Nail Vinyl Siding Loose Enough to Slide — Center of the Slot, Head Just Kissing

The Problem

Vinyl siding fails at the hammer, in both directions. When you drive the nails home like sheathing, the panel is locked solid — it can't move, so when summer heat expands it, the wall ripples with waves you can see down its length in raking sunlight. Nails left too proud have the opposite problem: a loose 12-footer flops and waves in the wind instead of the sun.

The Technique

They call it hanging siding for a reason — the panel is supposed to hang on the nails and stay free to move:

1. Nail in the center of the slot, not at either end — the slot exists so the panel can slide as it expands and contracts, and a centered nail gives it travel in both directions.
2. Drive until the head just kisses the nailing hem — then stop. Leave a sixteenth to an eighth of an inch of play between the head and the vinyl.
3. Check the panel after nailing: it should slide side to side with light hand pressure. Locked solid means overdriven; visibly sagging or rattling means too loose.

Held to the wall, free to move: that's the whole spec.