Solid Core vs. Hollow Core Interior Doors: Why It Matters More Than You Think

Interior doors are one of the most deferred upgrades in a Toronto home – and one of the most impactful when they’re finally done. Most homes have hollow core doors, installed during construction because they’re inexpensive and light. Most homeowners who replace them with solid core doors immediately notice the difference and wish they’d done it years earlier.

Here’s why.

What’s Actually Inside

Hollow Core

A hollow core door is a wood veneer or moulded skin over a frame of wood rails and stiles, with a cardboard honeycomb or similar material filling the interior. It weighs roughly 15 to 25 pounds. It sounds hollow when you knock on it because it is.

Solid Core

A solid core door is a wood veneer or moulded skin over a core of engineered wood composite – essentially a dense, compressed wood product. It weighs 50 to 80 pounds. It sounds and feels like a substantial door when you open and close it. Solid wood doors (not solid core – actual lumber throughout) are heavier still and are typically used for exterior doors.

Sound Transmission

This is the primary reason people upgrade to solid core doors, and the difference is significant. A hollow core door has an STC (Sound Transmission Class) rating of around 25 to 28 – meaning it blocks very little sound. A solid core door has an STC rating of around 33 to 38. For a home office, a bedroom, a music room, or any space where sound privacy matters, this is a meaningful real-world difference.

It’s not a complete soundproofing solution – sound also travels through walls, floors, and the gap under the door – but it’s the most accessible single upgrade for bedroom and office privacy.

Feel and Longevity

Solid core doors simply feel better – the weight gives a satisfying resistance when opening and a solid close rather than a light snap. They’re also more resistant to warping over time, which matters in Toronto where humidity cycles between very dry winters and humid summers. Hollow core doors warp fairly readily; solid core doors hold their shape much better.

Hardware

Heavier doors need hinges and latches rated for the weight. When upgrading to solid core doors, it’s worth investing in proper hardware – three hinges per door rather than two, quality mortise latches, and lever or knob hardware that suits the door weight. This is included in our door installations.

When the Upgrade Is Most Worth It

• Primary bedroom – privacy and sound separation from the rest of the house
• Home office – reduces sound intrusion during calls and focused work
• Basement stair door – significantly reduces sound transmission between floors
• Laundry room – contains appliance noise
• Bathroom – privacy and dignity

Living room and kitchen doors (where they exist) benefit less from solid core, since these rooms are generally open to the rest of the house and the door is rarely closed.

The Cost

Solid core doors cost roughly two to three times what hollow core doors cost and the installation cost is similar. For most homeowners, the upgrade is worth it in bedrooms and the home office, and is optional elsewhere.

Ready to Talk?

If you have questions about your home – or you’re ready to get started – call us at 647-427-7366 or request a quote at thehandyforce.com. We serve East York, North York, and the surrounding Toronto neighbourhoods.

– The HandyForce Team