Gentek Fairhaven Sound Scallop siding is manufactured from polypropylene with a natural cedar texture and a repeating curved lower edge. Gentek publishes a 6¼-inch single-course exposure for the profile.

PEPA explains that polypropylene siding can be injection-molded to closely reproduce wood shakes and shingles. With scallops, that manufacturing flexibility creates a shape that feels more ornamental than a conventional horizontal siding course.

The challenge is balance. Scallops should highlight architecture that already deserves attention. They should not be used to invent detail where the house has no visual structure to support it.

What Makes Scallops Visually Different?

Most exterior siding emphasizes straight lines. Clapboard and Dutch-lap profiles move horizontally, while board-and-batten siding emphasizes vertical lines. Scallops introduce repeated curves.

Curves naturally attract attention because they contrast with the straight edges of roofs, windows, doors and wall corners. That contrast can soften a façade, but it also increases the profile’s visual strength.

Where Scallop Siding Usually Works Best

Where Scallops Are Often Less Successful

• Across several unrelated rectangles on the same façade
• On every gable of a house with a complex roof
• Beside several other specialty siding profiles
• Against highly varied brick and heavily textured stone at the same time
• On a strongly modern elevation that depends on simple planes and minimal ornament
• In narrow strips where the curved pattern cannot be read clearly
• Where no trim or architectural boundary can finish the material change naturally

Match Scallops to the Architecture

Let Shape or Color Lead—Not Both Everywhere

Scallops already create a strong shape. A dramatic color difference adds a second layer of emphasis.

If the accent area is small and architecturally important, both shape and color contrast may work. On a larger gable, a related color often allows the repeated curve to remain the primary feature.

Use Trim to Contain the Pattern

Scallops need a clear frame. Without one, the repeated curves can appear to run into roof edges, windows or adjacent siding without resolution.

The trim plan should address:

• The horizontal transition below the scallop courses
• Sloped rake trim at the gable edges
• Window or vent surrounds
• Inside and outside corners
• Soffit and fascia relationships
• The change between scallops and horizontal siding

Gentek’s Color Clear Through collection is intended to coordinate selected siding, trim, soffit, fascia and accessory colors. Repeating a consistent trim color can make the scallop accent feel connected to the complete exterior.

Scallops with Brick or Stone

Brick and stone already provide color variation, joints and surface texture. Adding scallops creates another patterned material, so the color relationship should usually remain quiet.

• Pull a secondary color from the masonry rather than its strongest tone.
• Keep the scallop application limited to one clear feature.
• Use consistent trim to separate the materials cleanly.
• Avoid adding a third specialty siding profile unless the architecture clearly requires it.
• View the complete combination from across the street before ordering.

Scallops with Horizontal Siding

Horizontal siding makes a useful visual background because its long lines contrast with the scallops’ repeated curves.

Keep the horizontal siding dominant across the main walls and use scallops where the roof or wall geometry creates a natural boundary. A transition band can separate the profiles and reinforce the architectural line.

The change should not occur midway through an opening or at an arbitrary height. It should relate to the base of a gable, a porch roof or another visible structural division.

Do Not Overdecorate the Accent

Scallop siding, contrasting trim, decorative vents, shutters and multiple accent colors can all be attractive individually. Used together in one small gable, they can compete.

For a cleaner result, choose one primary feature:

• Scallop texture with quiet trim
• A strong scallop color with simple surrounding details
• A decorative gable vent with a closely related scallop color
• Broad traditional trim with a restrained overall palette

Supporting elements should remain secondary. If every detail is emphasized, none of them functions as the focal point.

Installation Quality Is Especially Visible

A repeated curved pattern makes course alignment important. If the courses drift, the inconsistency can become obvious across the gable or around a window.

Gentek states that Fairhaven Sound includes self-aligning nail slots and temperature guidance to support positioning for expansion and contraction. Those product features still depend on installation according to the current instructions.

A quality scallop installation should include:

• A flat, sound substrate
• A continuous water-resistive barrier
• Proper flashing at openings and intersections
• Level reference lines
• Correct panel engagement
• Required expansion and contraction allowances
• Clean perimeter and transition trim

PEPA’s installation resources also direct installers toward correct polymeric-cladding practices and current manufacturer requirements.

Common Scallop-Siding Mistakes

• Using scallops on every gable: Repetition removes hierarchy from the façade.
• Combining several accent colors: The curved profile already provides strong visual interest.
• Placing scallops in narrow leftover spaces: The pattern needs enough area to read clearly.
• Ignoring the house style: Scallops cannot make a plain modern façade historically Victorian.
• Using undersized trim: Weak borders fail to contain a strong pattern.
• Selecting a color from a screen: Physical samples reveal texture and undertone more accurately.
• Treating installation as cosmetic only: Water management, fastening and panel movement remain essential.

A Scallop-Selection Checklist

1. Identify the home’s most important decorative feature.
2. Confirm that scallops support the architecture.
3. Decide whether the curved profile or the color should provide the strongest emphasis.
4. Relate the color to the roof, masonry and main siding.
5. Design the trim and transition details.
6. Resolve windows, vents and other penetrations.
7. Review a physical sample from the street.
8. Confirm current color and profile availability.
9. Require current Gentek installation instructions.