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Curved Moulding

Curved window casing

Imagine, an architectural molding that flexes to fit radiuscontours and shapes. This hand-molded, hard yet flexible,

high-density space age polymer resin can do exactly that.

Whether a job calls for a unique style or optimum consistency, flexible polyurethane moulding is the right choice. It can turn an ordinary room into a space that’s memorable and make architectural challenges easy.

In many instances flexible moulding is a better choice than wood. It offers the grains and beauty of wood but will not rot, swell or deteriorate over time. It is an ideal solution for indoor and outdoor use.

Cost Effectiveness
Flexible moulding is cheaper and quicker to produce than comparable radius wood moulding.  The cost is generally 70 percent less than machined wood millwork.

All Flex Trim products are paint grade and many can be stained. Our molds pick up the grain of the original wood so that our product exactly matches your sample.

We have thousands of profiles. Send us a sketch of your application and a picture or drawing of the mould (or the thickness and width) you want to match, Email.
We will then send you a list of profiles to choose from.

If you are bending around a wall our mouldings will flex to the wall. If you are bending around a window or door then our moulding will be pre-bent to your size and be flexible to exactly fit to your opening.

Standard Flex is a unique polymer resin blend and is the ideal solution for most standard flexible moulding applications. Although it is less expensive than ZzzzFLEX, Flex Trim still exceeds the performance of our competitors' high end products.
ZzzxFLex: No other flexible moulding on the market is stronger, more durable of stains better than ZzzzFLEX. ZzzzFLEX is an elastomer composite developed for the most demanding and complex radius applications. It offers flexibility that is unsurpassed by any other flexible moulding and is the ideal solution for cold weather climates because it is more pliable. Use ZzzzFLEX for small intricate patterns and tight curvatures, or when only the best will do.

Ordering Tips

1. Ordering Straight Pieces versus Having the Moulding Pre-Bent By Carter Millwork

One of the most common questions that we hear is "will a straight piece work for a curved application?" In general, the amount of flexibility in the moulding (i.e., whether a straight piece can be used) is determined by the following:

Application – Here are some general guidelines that can be used:

1. Base – Typically installed with the back of the moulding to the wall so a standard straight piece can be used. The moulding will need to be pre-bent if it is a very tight radius application or if used on the ceiling as part of a crown assembly.

2. Chair Rail – Same comment as "Base."

3. Crown – Most crown moulding must be pre-bent but this depends on both the size of the crown itself and its application. See "Ordering Crown" section below for more information.

4. Jamb – A straight piece can normally be used.

5. Small Profiles (Corner, Shoe, Cove, Base Cap, Quarter Round, etc) – These items are generally very flexible and only require pre-bending when used on a tight radius application.

6. Panel Mould - A straight piece can be used along a curved wall but the moulding may need to be pre-bent for other applications. Contact our customer service department for clarification.

7. S4S (Flat Stock) – Depends on size of the piece and the application. When used as a base, jamb or jamb extension, a straight piece will work. If used as casing, the part must be pre-bent. Contact our customer service department for clarification. 

8. Brick Mould – Depends on how the moulding is being used (if casing, generally needs to be pre-bent).

9. Casing - Depends on the thickness and width of the profile (see below) and the radius of the curve. See "Ordering Casing" section below for more information.
  • Profile Size

    › You can generally compare the flexibility of a piece of polyurethane moulding to a piece of rubber – the thicker and wider the piece, the harder it is to bend and vice versa. 
    › For a small piece of moulding (like a shoe mould), the piece will bend very easily and a straight piece will work for most applications. 
    › For a larger piece of moulding (like a base or casing), the moulding will bend easily in the direction of the thinner dimension (like base on a curved wall) but will be more difficult to bend in the direction of the wider dimension (like casing over an arched doorway).
  • Shape (Half Round, Arch, Elliptical, etc.) 

    › Straight pieces usually can only be used for larger true radius arches but the ability to use a straight piece is determined by how large the radius is versus the width of the profile. For example, for a 2 ¼" casing, a straight piece will work if the radius is greater than 72." 
    › Half rounds, ovals, and ellipticals will always need to be pre-bent, unless it is a very small profile. Please see below information under "Ordering Casing" for more detail.

2. Key Information Needed When Placing an Order
The following information is necessary in order to process your order properly:

  1. Profile Name - In order to insure the best possible match, it is ideal if you can provide information detailing:
    a. The company that supplied the moulding that you are trying to match.
    b. Whether it is MDF, finger joint, or clear
    c. The species of wood that is being matched (pine, oak, etc.).
    **In the case of any uncertainty, you can always fax our office a tracing of the profile in order for us to ensure that our moulding matches exactly.
  2. Application – We need to know how the moulding is being used (half round, arch, elliptical, curved wall, etc).
  3. Dimensions – See below for details on how to measure the proper dimensions for each type of application.
  4. Length of Material – Our standard mould length is 12’. Shorter lengths can be custom made but it may be less expensive to order "stock profiles/items" in the standard 12’ length.
  5. Any Special Order Requirements – Examples of this would be:
    a. Reversing the orientation of the moulding
    b. Using casing on the ceiling as an accent for crown moulding
3. Ordering Casing
  • Casing is generally used around windows, doors, and cased openings. However, it can also be used on the ceiling as an accent for crown moulding, as rake mould, as panel mould, etc. Please specify if you are using a casing profile in a non-standard application so that we can ensure to supply the correct item.
  • Casing is generally bent with the thick edge to the outside of the radius, but sometimes customers choose to install it "backwards" (thick edge to the inside). You will find this frequently with casing as panel moulds, rakes and on the ceiling. Please specify clearly if the moulding needs to be reversed.
  • We are always happy to help you with any specification questions before you enter your order.
Here are some commonly requested configurations and typical information we need for production:

4. Selecting a Half-Round
  • The sizes for half rounds are based on the DIAMETER (2x the radius) of the inside jamb width. For example, a "2/0" half round will have a diameter of approximately 24". For a true half circle (half round) part, the radius (or rise) will be half of the diameter. 
    Material Length Required for Half Round (in feet) = 
    Diameter/2 (Radius) + Casing width x Pi (3.146) / 12
5. Ordering an Arc or Eyebrow
Material Length Required for Arc (in feet) = 
Rise x 3 + Width (both in inches) / 12
For arched door entries/openings,
the key measurements we need are:

1) Width of opening (inside jamb)
2) Rise (Do not include leg height)


6. Ordering an Elliptical or an Oval
Casing for elliptical and oval applications must be pre-bent at our factory.
**Templates are normally required but we keep many standard templates in stock. Please specify the manufacturer of the window or door unit and the model number and we can confirm whether we have the template in stock

NOTE: There are limitations regarding how tight a radius can be created (a general "rule of thumb" is approximately 3x the width of the profile) so please contact our sales department if you have a tight radius application.

7. Ordering Crown
  • Crown moulding is generally the most complicated product to order due to how it is mounted. Crown moulding normally needs to be pre-bent during production so please specify the following when placing an order:
    1. Whether it is a Convex (Outside Radius or "OSR") or Concave (Inside Radius or "ISR") application – see below pictures. IMPORTANT: Please specify clearly if the crown is being used for a dormer application or a Tudor style (ski slope) roof.
    2. How is the crown being installed? Identify the top (the part against the ceiling) and the bottom (the part against the wall) of the profile.
    3. The radius of the wall and/or ceiling – please use the below diagrams if you are not sure how to calculate the radius.

    Calculating the radius
    -If it is a true radius application, the radius can be determined by providing the WIDTH and RISE (similar to an arc). Please provide the “A,” “B,” and “C” dimensions (as shown here) and we can calculate the radius.

    *A template may be required if there are multiple radii.
  • Another important point – If you are using crown backer (ceiling plate and/or wall plate), please provide a drawing identifying what goes where.
    ***Remember that the ceiling plate must be pre-bent while the wall plate uses straight pieces

8. Ordering Base & Chair Rail
  • Base and chair rail profiles are typically installed with the back of the moulding to the wall, so a standard straight piece is normally used unless it is a very tight radius (might need to be pre-bent). Please specify length of material required (12’ is our standard length), the profile name, and the species of wood that is being matched.

9. Ordering S4S / Jamb
  • Please clearly specify how the product is being installed (as casing, amb, or as base, etc.) so that we can determine whether to pre-bend the moulding or not. We stock most standard dimensions (1x4, 1x6, etc. in 8’ and 12’ lengths) but custom sizes are available with no set up charge. We also have molds for "1x product" with "wood grain" (similar to a Cedar texture) that can be used for interior or exterior applications. Please specify the width, thickness, length of material required, and whether wood grain is required.
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