How To



There are two basic procedures to
build and install window boxes using
The Window Boxing Mounting Kit.

Pre-Fabricated Method
In Place Method

Following the basic steps as outlined
are a few special procedures for
special conditions noted below.

• Prep for Stone or Stone Finishes
• Bay Windows and Corner Windows
• Artifacts and other things


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Pre-Fabricated Method
In Place Method

Pre-Fabricated Method

STEP 1. Determine where a structural stud is on each side of the window, by confirming with a pilot hole. Click here to download a diagram of a typical window framing.

STEP 2. Measure the distance between the pilot holes that will be used to support the box. On a work bench or table, clamp the brackets the measured distance apart, parallel and square.



STEP 3. With the brackets spread to match the pilot hole dimension cut a facia that will extend past the structural bracket with a mitered cut. (Note - a mitered cut is not required for the most simple designs, if you intend to cover this with a 2x12 or 2ea 2x6 and then with lath and plaster or a siding material the mitered cut is not necessary. A side panel is not required, but in this example we will have a box with matching sides.)

STEP 5. To allow you to attach an end panel, drill 6 to
8 spaced holes in the gusset of the bracket, use short
galvanized deck screws to attach your dimensional lumber.

STEP 6. Mount the brackets to the facia.

STEP 7. Mount the end panels.

STEP 8. Install any finish the mind can conceive. In this case, wood molding. But it could be roofing shingles, siding, decorative concrete molding, stamped metal, copper, polished stone, lath and plaster, tile. A whiskey barrel portion or the weathered remains of the stern of a skiff can be fastened to this substructure.

STEP 9. Mount the partially completed box. One person can install the box by lag bolting the box one end at a time.

Step 10. Install the bottom, suggest 2x dimensional lumber,suitable for the expected conditions. They lay flat on the flanges of the supporting brackets.

Step 11. Install a back. Usually 3⁄4” plywood is suitable. It rests on the bottom flange of the support bracket and leans against the back. The soil will keep it in place when it’s filled.


Step 12. Line the back and then the front with aluminum or galvanized rolled flashing, lapping the bottom, staple or screw to hold in place.

Step 14. Fill it with teenagers to show how remarkably strong your work is!