How to Install PVC Corner Trim: DIY Tips for Perfect Straight Corners

If you’ve ever looked at the corners of your walls and thought, “That could look neater,” — you’re not alone. Exposed wall edges and worn plaster corners are some of the most common finishing problems in UK homes, especially in high-traffic areas like hallways, kitchens, or staircases. Whether you’re dealing with scuffs, chipped corners, or simply want a cleaner look, one simple upgrade can make a huge difference: PVC corner trim.

In recent years, PVC corner trims in the UK have become a go-to for homeowners, landlords, and DIY enthusiasts alike. They’re affordable, stylish, and incredibly easy to install — even if you’re new to DIY. These trims not only add a sharp, finished edge to your rooms, but also protect vulnerable corners from everyday wear and tear. From rental flats to newly decorated family homes, they’re a smart investment for anyone looking to protect their walls without breaking the bank. But not all corner trims are created equal — and that’s where knowing your options becomes key. Whether you're after a bold modern edge like the Anthracite PVC 90° Corner Trim (RAL 7016), a natural look with wood-effect profiles, or something practical and colourful for wet areas like blue or red waterproof PVC edge protectors, there’s a product tailored for every project.

This guide is here to walk you through the best corner trim options available in the UK, and show you exactly how to install them like a pro. No fluff, no jargon — just real tips you can use to transform your walls, tidy up corners, and give your home a polished, professional look.

Top PVC Corner Trim Options You Can Use at Home

Anthracite PVC 90° Trim – RAL 7016 Finish for Modern Homes

One of the most popular choices among UK homeowners is the Anthracite PVC 90° Corner Trim in RAL 7016. This trim isn’t just about protection — it’s about style. With its sleek, dark grey finish, it’s ideal for modern interiors and pairs beautifully with anthracite windows, doors, and skirting. Whether you're updating a kitchen, hallway, or bathroom, this trim offers a true 90-degree angle that gives corners a sharp, clean look.

• Sizes: From 15mm x 15mm to 70mm x 70mm

• Lengths: Available in 1m and 2.5m options

• Features: UV-stable, moisture-resistant, rigid PVC

• Installation: Fix with adhesive or screws

Waterproof PVC Edge Protectors – Coloured & Versatile for Wet Areas

If you're working on a bathroom, utility room or kitchen splashback, a standard trim may not cut it. That’s where 90° Waterproof PVC Corner Trims come in. Designed specifically for high-moisture environments, these trims protect your walls from water damage while delivering a smooth, hygienic finish.

What makes them even more appealing is the choice of colours — Blue, Green, Red, or Yellow, allowing you to add a pop of personality or match your existing decor. Lightweight, easy to clean, and simple to install, they’re ideal for tiling jobs, panel joins, and plasterboard corners in busy or damp spaces.

Wood Effect, White, and Unequal Trims – Style Meets Practicality

Looking for something that blends into your decor or solves a tricky join? The Wood Effect PVC Corner Trim offers a realistic woodgrain look without the upkeep — perfect for living rooms, staircases, and rental properties where both style and durability matter.

Prefer a cleaner aesthetic? The White UPVC 90° Corner Trim gives a neutral, polished finish that works in any room.

Need to cover awkward corners or offset joins? Try the Unequal PVC Angle Trims available in both 1m and 2.5m lengths, perfect for boxing in pipework or finishing corners with varying surface depths.

Want to browse the full range of profiles and colours? Check out our PVC Wall Corner Protector  Collection.

How to Install PVC Corner Trim Like a Pro (Even If You're a DIY Beginner)

Planning & Measuring: Get Your Corners Straight from the Start

The secret to a flawless PVC corner trim installation starts with proper planning and accurate measuring. First, inspect your wall corners. Are they straight and sharp? Or slightly rounded and uneven (as is often the case in older UK homes)? This will determine whether a rigid 90° trim like the Anthracite PVC 90° Corner Trim is a perfect fit or if an unequal trim would give better coverage.

Use a spirit level to check vertical alignment, then measure the height and width of the corner area you’re covering. Remember, it's better to measure twice and cut once — especially when working with PVC.

Cutting and Fixing: Adhesive vs Screws – What Works Best?

Use a fine-toothed saw or a utility knife for a clean edge. Most trims, including the Wood Effect and White UPVC profiles, are lightweight and easy to cut.

• Adhesive fixing: Ideal for smooth surfaces like painted or tiled walls.

• Screw fixing: Offers better grip in high-traffic areas or damp rooms.

• Self-adhesive options: Fast, no-fuss install — just peel and stick.

Finishing Touches: Smoothing Edges, Matching Colours & Avoiding Gaps

Once installed, press along the trim's edges to secure it. Wipe away any adhesive overflow with a damp cloth. For a seamless finish:

• Use colour-matched silicone or caulk for gaps.

• Paintable trims like the white 2440mm profile allow custom finishes.

• Check your work from different angles to ensure clean lines.

Product Comparison Table

Conclusion

Finishing your home’s corners might seem like a small job — but the impact is huge. Whether you’re protecting wall edges from scuffs, upgrading the look of your interiors, or simply tidying up rough joins, PVC corner trims offer a reliable, affordable, and stylish solution.

Throughout this guide, we’ve covered the top options available in the UK — from the sleek Anthracite PVC 90° Corner Trim for modern homes, to the coloured waterproof trims for bathrooms and kitchens, to the ever-practical unequal trims that solve awkward corner problems in older properties. These products don’t just hide imperfections — they actively protect your walls from daily wear, making them ideal for busy households, rental properties, or anyone who wants a polished finish without the hassle of plastering or expensive carpentry. And the best part? You don’t need to be a professional to fit them. With a few basic tools and a bit of patience, any UK homeowner or DIYer can install corner trim with excellent results. Just remember: measure accurately, choose the right fixings, and take your time with finishing touches.

Ready to transform your corners?

Browse all trims and installation essentials at CornerProtector.co.uk — your UK destination for smart, simple and stylish corner solutions.