A small gap beneath a heavy timber post looks counterintuitive. Surely something should fill it? Sometimes that empty-looking space is doing exactly the job it was designed to do.
Identify the connector, not just the gap
Simpson Strong-Tie's post-base discussion explains standoff connections and moisture exposure. The product, anchor, fasteners, and load requirements must work together. Its US examples do not establish an Ontario design for your deck.
Do not hide the part you need to inspect
Decorative post wraps and later landscaping can collect debris or conceal the base. Keep the intended drainage and inspection access. If the wood is soft, the connector is heavily corroded, or the support has shifted, have it assessed. Adding a wedge underneath does not establish that the post or anchor is sound.
Before the next step
- Locate the connector model and installation detail.
- Check whether landscaping or trim blocks drainage.
- Refer movement, decay, or missing fixings for assessment.
Leave a deliberate detail deliberate. Before filling an odd-looking space, find out what the original connector requires that space to do.