Door Frames, Door Linings & Casings

Door Frames, Door Linings & Casings

A door frame is often overlooked or never acknowledged for the role it plays in holding a door in place. It’s important to know which kind of door you need, and at Howarth, we have a wide selection of door frames and sizes for you to choose from.

A standard door frame size is 6ft 8in, with the door frame size being generally wider than the door opening. Other door frame sizes can come as small as 6ft 6 inches, and as tall as 6ft 8.3 inches.

What is door lining?

A door lining is a frame, usually made of wood, that is used to prevent doors from jamming or sticking and is also used to conceal the brickwork or timber surrounding the door itself. The lining makes the door look more appealing, makes it easier to use, and protects the door from damage. To be able to work out door lining sizes, you will need to measure the height, width, thickness, and depth.

Door lining sizes

The normal thickness for door linings is usually about 1 1/82’’, whereas MDF door linings can fit door sizes for up to 204mm in height and 976mm in width. For door lining opening sizes, it’s important to leave 910mm for a standard door, and 1981mm for cupboard and wardrobe doors because of the better range of sizes available.

For door casing sizes, the most widely used door casing size is 2 ¼ inches in width but can range up to 3 inches. You will also need a door casing gap of 2mm around the sides and the top and a gap of 8mm around the bottom of the floor. Howarth Timber and Building Supplies offer untrenched casing sets which give you the freedom to place the grooves where you want them. This is useful if you are installing doors that are a non-standard size.

For further information and expert advice on door frames, please contact your friendly local Howarth branch.