If you’ve walked into a properly finished home, you’ve probably noticed those crisp, layered lines running along the bottom of every wall—those are decorative molding additions to skirting boards, and they’re the small detail that turns a basic interior into something polished. For years, I’ve supplied skirting boards to tradespeople, renovators, and even first-time DIYers, and one question comes up again and again: “How do I attach that molding without it looking messy?” It’s not rocket science, but there are a few small tricks that make all the difference between a project that looks like a weekend job and one that feels intentional. Let’s break this down step by step, from choosing the right molding to the final trim, so you can get that professional finish your space deserves. Skirting Board
First, let’s talk about why you’d even want to add decorative molding to skirting boards. Basic skirting boards serve a functional purpose—they cover the gap between the wall and floor, protect the wall from scuffs when you move furniture, and hide any wiring along the base of the wall. But decorative molding takes that function and elevates it. It adds architectural interest, which is perfect if you have a plain, modern space that feels a little flat, or an older home where you want to restore original charm without a full renovation. I recently worked with a homeowner who had a 1950s bungalow with generic MDF skirting; adding a simple oak molding trim along the top made the whole downstairs feel cozier, like it had always been that way. The best part? You don’t need to replace your existing skirting to do it. That’s a big win for people on a budget, or anyone who doesn’t want to tear out perfectly good trim.
The first, and most critical, step is choosing the right molding for your skirting. Not all molding is created equal, and pairing the wrong profile can throw off the entire look. Let’s start with material. Most of the skirting boards I supply come in three main materials, and the molding additions match each perfectly. If you have wooden skirting (like solid pine or oak), go for solid wood molding. It moves with the temperature and humidity, so it won’t warp or crack differently from your existing skirting. That’s a big one—using MDF molding on solid wood skirting is a recipe for gaps down the line, because the two materials expand and contract at different rates. For MDF skirting (super common in new builds, since it’s affordable and easy to paint), MDF molding is the way to go. It’s smooth, takes paint well, and won’t split if you nail it correctly. And if you have vinyl or PVC skirting (popular for high-moisture areas like bathrooms), go for PVC molding—it’s water-resistant and flexible, so it fits curves better too.
Next, profile. You want the molding’s shape to complement, not compete with, your existing skirting. If your skirting is simple and flat, a thin, rounded “torus” molding (that’s the one with a gentle half-circle shape) works beautifully—it adds subtle depth without being loud. If your skirting already has some detail (like a slight chamfer along the top edge), a decorative “ogee” molding (the S-shaped profile that’s common in classic interiors) or a small step molding will fill that space perfectly. A common mistake I see is people choosing molding that’s too tall. A good rule of thumb: the molding should be no more than a quarter of the height of your existing skirting. If your skirting is 100mm tall, stick to 25mm molding max. Anything bigger will look bulky and overwhelming, not elegant.
Once you’ve picked your molding, you need to measure correctly—and this is where a lot of people go wrong. I can’t stress this enough: don’t just eyeball measurements. Walls are almost never perfectly straight, especially in older homes. Grab a tape measure, a pencil, and a piece of scrap cardboard to write measurements on. Start by measuring the length of each wall, from corner to corner. Write those numbers down, and then double them—yes, double. Because when you cut the miters at the corners, you’ll need a little extra length to account for the angle. For example, if a wall is 2 meters long, you’ll want a 2.1-meter length of molding, just to be safe.
Now, cutting the miters. This is the part that intimidates DIYers the most, but with the right tool, it’s easy. You don’t need a fancy compound miter saw—even a basic miter box (that little plastic or wooden frame that holds your saw at an angle) works for small jobs. For internal corners (where two walls meet at a right angle, like inside a room), you’ll cut each end of the molding at a 45-degree angle, sloping towards each other. For external corners (where walls stick out, like the corner of a hallway), you’ll cut each end at a 45-degree angle sloping away from each other. The key here is to test the cuts on scrap pieces of molding before you touch your good pieces. Hold the two cut ends together and check that they line up perfectly, with no gaps. If there’s a gap, adjust your angle slightly—even a 1-degree difference is enough to throw it off. If you’re using wood, a little sanding on the cut edges can fix small gaps. For MDF, you might need to fill tiny gaps with putty before painting.
Now, prepping the skirting and molding for installation. You don’t want to add molding to a dirty, dusty surface. First, wipe down the top of your existing skirting with a damp cloth and let it dry completely. If there’s any loose paint or peeling trim, sand that area lightly so the molding adheres well. If your skirting is brand new, give it a light sand too—just enough to take the shine off, so adhesive sticks. For molding, if you’re using solid wood, you might want to prime it first, especially if you’re painting it. Solid wood can absorb paint unevenly, so a primer coat ensures a smooth finish. For MDF, priming is non-negotiable before painting—MDF will swell if it gets wet, so primer seals it.
Now, the big step: attaching the molding. There are two main ways to do this, depending on how permanent you want it, and whether you’re worried about damaging your existing skirting. The first is adhesive only. This is great if you’re not confident with nails, or if you don’t want to put holes in your skirting. Use a construction adhesive that’s designed for the materials you’re working with—LIQUID NAILS makes a line that works for wood, MDF, and PVC. Apply a thin bead of adhesive along the back of the molding, then press it firmly onto the top of the skirting. Hold it for 10-15 seconds to make sure it sticks, and then wipe away any excess adhesive that squeezes out with a damp cloth before it dries.
The second method is adhesive plus nails. This is more secure, especially for longer runs of molding or in high-traffic areas. I recommend finishing nails, not big construction nails, because they’re smaller and less likely to split the molding. For wood molding, you’ll want nails that are 19mm long—they’re long enough to go through the molding and into the skirting, but not so long that they poke through the other side. For MDF, use 16mm nails to avoid splitting. When nailing, place the nails every 300mm to 400mm along the molding, and also at each corner. A trick I teach all my customers: don’t nail all the way in with the first hammer strike. Make a small indent with the nail, pull it out, tap it in slightly, and then fill the hole with putty. This prevents the wood from splitting, which is one of the most common mistakes. For external corners, be extra careful when nailing—line up the two pieces first, then nail each side one at a time to keep the angle perfect.
Wait a second—what about gaps between the molding and the wall? Sometimes, even if your walls look straight, they’re not. If you see a small gap, especially along a long run of molding, don’t panic. You can use paintable caulk to fill it. Choose a silicone-acrylic caulk, which is flexible and won’t crack as the house shifts. Run a thin bead of caulk along the gap, then smooth it with your finger (or a caulk smoothing tool, which is super cheap) to make it look seamless. Wipe away any excess immediately, and you won’t even notice the gap was there.
Now, finishing touches. Once the molding is installed, you need to fill all the nail holes. Use a wood filler for solid wood molding, and a wood filler designed for MDF for MDF molding. Smooth the filler so it’s level with the molding, and let it dry completely (follow the instructions on the can—usually 24 hours, depending on temperature and humidity). Once dry, sand the filled areas lightly with fine-grit sandpaper (220 grit works great) so they’re smooth to the touch, then wipe away all the dust. If you’re staining the molding, do that now before you add the final top coat. If you’re painting, prime the molding if you haven’t already, then apply two coats of paint, letting each coat dry fully. The key here is to use the same paint as your existing skirting—matching the sheen is just as important as the color. If your skirting is satin, don’t use flat paint on the molding; that will create a noticeable difference and ruin the polished look.
I’ve helped hundreds of customers install this molding, and I can tell you even the most inexperienced DIYers can get great results if they take their time and don’t rush. The worst thing you can do is try to cut corners—like skipping the test cuts, or nailing too hard, or not filling the nail holes. Small, careful steps make all the difference. And for the record, this isn’t just for homes. I supplied molding for a small coffee shop renovation last year, and adding that decorative skirting trim made the entire space feel more welcoming and finished, without a huge cost.
Now, if you’re ready to start this project, I always recommend getting the right materials first. I supply a full range of skirting boards and matching decorative molding, so you don’t have to mix and match products that might not work well together. We can help you pick the right profile for your existing skirting, give you advice on cutting and installation, and make sure you have all the materials you need to get the job done right. If you have questions about materials, measurements, or anything else related to this project, feel free to reach out to our team for a consultation. We’re here to help you get that perfect, polished look for your space.
Bathroom Niche References:
- Fine Homebuilding. (2022). “Installing Decorative Base Molding: A Step-by-Step Guide.” Fine Homebuilding Magazine.
- Woodwork for Beginners. (2021). “Material Matching for Skirting and Molding: How to Avoid Gaps and Warping.” DIY Woodwork Journal.
- National Association of Home Builders. (2020). “Energy Efficiency and Home Renovations: Baseboard Choices for All Climate Zones.” NAHB Research Center.
- This Old House. (2023). “How to Cut and Install Mitered Corners for Trim Work.” This Old House Guide to Home Improvement.
Foshan Chengshuang Stainless Steel Co., Ltd.
Foshan Chengshuang Stainless Steel Co., Ltd. is one of the most professional skirting board manufacturers and suppliers in China. We are committed to providing high quality customized service and 1 year warranty to global clients. If you’re going to wholesale durable skirting board made in China, welcome to get pricelist and free sample from our factory.
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