Drawer Slides Decoded: How To Choose Between Undermount And Side-Mount

You're in the middle of building your cabinets. Drawer slides aren't the most visible part of the project, but they have a huge impact on how your cabinets feel and function every single day.

Then one day, they stick. They wobble. Or every time you pull out a spoon, they squeak. And suddenly, your morning starts with frustration.

Based on performance and appearance requirements, side-mount slides and undermount slides are the two most common types on the market today.

Side-mount slides attach to the side of the drawer box and the inside wall of the cabinet. They're one of the most common slide types – when you pull open the drawer, the slide extends in the direction you're pulling.

Project managers love them because quality side-mount slides cost far less than undermount slides and are very easy to install.

The trade-off: They take up about an inch of interior width. That's not nothing – especially in narrow drawers.

Where they work best:

• Garage storage, utility rooms, workshop drawers
• Budget apartments or rental units where cost matters more than luxury
• Any drawer that gets opened only a few times a week or less

Undermount slides are hidden beneath the drawer. When you open the drawer, all you see is clean wood and your things – not hardware.

Most undermount slides come with integrated soft-close – a smooth, quiet glide that feels like a luxury hotel stay. As demands for finished high-end delivery have increased, they're gradually replacing side-mount slides. You'll often find them in custom kitchens and bathroom vanities.

What you get:

• Full interior width – no slides taking up space
• Extremely smooth operation
• Post-installation adjustment (very useful for settling floors or shifting walls)

The catch: They cost more.

Where they shine:

• Kitchen drawers opened every day (silverware, utensils, spices)
• Bathroom vanities where every inch of width matters
• Any project where a client asks for that "solid feel"

Let me make it simple:

Don't overthink this.

Drawer slides are important, but they're not magic. A well-built drawer with good side-mount slides will last for years. A poorly built drawer with undermount slides will still fail.

Quality matters more than type. Choose a brand that stands behind its product. And if you're unsure, ask a professional who has installed hundreds of drawer slides – and seen the repair cases that come back.

At REBON, we've already done that homework. So you don't have to.