A door lining is the timber frame fitted inside an internal door opening, normally with separate loose door stops. “Door frame” is the broader everyday term. A door casing usually has the stop formed or rebated into the frame itself.
A door lining uses separate door stops
Our Softwood Door Lining Kit contains two legs, a head and loose stops. You fit the lining first, hang the door, then position the stops so the closed door sits neatly against them.
A door casing normally has the stop built into the frame
UK timber merchants commonly distinguish a casing from a lining by the stop: a casing is usually rebated or machined so the stop is integral, while a lining uses a separate stop. In everyday conversation, customers and trades often use “frame”, “lining” and “casing” more loosely.
An internal door frame kit search usually means the same buying job
If you need the timber surround for a normal internal door, a lining kit is usually what you are looking for. The important choices are the door width and the finished wall depth rather than the terminology on the packet.
Choose the depth from the finished wall
Measure across the complete finished wall where the lining will sit. Our Door Lining Sizes guide covers the stocked depths and what to do when the wall falls between two sizes.
Firecheck linings use the same basic layout with a seal groove
Our Redwood Fire Door Lining Set also uses loose stops, with the lining machined to take a compatible intumescent strip or smoke seal.
