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Assess Area and Position Flashing

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Be classy, tuck your shirts in and tuck your flashing in 🫡

What happens here

Begin by assessing the area where the flashing will be installed, which is the intersection of the house siding and the top of the deck joists. Ensure the L-shaped flashing is pre-cut to the appropriate length. Position the flashing near the house, preparing to slide it into place. The horizontal flange of the flashing should rest on the deck joists, and the vertical flange should be angled towards the house siding.

Goal: Prepare the L-shaped flashing for installation between the house and deck.

Tools and materials

  • Deck Joists — The structural support for the deck where the flashing will sit
  • House Siding — The surface under which the flashing will be installed
  • L-shaped Flashing — Creating a waterproof barrier between the house and deck
  • Measuring Tape — To measure the length of the area for flashing
  • Tin Snips — To cut the metal flashing to length or shape if necessary