How to Build a Screened-In Patio (DIY) | Family Handyman
Use washers, and countersink the washers and the lag bolt heads. Tack sill seal—1/2-in. thick strips to block bugs and water drips—to the back of the posts and beam. Then raise the assembly in place, dropping the posts onto the drift pins. Hold the posts in place with temporary 2×4 diagonal braces.
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