If you want your porch posts to last, don’t overlook how they touch the ground.
Choosing the Right Material
Wood posts require sealing and maintenance to prevent rot and keep them looking good. Composite or PVC options offer durability with less upkeep. Choosing the right material typically comes down to the look you’re wanting to achieve more than anything else.
The Threat of Moisture
The biggest enemy of porch posts is moisture. If they sit directly on concrete, they can suck up moisture, leading to swelling, cracking, and eventual decay. Even non-wood materials aren’t immune.
Aluminum Plinth Blocks
The best way to protect your porch posts? Aluminum plinth blocks. These create a barrier between your posts and the concrete, preventing direct contact with moisture and stopping them from absorbing water. You’ll prevent those crusty, moldy bottoms or premature rotting. They also provide a clean, finished look and add a layer of structural support.
Installation Options
You have two installation options. Fully visible plinth blocks create a bold, clean look where the entire post sits directly on the block, while recessed installation tucks the block inside the post base, leaving just a small, subtle reveal. Both options work beautifully—it just depends on your style preference.
Post Maintenance
Wooden posts should be properly sealed or painted with a weather-resistant coating, and all materials should be cleaned periodically to prevent dirt buildup, mold, and mildew. Checking for cracks, warping, or other signs of wear once a year can help you catch small issues before they turn into costly repairs.
Start picking out your new home selections now and don’t miss a thing during your home building process with the Ultimate Home Building Checklist!
