How to Install Wall Molding Like a Pro

How to Install Wall Molding Like a Pro

Hey there, it’s Harper 👋

You know I’m all about that polished, custom-wall look — and the truth is, wall molding is one of the simplest ways to get there. Whether you’re working with pre-cut panels (like the ones I use from Moldart!) or crafting your own layout, the key to a beautiful result is installation done right.

Let me walk you through my full process, step by step — no stress, just gorgeous walls ahead. ✨

🪄 Step 1: Lay out the Panels on the Floor

Before anything touches the wall, I always lay the panels out on the floor, according to the design plan. It helps me visualize the final look and make sure every length and joint fits perfectly.

🔍 Tip: Molding strips come pre-cut at 45° angles from Moldart — once joined, they create that seamless frame finish we love.

🧼 Step 2: Clean and Prepare the Wall

Dust and grease are your enemy here! Make sure the wall is completely clean and dry.

🧻 I also use painter’s tape to outline the full layout right on the wall. This gives me a perfect visual guide for mounting.

📏 Step 3: Use Spacers for Consistency

Uniform spacing = professional results.

I always use a wooden spacer block to make sure each panel sits evenly. Even a small gap difference throws off the balance — and your eye will notice.

🧪 Step 4: Apply Adhesive and Mount the Panels

Grab your liquid nail adhesive (this is the only type I trust) and apply a solid zig-zag pattern to the back of each molding piece.

Then:
Press the molding firmly onto the wall
Hold for 20–30 seconds
Use painter’s tape or temporary supports to keep it in place while drying

⚠️ Don’t use silicone for adhesion — it’s only good for gap sealing, not holding trim!

🖇️ Optional: Assemble Panels on the Floor

Want extra control? You can pre-assemble frames on the floor using quick-dry glue and paper tape, then mount the full piece as one unit.

🔫 Bonus for Durability:

For added strength — especially on long or heavy pieces — I sometimes use a nail gun to tack the molding into place. Just a couple of discreet nails make everything more secure without damaging the look.

🎨 Painting Your Molding

All Moldart moldings are factory-primed, so there’s no need for sanding (yay!). You can paint them before or after installation, depending on what’s easiest for you.

🪛 Step 5: Final Touches

Use caulk to fill any tiny gaps between the molding and wall. If you used nails, cover the holes with putty. Then paint touch-ups as needed for that crisp, seamless finish.

⚙️ Tools You’ll Need:

Spirit level
Liquid nail adhesive
Brad nail and nail gun 
Silicone sealant
Blue painter's tape
Measuring tape
Quick glue
Laser Level (optional)

Summary

Installing wall molding is one of the most satisfying upgrades I’ve done in my home. When you follow the steps — layout, prep, spacing, adhesion, and finishing — you get a result that looks high-end and holds up beautifully.

Whether you’re after that classic picture-frame style or something more geometric, Moldart panels make it easy to DIY like a designer.

You’ve got this 💪— Harper