Easy Installation - Just measure, cut, glue, caulk, paint.

StyroTrim stucco architectural accents are not only high quality, long-lasting, affordable stucco and cement-coated treatments, they are very easy to install.

Before placing an order, obtain the measurements of the wall, window or door areas where you intend to install the treatments.

All stucco StyroTrim sills, flat trims, deco trims and crown mouldings come in 85” length strips, except for finished-end sills that can be ordered in custom lengths. You will use the strips in varying sizes and may need to cut them down to specific widths. StyroTrim can be cut or mitered easily and fit together to trim out most any opening. When placing your order, you need to indicate how many 85” strips of each trim style you need for your project.

When measuring windows and doors, be sure to account for the width of the trim on all sides. Because the trim should be cut at 45 degrees at each corner, you should measure to the outside finished corners for the trim. For "framed" windows, add together both side heights and top and bottom widths to get the total measurement.

For example, a four-foot wide by three-foot high window with 6" trim on all four sides measures:

2 x (48" + 6" + 6") + 2 x (36" + 6" + 6" ) = 216"
Divide 216" by 85" (piece length) = 2.54 pieces. This window needs three(3) 85" length pieces of trim.

Suppose your window has trim on the sides and the top, with a window sill at the bottom. Since your window sill will typically extend beyond the trim (E) on each side of the window you will need to compensate for these widths when ordering your finished-end sill. The total sill length will be the width of the window, plus two trim widths (W), plus the amount (E) you want to extend beyond the trim on both sides. This will be your finished-end sill piece length.

For example, suppose your window is 60" wide and you want your window sill to extend 6" beyond each side of the 6" wide window trim:

Add the window width 60" + ( 2 x 6" trim widths)+ (2 x 6" extensions each side) = 84" of sill needed.
Simply specify an 84" sill with finished ends when you order.

If you purchased stock sills with finished end returns, please disregard these instructions.

If you purchase 85-inch accent sills, please follow these instructions to achieve a finished return to your wall on each side of the window.

The cuts you make on both ends of your sill for these returns are why you must add extra lengths to your sill measurements. Lay sill flat-side down. At one end of your sill, measure the return depth of the flat side of the sill stick and mark it on the sill face (d). At this point, you will need to cut two miters (an "upside down" V ) in the sill with the point of the V at the place you marked. Each cut must be 45 degrees as shown. By doing this, you will cut two pieces from the sill.

If you purchase 85-inch accent sills, please follow these instructions to achieve a finished return to your wall on each side of the window.

The cuts you make on both ends of your sill for these returns are why you must add extra lengths to your sill measurements. Lay sill flat-side down. At one end of your sill, measure the return depth of the flat side of the sill stick and mark it on the sill face (d). At this point, you will need to cut two miters (an "upside down" V ) in the sill with the point of the V at the place you marked. Each cut must be 45 degrees as shown. By doing this, you will cut two pieces from the sill.

Slide the end piece over to the wedge cut in the sill and assemble using glue, such as 100% clear silicone. Repeat on the opposite side of the sill. Create both returns on the sill first before gluing sill to the wall. You may even use toothpicks or nails to hold the end pieces to the sill while the glue dries. Seams must be "StyroCaulk" filled.

Optional Pre-finished Ends
StyroTrim window sills may also be ordered with finished ends so the above procedure will be unnecessary. Order your sills with finished ends by giving us the sill length (in inches) you need.

StyroTrim window and door arches may also be ordered in every style of trim available. Your arch size and shape is as simple as giving us the inside width and the inside height measurements as directed on the Arches pages. Circles can be made by using 2 arches of equal size.

Here are some basic tools and materials needed to install your new StyroTrim accents:

• Standard (disposable) wood saw  or power saw with masonry blade.
• S-curved bead of clear 100 percent silicone (glue)
• Caulking
• Paint or color coating

Standard StyroTrim treatments will arrive in 85-inch strip lengths. Follow these steps to cut, glue, caulk, and install your treatments: