What is the acceptable tolerance for the thickness of a hollow core flush door?

± 1.2 mm according to the standard tolerances.

What is the minimum required width for the internal wooden stiles and rails?

They should not be less than 50 mm to provide sufficient framing strength and screw-holding capacity for hinges and locks.

Can cellular core doors with particle board faces be used as exterior entrance doors?

No, they are generally recommended only for interior applications due to lower structural strength and vulnerability to weather.

IS 2191

: 2000

wooden flush door shutters (cellular and hollow core type): Part 2 Particle board and hardboard face panels

CurrentSpecializedSpecificationBIMArchitectural · Doors, Windows and Shutter

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This standard specifies the requirements for materials, dimensions, construction, and testing of cellular and hollow core wooden flush doors fitted with particle board or hardboard face panels. It ensures quality control for lightweight interior doors commonly used in residential and commercial buildings.

wooden flush door shutters (cellular and hollow core type): Part 2 Particle board and hardboard face panels

Quick Reference Values

tolerance height width± 5 mm

tolerance thickness± 1.2 mm

minimum width stiles rails50 mm

standard thicknesses25, 30, 35, 40 mm

Practical Notes

Hollow and cellular core doors are lightweight and strictly intended for interior use where heavy impact resistance and security are not primary concerns.

Ensure proper wooden lipping on the edges, as the hollow core is highly susceptible to moisture ingress if exposed.

For areas exposed to higher humidity (like bathrooms), verify that boiling water proof (BWP) grade adhesives are used during manufacturing.