The information comes from: Internet
Published on:2026-08-31
When buyers compare WPC doors, most attention goes to the door leaf: its density, surface finish, color and waterproof performance. In an actual project, however, the door frame is just as important. A frame that does not match the finished wall thickness can create visible gaps, uneven architraves, difficult installation and unnecessary site modification.
For apartments, hotels, villas, hospitals and commercial buildings, wall thickness may range from approximately 100 mm to 300 mm. The correct WPC door frame should cover the finished wall neatly, provide stable fixing points and leave enough tolerance for installation. This guide explains what importers, contractors and project managers should confirm before placing an order.
Before discussing frame size, separate these three dimensions:
A common purchasing mistake is to provide only the opening width and height. The supplier can prepare the leaf and outer frame dimensions, but cannot determine the correct frame depth without the finished wall thickness.
| Finished Wall Thickness | Typical Application | Recommended Approach | Points to Confirm |
|---|---|---|---|
| 100–120 mm | Light partitions, standard interior walls | Standard fixed frame where dimensions are consistent | Plaster or tile allowance and architrave coverage |
| 130–160 mm | Apartments, villas and hotel rooms | Fixed or adjustable WPC frame depending on site tolerance | Finished thickness at the top, middle and bottom |
| 170–200 mm | Thicker masonry walls and service areas | Customized frame depth or a split-frame solution | Joint position, fixing method and visible finish |
| 210–250 mm | Commercial buildings and walls with additional finishes | Project-specific frame structure | Frame stability, packing volume and installation sequence |
| 260–300 mm | Special construction details or very thick walls | Customized extended frame, subject to technical review | Section drawing, reinforcement and site tolerance |
These ranges are a practical starting point rather than a substitute for project drawings. Final frame structure should be confirmed according to the wall material, opening condition, door size, hardware and installation method.
A fixed frame is produced to a specified depth. It is suitable when wall thickness is consistent across the project and the finished dimensions are already known. Its advantages include a clean structure, straightforward installation and predictable material usage.
The limitation is tolerance. If one wall is 145 mm and another is 158 mm, a single fixed frame size may not cover both neatly. Installers may need extra fillers or site finishing, which can reduce the visual quality of the completed doorway.
An adjustable or split-frame system can accommodate a range of wall thicknesses. It is useful for renovation projects, multi-building developments or sites where plaster and tile thickness vary. The exact adjustment range depends on the frame profile, so buyers should request a section drawing and physical sample before mass production.
For very thick walls, “adjustable” does not always mean that one standard profile can cover every dimension. A customized extension or combined structure may still be required.
If the project is still at the structural stage, provide both the current measurement and the expected finish build-up. This gives the door supplier enough information to recommend a suitable tolerance.
The architrave, also called casing or trim, covers the joint between the frame and the wall. Its width must be sufficient to hide normal installation gaps, but it should not interfere with nearby corners, switches, skirting boards or built-in furniture.
For thick or uneven walls, confirm whether the architrave is installed on both sides, how it connects to the frame and whether the same color and surface finish are available. A complete sample corner is more useful than judging the frame and trim as separate pieces.
Send the following information to your WPC door supplier:
For large orders, approve a complete door-set sample before production. The sample should include the leaf, frame, architraves, hinges, lock and finish. A trial installation can reveal measurement or assembly issues that are difficult to see in a drawing alone.
Shenghao supplies WPC interior door solutions for residential and commercial projects. Based on the door schedule and finished wall dimensions, our team can help buyers review frame depth, profile structure, finish, hardware preparation and packing requirements. OEM and ODM options are available for distributors, contractors and project purchasers.
If your project includes walls from 100 mm to 300 mm, send us the opening schedule and section drawings. We will evaluate the suitable WPC door frame solution and prepare a clear quotation for your project.
Contact Shenghao for WPC door and frame specifications: www.shenghaodoors.com