Simple Playhouse — Back Wall Panel

Mark both the top and bottom plates where each stud lands, then predrill all the holes in the plates. Fasten the seven studs to the plates, working across the wall.

Check for square once all the studs are fastened — measure both diagonals and adjust until they match. A wall framed out of square makes every later step harder and won't mate cleanly with the rest of the playhouse.

Take a full sheet of 1/4" plywood and trim 6" off the end to get a 90" x 48" panel. The 6" comes off so the overall wall stays under 96" and drops onto a standard 8-ft deck platform without extra cutting.

Glue and fasten the panel to the frame with 1-1/4" nails, keeping the edges flush to the plates and outer studs.

Cut the longer top and bottom 1x3 trim first and glue and nail it down with 1-1/4" nails. Then add the 1x2 side trim at the ends, keeping the outside edges flush.

When you assemble the playhouse, this back wall sits inside the gable end walls. Screw through the inside of the back wall into the gable end wall with 3" screws — you'll need to drive them at a slight angle to catch the framing.

Before finishing, prime and paint with an exterior-rated finish; this panel is fully weather-exposed.