
Hi all, I'm building a built-in bbq unit from formply, the cladding it in 90mm merbau decking boards .
I was think of using F-27 290 X 45mm merbau X 2 as a bench top.
What gapping would I need between the two ? I was think that with the size and thinkness I might get away with 3mm of less?
Thanks in advance