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Stesso

Install Flashing for Water Protection

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Which porch fails? 🤔 learn how to build a porch! #porch #concrete #formwork #learn

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What happens here

To prevent water damage, pull back the house wrap and install metal flashing. This flashing should be positioned so that any water running down the house wrap will hit the flashing and be directed away from the slab and sheathing. Without proper flashing, water can run behind the concrete slab, damaging the sheathing and potentially leading to rot or mold. Ensure the flashing is 'counter-flashing' where it overlaps the house wrap, creating a shingle-like effect that sheds water.

Goal: Protect the house sheathing from water damage by properly installing flashing.

Tools and materials

  • Hammer — Securing the flashing in place
  • House Wrap Lowe's — Part of the house's weather barrier, to be pulled back for flashing
  • Metal Flashing — Creating a waterproof barrier between the porch and the house
  • Colored Liquid — Demonstrating water flow with and without flashing

What they say

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If we use the proper backfill and do the proper compaction, the base will stay strong. If there's no flashing, just install concrete against the house wrap, this water will run behind your slab and damage your sheathing. Pull back your house wrap and add a flashing. Install counter flashing. Now when we get water, the water will hit the flashing and your sheathing will stay dry. If this formwork doesn't get pitched away from the house, water will flow back towards your house. Pitch it

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