Diy Grill Frame . A prefab outdoor grill station is going to cost about $2,300. Framed around the grill area with metal 2x4s. DIY Pallet BBQ Grill Table 101 Pallet Ideas from www.pinterest.com We used metal 2x4s directly around the grill area because they would help us achieve a solid heat barrier between the grill and the flammable building materials. To get the proper angle, line up the outer edge of your framing square with the 12” and 4” marks. The scratch coat provides a rough surface for the finishing material to adhere to.