What is Crown?

by Lawrence Winterburn

“The finest materials, if installed improperly will still just be a waste of wood”

What is Crown?


Every piece of lumber has a slight curvature when viewed from the end. When all the pieces are assembled in a structure in the same direction it will appear uniform. Furthermore; if they are installed crown up (as in illustration), it will actually look, and in fact be, structurally superior.

·         Beams, joists and fence rails should be installed Crown Up.

·         Joists are crucial. If joists are not all crown up the deck will appear uneven.

If material seems to have extensive crown, i.e. more than 5/8” , don’t accept it.. Wood is an imperfect material. There are many techniques for hiding slight imperfections but the materials must be within certain standards.