About Interior Doors
While exterior doors should be as tight as possible, it sometimes makes sense to purposely allow air flow under interior doors. Proper air flow helps in the distribution of fresh air as part of a home ventilation system. Undercutting the doors by 3/4 inch or so allows fresh air to circulate throughout spaces even when doors are closed.
| Hollow Core |
Solid Wood |
Hollow Core Doors
CSI Division: 081400 | Residential Category: Wood Doors
These lightweight doors are often made from honeycomb cores.
What Makes It A Green Product
- Honeycomb cores should be made from recycled fiber.
Negative Environmental Considerations
- Many hollow core interior doors are made with luan plywood, a tropical wood that is rarely grown or harvested sustainably. To avoid the negative environmental impacts, make sure the manufacturer provides evidence that the doors were harvested from sources that are certified by third-party organizations.
Solid Wood Doors
CSI Division: 081400 | Residential Category: Wood Doors
Naturally rot-resistant woods make good alternatives to wood treated with toxic preservatives.
What Makes It A Green Product
- Wood should come from properly managed forests or be certified by a third-party organization. Certified wood is widely available.
- Recovered and Salvaged wood is widely available and should be used provided all appropriate documentation is presented.
Negative Environmental Considerations
- Solid wood interior doors are often fabricated of old growth softwood from the Pacific Northwest which should be avoided.
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