Make your house numbers stand out by mounting them on colorful blocks of different thicknesses. It's a fun, simple way to say "welcome".
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For an address with four numbers, cut the craft board into blocks -- one each -- of these lengths: 3-1/8-in, 6-1/4-in, and 12-1/2-in. If your address uses only three numbers, cut the longest block 9-3/8-in instead of 12-1/2-in and omit one of the paint colors.
Sand each block with 120-grit and 220-grit sandpaper. Wipe clean.
Glue and clamp the 6-1/4-in piece centered on the 12-1/2-in piece and let dry for two hours. There should be 3-1/8-in insets from both ends. Then glue and clamp the 3-1/8-in flush with the left end of the 6-1/4-in piece and let dry.
Paint the two single-thickness ends first and let dry. (We used Brushed Orange and Grand Hotel Geranium Pink.) Repeat to add a second coat. Tape off one of the painted areas on the faces and edges. Then apply two coats of a third color (Rapids, in this case) to the triple-thickness section and let dry. Tape off the opposite end and the triple-thickness section, and then paint the remaining double-thickness section with two coats (Chickadee).
Apply glue to the back of a house number and clamp it centered in the space of one block. Clamp or use nails included with the house numbers to secure the number in place while the glue dries.
On 3/8-in-thick blocks where the house number nails may break through the other side, use wire cutters to shorten the nails. Then use needle-nose pliers to hold the nail while you start to drive it in place.
Wash and dry the area of the siding where you'll attach the house numbers. Apply construction adhesive to the back of the block and press it in place against the siding. Tape or hold the numbers in position until the adhesive starts to set.
Use vertical beads or large drops of adhesive to avoid trapping moisture between the block and the siding on textured surfaces like the one shown.