Door casings & jambs · made in our own plant
Flat Casings and Architraves
Flat-backed casing for doors and windows, called architrave in the UK, in primed MDF and finger-jointed pine. Pick a common profile or send your own; we cut it to your lengths and load it with the rest of your order.
In the room
Flat casing around a door
A Craftsman-style door: flat casing legs, a 1×6 head with a 1×2 cap on top, and a flat 1×6 baseboard. The head, cap and baseboard are primed S4S boards.
Flat or L-shaped
Two ways to trim a door
Our door casings with a return leg are L-shaped and wrap the edge of the door frame. Flat casings and architraves have a flat back: they cover the joint between the jamb or lining and the wall, and are fixed with nails or adhesive.
Both come off the same moulding lines. For a laminated core, see D02, our primed LVL flat casing.
Common casing and architrave profiles
US buyers order casing by profile name and size. In the UK, the architrave usually shares its profile with the skirting in the same room. The drawings show common shapes at typical sizes.
US casing
Colonial casing
Stepped ogee and bead details rising to a thick outer edge.
Drawn at 11/16″ × 3‑1/4″ (17.5 × 83 mm)
US casing
Ranch casing
A soft rounded face, also called clamshell casing.
Drawn at 11/16″ × 2‑1/4″ (17.5 × 57 mm)
US casing
Craftsman flat casing
A flat board with crisp edges for Craftsman and modern rooms.
Drawn at 11/16″ × 3‑1/2″ (17.5 × 89 mm)
US casing
Bullnose casing
A flat face with two round edges, often listed as 2RE.
Drawn at 11/16″ × 2‑1/2″ (17.5 × 64 mm)
US casing
Fluted casing
Parallel flutes run along a flat face.
Drawn at 11/16″ × 3‑1/2″ (17.5 × 89 mm)
UK architrave
Torus architrave
A rounded torus edge on a flat face, to match torus skirting.
Drawn at 18 × 69 mm
UK architrave
Ogee architrave
An ogee curve rising towards the outer edge.
Drawn at 18 × 69 mm
UK architrave
Chamfered architrave
A flat face with a chamfered outer edge.
Drawn at 18 × 69 mm
Drawings show common profile types at typical sizes; they are not a catalogue. We make every profile to your drawing or sample, in the size you need.
How it’s made
See how a flat casing is made
Pick a profile and follow the casing through our line step by step, then take it apart to see the MDF core, the gesso coat and the primer.
Drag to turn it
The 3D view is not available in this browser. The steps below describe the same process.
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MDF board is ripped into strips as wide as the casing.
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A moulder shapes the face profile and both edges and sands the strip.
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A thin gesso coat goes on through a die shaped like the section, over the face and both edges.
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The gesso is dried and sanded smooth along the whole length.
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A white primer coat finishes the casing. It is ready for the final paint.
Illustration. The sections are common profile types drawn at typical sizes, not a catalogue; every profile is shown at about the same width, and the coats are drawn thicker than they are.
Materials
Primed MDF or finger-jointed pine
Both come primed white, ready for the final paint. Tell us which one your market expects, or order both in the same container.
Primed MDF
Smooth and stable, with no grain to show through the paint. MDF casing gets a gesso coat and a white primer on our coating line.
Finger-jointed pine
Clear pine blocks, cut free of knots and finger-jointed into long lengths, then moulded and primed white. Real wood for paint-grade work.
Your own profile
Send a drawing, a sample or a photo with the main sizes. We make the profile from it and send you a sample to approve before production.
Common casing sizes in the trade
| Item | Inches (US) | Millimetres |
|---|---|---|
| US casing | ||
| Thickness | 9/16″ – 1‑1/16″ | 14 – 27 mm |
| Width | 1‑9/16″ – 5‑1/2″ | 40 – 140 mm |
| Common sizes | 11/16″ × 2‑1/4″, 11/16″ × 3‑1/4″ | 17.5 × 57, 17.5 × 83 mm |
| Stock lengths | 16 ft or 17 ft; 7 ft for door sets | 4.88 or 5.18 m; 2.13 m |
| UK architrave | ||
| Profile and size | – | matched to the skirting in the same room |
Typical sizes from US and UK trim distributors. We make each profile to your drawing or sample, so treat these as a guide, not as limits.
Base and casing sets: send the skirting, casing and any chair rail profiles together, and we make them as a matching set. Door jambs and door stop can go in the same order.
Ordering
Casing in the same container as the rest of your order
- Send the profiles: a drawing, sample or photo for each one, with the material, lengths and quantity.
- Approve the sample: we send you a sample, and production starts once you approve it.
- Production: the lead time for custom orders is 15–30 days.
- Loading: casings and architraves can share a container with skirting, crown, boards and wall panels. The minimum order is one 20ft container, and it is negotiable; the quantity of each profile follows your order.
We cut every profile to the lengths on your order. The quotation gives any tooling or sample cost and the packing.
Related pages
Profiles for the same rooms
Ask for flat casings
Send the profile drawing or a sample, the material, lengths and quantity, and the skirting profile if the two should match. Add your destination.