I decided to hang them because I have egress windows so I couldn’t put them on the sill where the crank handle is. At 27 inches wide I knew I could use 1x6s cut at that length and then a 1×4 in the bottom creating the depth. I gathered my materials and cut all of my pieces before assembling.
To assemble I used my brad nailer with my air compressor, you can use screws in this case but make sure and pre-drill before hand, anything that’s only the depth of a 1x will split. Once assembled I stained them with Minwax dark walnut stain and added some old wood to the fronts for character. Remember how that old sink I used in the basement came in its original crate? Yup those two boards came off of that!