How to Use This Calculator

Select your joist spacing (measure center-to-center between joists) and subfloor material type. The calculator provides edge and field spacing requirements per building codes.

Why Accurate Subfloor Screw Spacing Matters

Proper screw spacing eliminates squeaks, prevents floor bounce, and ensures structural integrity. Under-fastening leads to movement and noise; over-fastening wastes time and money. Code compliance prevents inspection failures.

Common Mistakes to Avoid

Using nails instead of screws, incorrect spacing causing squeaks, not staggering sheet seams, failing to leave expansion gaps, and not gluing subfloor to joists.

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