So I set out to build a smoker using 4x8x16 concrete blocks because they are more readily available to me, and also because I feel they'll insulate better. I'm stuck on what to use as the lid, however. Right now I have three 2x6s (spruce) that I'm using as a lid, but I'm afraid that won't last long. The inside dimensions are very similar to a UDS, and the lid sits around 36" above the charcoal basket. Does anyone have any suggestions for a cheap, seal-able lid? Thanks. The layout. Steel supports with cast-iron grates. "Finished" product floated with masonry cement and 2x6 lid.