Day: May 14, 2026

Contractor measuring a deck frame with a tape measure during backyard construction. Dimension labels and a visual 3-4-5 triangle guide illustrate deck layout accuracy, framing techniques, and construction planning, highlighting precise measurements and structural alignment in a residential outdoor building project.

The 3/4/5 rule is the fastest way to confirm your deck frame is perfectly square before

Illustration of deck construction showing the “30cm Airflow Rule” for optimizing deck lifespan. Measurements, airflow arrows, and framing details demonstrate proper ventilation beneath a raised deck to reduce moisture buildup and improve durability in an outdoor residential setting.

The 30cm rule for decking means the underside of your deck frame should sit at least