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Door Linings
Door lining sets are pre-cut softwood frames used to form internal door openings. Suitable for a range of door sizes, they provide a stable base for installation and finishing.
About Door Lining Sets
Softwood door lining sets are used to create a neat, secure frame for internal doors. They form the opening that the door is hung within, giving you a straight and stable fixing point for hinges, latches, stops and architrave.
A door lining set usually includes the timber sections needed for the head and two sides of the frame, ready to be cut and fitted to suit the doorway. Softwood is a popular choice because it is easy to work with, simple to trim on site and suitable for painting, staining or finishing to match the surrounding interior.
Commonly used in new builds, renovations, extensions and general joinery work, softwood door linings are ideal for fitting internal doors throughout the home or commercial spaces. Whether you are replacing an existing frame or installing a new doorway, they provide a practical and reliable base for a clean, professional door finish.
An internal door lining set creates the timber frame inside a doorway, giving you a straight fixing point for the door, hinges, latch, stops and architrave. It is fitted into the wall opening before the door is hung. Softwood door linings are commonly used for internal doors because they are easy to cut, fix, plane and finish on site.
The difference is the lining depth, which needs to suit the finished wall thickness. A 115mm lining is commonly used for slimmer internal partitions, while a 138mm lining is used for deeper walls. The right size depends on the stud timber, plasterboard, skim, wall finish and any extra boards or tiles being fitted.
A 115mm door lining is usually chosen for standard internal stud walls where the finished wall depth is relatively slim. For example, a wall built with 63mm CLS, plasterboard both sides and skim will often suit the smaller lining size. Always check the finished wall thickness before ordering, as plasterboard type and wall finish can affect the final measurement.
A 138mm door lining is usually used for deeper internal walls, such as partitions built with 89mm CLS, walls with thicker plasterboard, acoustic boards, fire boards, tiles or heavier finishes. It gives more depth to cover the finished wall build-up. If the wall is too deep for a 115mm lining, the 138mm option is normally the better choice.
Measure the full finished wall thickness, including the stud or masonry, plasterboard, skim, plaster, tiles or other wall finishes. The door lining should be deep enough to suit that finished thickness. If you only measure the bare timber frame before plasterboard is fitted, you may order a lining that is too narrow once the wall is complete.
Door lining sizes are often listed by their nominal size, such as 32 x 115mm or 32 x 138mm, but the finished size can be slightly smaller after machining. This is normal for planed softwood products. If the exact depth matters, check the finished size on the product page before ordering, especially when matching an existing wall.
Yes, softwood door linings can usually be trimmed, planed or cut down on site if they are slightly too deep for the wall. This is often easier than trying to make a lining wider if it is too narrow. However, avoid removing too much material, and make sure the lining still gives enough fixing strength for hinges, stops and architrave.
Many internal softwood door lining sets include door stops, but it is worth checking the product details before ordering. Door stops are the narrow timber strips fitted inside the lining to stop the door closing too far. Some sets include loose stops so they can be positioned to suit the door thickness and hanging direction.