Hollow core vs solid core wood doors

What exactly distinguishes a hollow core from a solid core wooden door? I understand that the former would be, well, more hollow, but at what point would a solid door become 'hollow' in terms of wood matter or density?

Asked by Cheryl on 7th Jul 2022
Expert Trade Answers
"This one has a sting in the tail , a wood pulp honeycomb same as bees and wasps make mostly air but not ' hollow ' . Rigid and lightweight core known often as egg box ' doors is the answer.
Solid cores can be either a composite of chipboard framed with outer edge timber or from all wood strip and block off cuts glued together .
All have a laminate printed or real wood veneer outer layer and matching timber foredge side trims to give the appearance of solid hardwood , but less expensive ."
Answered on 7th Jul 2022 - Member since Mar 2019 - report
"Hollow core doors are what they say, basically very light weight, inside the door is a Honey Comb shape made of cardboard/hardboard, these doors have a Lock Block which is a piece of timber in the middle so you can fit a lock and handle. They are cheaper than solid doors too.
Solid doors are same again Solid, they would normally be a fire door FD 30/60 that’s the amount of minutes they are fire rated too. Hope that helps."
Answered on 7th Jul 2022 - Member since Jun 2020 - report
"Hollow core aswell as obviously being hollow offer less insulation, both sound and temperature, aswell as feeling cheap when opening and shutting. Solid core doors offer higher properties of insulation, aswell ad feeling and looking more premium. Hollow core doors are basically cardboard inside, whereas solid core doors are wood, much nicer in all respects tbh"
Answered on 22nd Jan 2026 - Member since Jan 2026 - report
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