Building a custom pergola, gazebo or patio cover is one of the best ways to enhance an outdoor living space. Beginning your project with a few simple construction tips in mind — and the right hardware on hand — can go a long way toward making your job easier, and to ultimately creating a pergola that’s both structurally sound and stylish. Here are four tips on how to build your perfect pergola or other backyard structure.
1. Anchor with Accuracy
Securely anchoring your wood post bases into the concrete slab is the first step toward building a safe pergola. Unlike cast-in-place anchors, which are placed in wet concrete and thus are difficult to adjust once the substrate has set, anchor bolts allow for more accurate placement. You can measure, mark and adjust where the anchors will be set on the surface of the finished slab, ensuring a square footprint.
2. Do Away with Dust
Using a hammer drill to drill holes for anchor bolts creates a lot of concrete dust. As you may know, dust prevents adhesive anchoring systems, like AT-XP®, from reliably bonding the threaded rod to the concrete. In order to make sure the holes are completely clean, the industry “4-4-4” method is required. Using a long nozzle, blow compressed air into the hole for four seconds, brush out the hole with four strokes followed by another four seconds of compressed air.
A quick tip for making sure your adhesive is properly mixed: squirt some onto a piece of scrap cardboard until you see an even, consistent color. Then it’s ready for use.
3. Stay Square, Pursue Plumb
While using anchor bolts instead of cast-in-place anchors helps you to achieve greater placement accuracy, our Outdoor Accents® adjustable post bases offer an additional level of precision. The innovative L-shaped hole in the bottom of the base allows you to move the piece around until it’s positioned perfectly.
This post base’s 1″ standoff plate will keep the post itself raised above the concrete. This keeps it out of standing water — avoiding rot and giving your pergola a longer life.
Also, using a post level when erecting your post lets you check the alignment of multiple planes at once, so that your post will be level and plumb.
If you’re using Outdoor Accents hex-head washers and structural wood screws to attach your posts to your post bases, installation is fast because it isn’t necessary to predrill. And holes in the post base are offset, so there’s no need to worry about hitting anything when driving screws from the opposite site.
4. Counter Corrosion
To ensure the pergola you build will be enjoyed for many years to come, use corrosion-resistant hardware for all your connections. Ideally, wood should be pressure treated, manually coated with a preservative or possess natural tannins that act as a preservative — like western red cedar, for example.
All connectors and fasteners in our Outdoor Accents decorative line are galvanized and black powder coated for corrosion resistance.
Hopefully this handful of pointers will make your next custom pergola build easier, stronger and safer.