While floating shelves offer a clean and minimalist aesthetic, it's not uncommon for them to tilt or sag. Here are some handy ...

Measure the distance between studs and subtract 1/2 inch to determine ... before you nail the remaining ends and side. Cut ...

Alternatively, you could drill pin holes for shelf supports so you have adjustable ... described above—cutting out some drywall between studs to gain access to the void under the stairs, then ...