Weekend Project – Window Box

Wednesday 11 July 2018

Here is a simple design for a window box. It can be used inside or out, but obviously needs a good coating of wood preservative before use. Both the sides and ends have curved tops and are jointed at a 15° angle. All the components may be cut by hand but cutting the angles accurately is a lot easier with a table saw or mitre saw. The plants could remain in their own separate pots inside it or alternatively, you could fill it with earth, however, it would be wise to line it with thick polythene to protect it if you are going to do this. This is a rather small version, so adjust the dimensions to suit your window.


A sanding disc was used here as a template to draw the curve on the ends


To mark the curve on the sides, a metal rule was used compressed in a bar clamp to make it bend. A piece of thin ply could also be used in a similar manner


Cut out the curves using a bandsaw or a jigsaw. Note the relief cuts in the side to reduce the side pressure on the blade


Crosscut the sides to length


The curved sides can also be cut with the bandsaw


Clamp the two sides together in a vice and, using a block plane, clean up the edges so that they both match. You could also use a sander


Tape the ends together and clean up the curves with the block plane or disc sander


Once all the parts are smooth, they can be pinned together. You should also use glue, and you may prefer to use screws in place of pins, particularly if you are making a large box. Because of the angle, it can be a bit tricky to fit the first joint together, so clamp the end in a vice and then attach the side


Finally, make the base. The edges of this also need to be angled at 15 degrees to match the sides, so use a table saw and tilt the blade to suit. It is difficult to measure the exact size of the base, so make it on the large side and then trim it down to fit

STEP 10:

Crosscut the ends

STEP 11:

Fit the base with glue and pins, and then drill some drainage holes through it. Finally, turn the box upside down and pin a pair of thin battens across the ends to raise it off the ground to help the drainage and also to stop it from rotting

STEP 12:

The completed window box