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1/2 X 3-1/4 MDF #356 BASE

Availability: In stock    SKU: EL320-M
$5.26
Width: 5.875 in in Height: 6 in in Length: 2 in in Wood Species: Alder

To complete your order please fill in the required measurements :




Crown Molding Installation:

Perfect circle crown molding:

How to measure the diameter of the circle ceiling:

 
 
full circle diameter and radius
 
 
  • Determine the middle of the circle
  • stretch your tape measure on the ceiling from edge to edge through the middle point on various directions across the width across the length and diagonally.
  • Make sure you always get the same approximate size.
  • As long as you always go through the middle you should always get the same approximate number. variation of up to 1/2" is normal.
 
 

Inside radius crown molding:

  • How to measure the "Opening and Rise" on a concave / inside radius ISR case:
  • Opening: Place a piece of straight edge stick (It can be a measuring stick or any piece of straight wood) firmly against the wall, Ideally 30"-36" in length. the size of the stick will be measured as the "Opening" (In this case for example 36")
  • Rise: measure the shortest distance between the center of the "opening" and the wall. This distance is the "Rise".(In this case for example 7")
 
 
inside radiusOpening and rise ISR
Inside radius
 
 

Outside radius crown molding:

  • How to measure the "Opening and Rise" on a convex / Outside radius OSR case:
  • Opening: Place a piece of straight edge stick (It can be a measuring stick or any piece of straight wood) firmly against the wall, Ideally 30"-36" in length. the size of the stick will be measured as the "Opening" (In this case for example 36")
  • Rise: Measure the vertical 90 degrees angle distance between the edges of the straight edge to the wall. (In this case for example 5")
  • This technique might require a helping hand if you are doing that in the air against the wall, since you have to balance the straight edge and find the equal rise on both side at the same time.
 
 
outside radiusOpening and rise OSR
outside radius
 
 

Window Casing Installation:

  • Arched top (Eye brow) door and window casing:
  • The Arched top window casing will have two corners at the top left and right of the window. You will only need to order the flexible molding for the top round part of the window.
  • For the arched top window casing we will need the following:
  • Opening: Referred to the diameter of the half circle or to the distance between the two horizontal points where the circle starts.
  • Rise: referred to the radius of the half circle or to the distance between the "opening" and the top of the circle.
  • Length: The length of the flexible piece you will need, Measure along the round top of the window from right to left firmly against the curve.
 
 
Arch top window casingarched top
 
 

Round top door and window casing:

  • The round top window casing will have no corners at the top left and right of the window. You will be able to order the molding in one long piece from right bottom corner to left bottom corner.
  • For the round top window casing we will need the following:
  • Opening: Referred to the diameter of the half circle or to the distance between the two horizontal points where the circle starts.
  • Rise: referred to the radius of the half circle or to the distance between the "opening" and the top of the circle.
  • Length: The length of the flexible piece you will need, Measure along the round top of the window from right to left firmly against the curve. (If you would like to order straight tails, please measure them separately- see below)
  • Straight tails: On this half circle type of window it is recommended to order a minimum of one feet of straight tail continual of the molding, on each side. The straight tails will be molded to each side of the curved piece, creating one integral long piece of molding. This way the seam between the flexible casing material and the wood/MDF casing will be easier to hide.
  • A different and a more preferable way is to measure and order the straight tails all the way to the bottom left and right corners of the windows. Thus not having seams or connection points at all, saving time money and labor on covering and hiding the seams.
 
 
half circle window casingarched top casing
 
 

Full circle window casing:

  • For the full circle installation measure the diameter of the inner circle that will be stretched from one side of the window to another.
  • Double check and measure from different points and make sure your diameter measures have the same results each time.
  • In order to get the most accurate diameter, make sure to stretch the tape measure through the center of the circle on each time you measure.
  • If you don't get the same results, it is because your circle is actually elliptic, and not a perfect circle.
  • Full circle window casing will be produced in two half circle pieces. When installing, cut them in the appropriate points and connect them together.
 
 
diameter and radius
 
 

Oval or elliptic shaped crown molding and window casing:

Different from a perfect circle, any oval or elliptic shape has different segments with different curve values,While the top of the arch has a more moderate curve, the left and right hand sides of the shape will typically have a sharper more strong of a curve. They can not be represented by one radius or one set of "rise" and "opening".

Please create a template from paper or cardboard that will outline the borderline of the curve. Templates can be sent to :

San Diego Molding

1621 Placentia Avenue.

Costa Mesa, Ca, 92627

 
 
Oval Oval Oval
 
 

How to install:

PREPARATION

A. Clean surfaces thoroughly prior to installation.

B. Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.

 
 

INSTALLATION

A. Install in accordance with manufacturer's instructions.
1. Cutting: Material can be cut, fitted, shaped, and sanded with standard woodworking equipment. Carbide tipped fine tooth blades are recommended.

2. Fitting: The center of preformed radius moldings should be positioned and fastened in the center of the curve, then trimmed at both ends.

3. Fastening: The use of construction adhesive or mastic type adhesive glues and pneumatic pin nailing is recommended. Use of tape or clamps may be helpful in securing material in position while adhesives bond.

a. Nails should be kept to a minimum of 3/8" from any edge of moldings Nailing too close to the edge of the molding will push the edge and will create unsightly waves on the finished edge.
b. Nails should be kept to a minimum - no closer than 6" between nails. Nailing too close between nails will also create an uneven finish.
c. Never use staples as a method to fasten or nail material.

 
 

FINISH RECOMMENDATIONS

A. Never paint or stain prior to installation. The installation involves handling and flexing the molding to fit and it might creates cracks on the paint. Watery or transparent paints and stains do not work well. Test all paints and stains for compatibility and desired results.

B. When using latex or water-based paints:
1. Primer coats are not recommended. However, water-based primers such as Min wax Water-Based, Pre-Stain wood conditioner or Kilz, will not affect final finish.
2. Brush and/or spray applications are acceptable.

C. When using Alkyd Enamel or oil-based paints:
1. A solvent-based pre-conditioner such as Min wax Wood Pre-Conditioner is recommended. Additional drying time may be necessary. Alkyd enamel and oil-based paints may not dry properly if an undercoat primer is not used.
2. Brush application is preferable.

D. When using stains:
1. Water-based stains are recommended
2. Apply with brush or rag and wipe off. The stain may be wiped on to enhance grain patterns.
3. A water-based sealant such as Min wax Water Base Wood Conditioner, may be applied to reduce blotching and enhance final finish.

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