What are the standard thickness options for hollow core flush doors?

The standard thicknesses are 25, 30, 35, and 40 mm.

What is the acceptable dimensional tolerance for the height and width of the door?

The tolerance on nominal width and height is ± 3 mm.

Are hollow core flush doors recommended for exterior use?

No, they are primarily recommended for internal use. Solid core doors (covered in IS 2202) are preferred for exterior or security applications.

What tests are required to ensure the quality of these doors?

Typical tests include end immersion test, knife test for plywood adhesion, and glue adhesion test.

IS 2191

: 2000

Wooden Flush Door Shutters (Cellular and Hollow Core Type), Part 1: Plywood Face Panels

CurrentFrequently UsedSpecificationBIMArchitectural · Doors, Windows and Shutter

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This standard lays down the requirements regarding material, dimensions, construction, workmanship, and testing of wooden flush door shutters of cellular and hollow core types with plywood face panels.

Wooden Flush Door Shutters (Cellular and Hollow Core Type), Part 1: Plywood Face Panels

Quick Reference Values

standard thickness of shutters25, 30, 35, or 40 mm

tolerance on nominal width and height± 3 mm

tolerance on nominal thickness± 1.2 mm

squareness toleranceNot more than 2 mm for a 500 mm length

moisture content of timber8 to 15 percent (depending on climatic zone)

end immersion test duration24 hours

Practical Notes

Cellular and hollow core doors are lightweight and cost-effective but are generally intended for interior use where security and severe weather resistance are not primary concerns.

Always check the adhesive grade (e.g., BWP or MR) to ensure it matches the environmental exposure of the door's intended location, especially for wet areas like bathrooms.

Ensure the timber frame is properly treated with preservatives and dried to the specified moisture content to prevent warping or delamination.