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Door Casing & Trim

Decorative door casings, architraves, and trim. Elevate standard doorways with handcrafted millwork.

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Door casing and trim details elevate standard doorways into architectural features. NUMBO's millwork collection includes decorative door surrounds, architraves, and trim profiles in stone composite, plaster, and MDF — manufactured in our Foshan facility. Each profile is available in standard and custom dimensions to match your project's architectural style.

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Designed for These Spaces

Villa Interior Villa Interior Hotel Suite Hotel Suite Office Interior Office Interior
16+ Years Manufacturing Experience
4,500 m² Own Factory in Zhongshan
500+ Projects Delivered Worldwide
100% Original Design

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How to Choose Door Casing and Trim

Trim details are the subtle elements that define architectural quality.

1. Profile Style

Simple flat profiles suit contemporary and minimalist interiors. Stepped and layered profiles add depth for traditional and transitional spaces. Fluted casing introduces classical detailing. Choose a profile that complements your baseboard and crown molding style.

2. Width and Proportion

Standard casing width is 2.5-3.5 inches. For grand entries and high-ceiling rooms, 4-6 inch casing creates appropriate scale. The casing width should be proportional to the door height — taller doors need wider casing.

3. Material Selection

Stone composite offers durability and a premium finish for high-traffic areas. Plaster is ideal for painted finishes and seamless integration with walls. MDF provides cost-effective consistency for large projects with many doorways.

Trade Program & Custom Solutions

Are you an interior designer, architect, or procurement professional? NUMBO’s Trade Program offers exclusive trade pricing on bulk orders, priority production scheduling, a dedicated project manager, and custom finish & dimension options through our Custom Program.

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Frequently Asked Questions

What width casing works for standard interior doors?

For standard 80-inch interior doors, 2.5-3.5 inch casing is appropriate. For 96-inch doors or grand entries, 4-5 inch casing maintains proper proportion. The casing should be roughly 1/20 of the door height.

Can trim be customized to match existing moldings?

Yes. Through our Custom Program, we can match existing profile shapes, dimensions, and finishes. Send us a photo and measurements of your existing trim, and we will create matching pieces.

How are stone composite trim pieces installed?

Stone composite trim installs with construction adhesive and finishing nails, similar to wood trim. Joints are filled with color-matched caulk. The material can be cut with standard woodworking tools.