Editing Openai/6928dffa-2c40-800e-b585-2520d50a2cbb (section)

=== Practical installation tips (minimize problems) ===
* Check the product PDS / ICC report before using for anything structural. If PDS says “not for decks/structural,” use concrete (or an ICC-approved foam deck anchor). Sika USA<ref>{{cite web|title=Sika USA|url=https://usa.sika.com/retail/en/products-catalog/post-setting/sika-postfix.html|publisher=Sika USA|access-date=2025-11-28}}</ref>
* Depth: follow local frost depth rules. If you’re above frost depth (non-critical fence), many people use the manufacturer’s recommended hole depth/diameter; for frost areas or load-bearing posts, set below frost line or use appropriate anchors. Sika USA<ref>{{cite web|title=Sika USA|url=https://usa.sika.com/retail/en/products-catalog/post-setting/sika-postfix.html|publisher=Sika USA|access-date=2025-11-28}}</ref>
* Drainage: don’t pour foam into a hole with standing water. If groundwater is present, pump or backfill with gravel first. Foam manufacturers specify the hole must be free of standing water. Sika USA<ref>{{cite web|title=Sika USA|url=https://usa.sika.com/retail/en/products-catalog/post-setting/sika-postfix.html|publisher=Sika USA|access-date=2025-11-28}}</ref>
* Protect the post: use pressure-treated lumber or a metal post base to reduce wood-in-soil rot risk. If concerned about foam trapping moisture at the post bottom, install a sleeve or metal base/flash. Sawmill Creek Woodworking Community<ref>{{cite web|title=Sawmill Creek Woodworking Community|url=https://sawmillcreek.org/threads/does-setting-posts-in-foam-give-them-some-protection-from-dry-rot.285715/page-2|publisher=Sawmill Creek Woodworking Community|access-date=2025-11-28}}</ref>
* Bracing: brace and plumb the post until the product has set. Foam sets fast, but you still need the post held vertical while you mix/pour. Sika USA<ref>{{cite web|title=Sika USA|url=https://usa.sika.com/retail/en/products-catalog/post-setting/sika-postfix.html|publisher=Sika USA|access-date=2025-11-28}}</ref>