null

Door Frames, Door Linings & Casings

Whether you’re looking for door frames, door linings or door casings, we have a wide selection of size and colour options to complement most door styles. Our useful kits include everything you need to build a top hung internal door system, and they can be used with a variety of internal wooden doors.

Filters

Check local branch stock

  • 382_38_x_125_Redwood_Door_Casing_Set.jpg.jpeg

    Redwood Door Casing 2ft 6in PEFC 38 x 125mm (Finished Size 33x119mm)

    PEFC certified redwood door casing for 2ft 6in internal doors with a smooth finish. Buy online today.
  • 370_38_x_115_Redwood_Door_Casing_Set.jpg.jpeg

    Redwood Door Casing 2ft 9in PEFC 38 x 115mm (Finished Size 33x108mm)

    PEFC certified redwood door casing for 2ft 9in internal doors with a quality finish. Buy online today.
  • 382_38_x_125_Redwood_Door_Casing_Set.jpg.jpeg

    Redwood Door Casing 2ft 9in PEFC 38 x 125mm (Finished Size 33x119mm)

    PEFC certified redwood door casing for 2ft 9in internal doors with a quality planed finish. Buy online today.
  • 388_50_x_115_Fire_Check_Door_Casing.jpg.jpeg

    Redwood Firecheck Door Casing PEFC 50 x 115mm (Finished Size 44x108mm)

    PEFC certified redwood firecheck door casing 50 x 115mm for fire door installations. Buy online today.
  • 388_50_x_115_Fire_Check_Door_Casing.jpg.jpeg

    Redwood Firecheck Door Casing PEFC 50 x 125mm (Finished Size 44x120mm)

    PEFC certified redwood firecheck door casing 50 x 125mm for fire rated internal door installations. Buy online today.
  • 392_50_x_150_Fire_Check_Door_Casing.jpg.jpeg

    Redwood Firecheck Door Casing PEFC 50 x 150mm (Finished Size 44x144mm)

    PEFC certified redwood firecheck door casing 50 x 150mm for FD rated door frames. Buy online today.
  • 063_32_x_175_Redwood_PAR.jpg.jpeg 384_38_x_140_Redwood_Door_Casing_Set.jpg.jpeg

    Redwood Lining Head 27 x 154 x 2002mm

    Redwood door lining head 27 x 154 x 2002mm for internal door frame construction. Buy online today.
  • 063_32_x_175_Redwood_PAR.jpg.jpeg 362.5_32_x_175_Door_Linings_Set_No_Stops.jpg.jpeg

    Redwood Lining Head 27 x 154 x 686mm

    Redwood door lining head 27 x 154 x 686mm for premium internal door frame installations. Buy online today.
  • 063_32_x_175_Redwood_PAR.jpg.jpeg 362.5_32_x_175_Door_Linings_Set_No_Stops.jpg.jpeg

    Redwood Lining Head 27 x 154 x 762mm

    Redwood door lining head 27 x 154 x 762mm for quality internal joinery applications. Buy online today.
  • 063_32_x_175_Redwood_PAR.jpg.jpeg 362.5_32_x_175_Door_Linings_Set_No_Stops.jpg.jpeg

    Redwood Lining Head 27 x 154 x 838mm

    Redwood door lining head 27 x 154 x 838mm with a smooth timber finish. Buy online today.
  • 063_32_x_175_Redwood_PAR.jpg.jpeg 362_32_x_140_Door_Linings_Set_No_Stops.jpg.jpeg

    Redwood Lining Leg 27 x 154 x 2050mm

    Redwood door lining leg 27 x 154 x 2050mm for durable internal door frame installations. Buy online today.

  • Softwood Door Double Lining Kit Excluding Stop 32 x 100mm

    Softwood double door lining kit excluding stop 32 x 100mm for internal double door installations. Buy online today.

  • Softwood Door Lining Kit Reverse Head Excluding Stop 32 x 100mm

    Softwood reverse head door lining kit excluding stop 32 x 100mm for internal door installations. Buy online today.

  • Softwood Door Lining Kit Reverse Head Excluding Stop 32 x 115mm

    Softwood reverse head door lining kit excluding stop 32 x 115mm for internal door frames. Buy online today.

  • Softwood Primed Door Casing 32 x 100 x 602mm

    Primed softwood door casing 32 x 100 x 602mm with a smooth paint ready finish for internal doors. Buy online today.

  • Softwood Primed Door Casing 32 x 100 x 626mm

    Primed softwood door casing 32 x 100 x 626mm ready for painting and internal door installations. Buy online today.

  • Softwood Primed Door Casing 32 x 100 x 762mm

    Primed softwood door casing 32 x 100 x 762mm for internal door frames and joinery projects. Buy online today.

  • Softwood Primed Door Casing 32 x 100 x 862mm

    Primed softwood door casing 32 x 100 x 862mm with a factory prepared finish ready for decorating. Buy online today.

  • Softwood Rebated Door Casing 38 x 115mm 726mm Metric

    Softwood rebated door casing 38 x 115mm in a 726mm metric length for internal doors. Buy online today.

  • Softwood Rebated Door Casing 38 x 115mm 826mm Metric

    Softwood rebated door casing 38 x 115mm in an 826mm metric length for internal doors. Buy online today.
  • 12IC0204025.jpg.jpeg

    Timber Internal Door Casing Firecheck PEFC 50 x 150mm

    This Firecheck Timber Casing 50mm x 150mm is compatible with fire doors to offer protection in the case of a fire. Manufactured from Redwood, this timber door casing is also attractive and long lasting.
  • 12IC0202030.jpg.jpeg

    Timber Redwood Door Casing Untrenched Firecheck 63 x 100mm

    Redwood untrenched firecheck door casing 63 x 100mm for fire rated door installations. Buy online today.
  • 12IC0202015.jpg.jpeg

    Timber Redwood Door Casing Untrenched Firecheck 63 x 115mm

    This Timber Redwood makes an attractive door casing for internal applications. This door casing is untrenched.
  • 12IC0202020.jpg.jpeg

    Timber Redwood Door Casing Untrenched Firecheck 63 x 140mm

    This Timber Redwood makes an attractive door casing for internal applications. This door casing is untrenched.

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.

Frequently Asked Questions

Do I need to have an internal door frame, door lining, or both?
They serve different purposes, so when installing a new or replacement internal door that looks neat and opens and closes smoothly, you’ll need to have both. Internal door linings hide the gap between the door and the wall for a neat finish and prevent the door from sticking when opened and closed. Wooden door frames are the door’s supporting framework, so they attach to the door itself and hold it upright.