Step 1: Supplies
Straight edge to cut with
Standard Foam core boards (I used 6)
2 - 8 Foot pieces of Trim
Step 2: Measure and Mark
On the opposite side, just measure and mark half way at the 15" mark.
Step 3: Cutting the Small Teeth
Then from that mark, cut across to the 15" mark.
From that one, cut across again to the other 7.5" mark.
Your pretty much zig-zaging across the board to create 3 teeth.
Save the 2 outside "half teeth" for another project.
Step 4: Cutting the BIG Teeth
Again, try to save the "half-teeth" extras for something else.
Step 5: Test Layout
If you use these exact measurements, you should be about to put 5 small teeth and 1 long tooth on an 8' board.
Remember, your going to be making 2 of these sets, so set your "big" tooth where you want to create that vampire look.
Step 6: Glue and Clamp
Then clamp each tooth and let it set overnight to dry real good, You don't want a toothless house!
Step 7: Duct Tape and Drill
Then drill about 3 holes in the boards down the whole side of it to secure to your home.
Step 8: Final
I add red flood lamps on the ground at night to make it creepier...
This all what works for my house, measurements and such may be different for yours, use your own judgment...