Royal Corinthian

Synthetic Stone Columns

RoyalStone™ Synthetic Stone Columns

RoyalStone polymer stone columns

Royal Corinthian manufactures synthetic stone or polymer stone porch columns from a combination of filler, resin, and color pigment, resulting in products that look and feel like stone but are lighter, stronger, and less expensive than natural stone. These offer the greatest advantage over our other columns when pre-finished, stone-like, low-maintenance, robust, and load-bearing columns are desired.

Material Composition And Process

RoyalStone™ synthetic stone columns are offered in 6 standard colors which fully permeate the column. In other words, the stone-like appearance isn’t skin deep; the color pigment is absorbed by every particle of the column. In addition to our standard colors, we are virtually unlimited as to the colors that we can produce.

Typically our columns come in one uniform color; however, we are able to mix in various aggregates to achieve a “dirtier” stone look. The majority of our columns are lightly textured using a sandblasting method but we also offer a smooth finish and even a coral finish where actual coral aggregate is used to create a load-bearing coral column. These columns are roto-cast resulting in a load-bearing yet hollow column.

RoyalStone™ columns typically use calcium carbonate filler, which is fine particles of crushed rock that when mixed with polyester resin solidify or harden to form a robust man-made stone column. Since RoyalStone™ is predominately used as exterior columns, they typically do not require an ASTM E 84 Class A test method for flame spread and smoke density.

However, if a project calls out for polymer stone columns with a Class A rating, we add Alumina Trihydrate “ATH” to the matrix in order for the columns to pass the smoke density portion of the test. Without the ATH, the columns would pass only the flame spread portion of the test. These columns typically weigh from 60 lbs. to 4000 lbs., depending on the size of the column.

This is considered a lightweight alternative when compared to natural and cast stone but if even lesser weights are required, we can substitute lightweight filler which will decrease the weight of the column by a factor of 2. For example, a column weighing 300 lbs. would now weigh 150 lbs. In essence we offer “lightweight stone columns” but can offer “very lightweight stone columns”.

RoyalStone™ Synthetic Stone
Best ApplicationPrefinished Whole Columns
Factory Finish (standard)6 colors, 3 textures
Factory Finish (options)Unlimited custom colors
Price Comparison$$$
Wall Thickness3/8″ to 2″
Weight (sq ft)4 to 30 lbs
WarrantyLimited Lifetime
Loadbearing*When factory assembled
Split/Half ColumnsYes, standard with lap joint
Full ColumnsStandard
Fiberglass contentNone, unless requested
FillerCalcium Carbonate/ATH/Prolite
Fire RatingAvailable: Class A
LEED PointsAvailable

*RoyaLite Plain Square NON-Tapered columns are available as FRP column covers as two halves with a lap-joint or as pultruded whole columns, in some sizes, that are lightweight and loadbearing. The whole columns are advantages when lightweight plain square loadbearing columns are preferred over column covers. The pultruded RoyaLite columns have specs that vary from the chart above. Specs are available upon request.

In addition to the RoyaLite™ FRP column covers described above, we offer RoyaLite™ pultruded square columns that actually come as a whole column and not as column covers. These square columns are only available in plain and can span up to 18’ in height. Pultrusion is the process of pulling a consistent shape through a die or mold essentially, which is why pultruded products cannot have a taper to them like many of our column styles. In addition to the different manufacturing process, the composition of these columns differs from our typical RoyaLite™ columns as well as the thickness.

Product Offering

Our RoyalStone™ porch columns are available in every style and size that we offer. As mentioned previously, we offer 6 standard colors and 3 standard textures. Shaft styles include but are not limited to: Round Tapered Plain, Round Tapered Fluted, Round NON-Tapered Plain, Round Twist Rope, Square NON-Tapered Plain, Square Non-Tapered Fluted, Square NON-Tapered Recessed Panel, and Square Tapered Plain. Depending on the chosen shaft, we offer columns ranging from 6” up to 36” x 30’ tall. We offer a variety of decorative capitals: Roman Corinthian, Scamozzi, Temple of the Winds, Roman Ionic, and others. In addition, we also offer Tuscan, Doric, Attic, and Craftsman capitals and bases. Please see our catalog or pricelist for specific sizes offered.

In this video learn about the 3 types of fiberglass columns offered by Royal Corinthian and why they are the most affordable and superior column material in the market. We compare the price, sound when knocked on, style, size, and plan type availability, fiberglass content, and manufacturing process of each material.

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