never heard of particle board on a roof. *OSB, plywood or solid
wood is OK,

Isn't OSB 'oriented strand board' ? In other words, large wood
particles and resin matrix. So small wood particles (sawdust) and
resin are MDF or something...very confusing. G

Joe