Compare Gentek and Ply Gem Performance Collection siding using manufacturer specifications, VSI certification, ASTM standards, panel thickness, wind-load ratings, colors, warranties, installation requirements, and local availability.

Standards-Based Vinyl Siding Comparison

Gentek Vinyl Siding vs. Ply Gem Vinyl Siding: A Positive, Expert Comparison

Gentek and Ply Gem both offer extensive exterior building-product choices designed to provide attractive curb appeal, reliable weather performance, and reduced maintenance. Their collections include traditional lap siding, vertical Board and Batten, shakes, shingles, soffit, trim, and coordinating exterior accessories.

A fair comparison must go deeper than the brand names. The correct approach is to compare equivalent product lines using manufacturer specifications, applicable ASTM standards, VSI certification, panel construction, wind-load data, installation requirements, warranty terms, and local availability.

First, Understand What “Ply Gem Siding” Means

Ply Gem is both an exterior-products brand and a larger portfolio of brands. The Ply Gem portfolio includes Mastic, Variform, and the Ply Gem Performance Collection. Because of this structure, “Gentek vs. Ply Gem” can mean two different comparisons.

Gentek vs. Ply Gem Performance Collection: A direct comparison between Gentek siding and Ply Gem-branded products such as Dimensions, Transformations, Performance Board + Batten, and Cedar Dimensions.
Gentek vs. the entire Ply Gem portfolio: A broader comparison involving Ply Gem Performance, Mastic, Variform, insulated siding, windows, stone, trim, shutters, and related exterior products.

This article focuses primarily on Gentek vinyl siding versus the Ply Gem Performance Collection. Mastic should be evaluated separately because it has its own product names, specifications, technologies, and warranties.

The Short Answer

Gentek and Ply Gem both offer dependable siding choices. Gentek Sequoia Select provides extra-heavy .046-inch horizontal construction, a full-roll nailing hem, an Advantage Lock system, deep 3/4-inch projection, and multiple premium colors.

Ply Gem Dimensions offers a premium .044-inch horizontal panel with an oversized locking system, full-length return, folded nail hem, deep wood-grain appearance, and published high-wind performance for qualifying configurations.

Gentek also offers a notably heavy vertical Board and Batten profile, while Ply Gem’s Performance Board + Batten provides a strong .048-inch vertical alternative. Both brands offer specialty shakes and shingles for architectural accents.

The honest conclusion:

Gentek often has the advantage when a contractor wants an extra-heavy horizontal panel, extensive Gentek color coordination, and dependable local inventory. Ply Gem offers an especially broad exterior portfolio with multiple siding tiers, specialty products, windows, stone, trim, shutters, and rainware.

VSI Certification and ASTM Standards

Manufacturer literature describes the features of individual products, but recognized standards provide a stronger technical foundation. The Polymeric Exterior Products Association, formerly known as the Vinyl Siding Institute, owns the VSI Product Certification Program.

According to the association, the program uses independent, accredited certification bodies. Products appearing in its certification directories have demonstrated compliance with the ASTM standard applicable to their product category.

ASTM D3679: Standard Specification for Rigid Polyvinyl Chloride Vinyl Siding. It addresses material, dimensional, weatherability, impact, expansion, shrinkage, surface-distortion, and wind-load requirements.
ASTM D5206: A laboratory test method used to evaluate the negative wind-load resistance of rigid vinyl siding.
ASTM D4756: Standard practice covering the installation of rigid vinyl siding and soffit.
ASTM D7254: Standard specification applicable to polypropylene siding, including qualifying shake and shingle products.
ASTM D7793: Standard specification applicable to insulated vinyl siding.

Meeting an applicable standard does not make every product identical. Panel thickness, formulation, profile geometry, nail-hem construction, locking systems, color technology, and tested design pressure can still differ.

Gentek and Ply Gem at a Glance

Comparison Area	Gentek	Ply Gem Performance
Premium horizontal siding	Sequoia Select, nominal .046-inch thickness	Dimensions, nominal .044-inch thickness
Standard or value siding	Concord, nominal .042-inch thickness	Transformations, nominal .040-inch thickness
Vertical siding	Sequoia Select Board and Batten, currently published at a nominal .050-inch thickness on Gentek’s U.S. product page	Performance Board + Batten, nominal .048-inch thickness
Shake and shingle products	Fairhaven Sound shakes, shingles, and scallops	Cedar Dimensions shakes and shingles
Color coordination	Color Clear Through system across designated Gentek products	Coordinated siding, stone, trim, windows, shutters, accessories, and rainware
Strongest practical advantage	Extra-heavy premium profiles combined with valuable local inventory where available	An exceptionally broad total-exterior product portfolio

Product specifications, colors, profile availability, and warranties may vary by market. Always confirm the exact product and current manufacturer documentation before ordering.

Premium Comparison: Gentek Sequoia Select vs. Ply Gem Dimensions

Sequoia Select and Dimensions are both positioned as premium, low-maintenance horizontal vinyl siding products. They are not identical products, and their nominal thicknesses are different.

Gentek Sequoia Select

Nominal .046-inch horizontal panel thickness
Full-roll nailing hem
Exclusive Advantage Lock system
Full 3/4-inch lap height
Low-gloss cedar-grain texture
Four traditional horizontal profiles
ChromaTrue technology on designated darker colors
Color Clear Through coordination

Ply Gem Dimensions

Nominal .044-inch panel thickness
Oversized panel-locking system
Full-length return
Folded nail hem
Detailed wood-grain pattern
Deep shadow-line appearance
Clear Coat 500 finish on designated cedar colors
Limited lifetime warranty, subject to written terms

Where Sequoia Select Stands Out

Sequoia Select provides a thicker nominal horizontal panel than Dimensions: .046 inch compared with .044 inch. Gentek also offers a full-roll nail hem, a full 3/4-inch lap projection, and several horizontal profile choices within the same premium collection.

Where Ply Gem Dimensions Stands Out

Dimensions combines its .044-inch panel with an oversized locking system, full-length return, and folded nail hem. Ply Gem also publishes an extensive range of standard, deep, and cedar colors, with Clear Coat 500 protection on its designated cedar-color collection.

Positive comparison:

Sequoia Select offers greater nominal panel thickness, while Dimensions uses its own lock, return, and nail-hem engineering to support premium performance. The better choice depends on the desired profile, color, verified wind-load requirements, availability, and contractor experience.

Value Comparison: Gentek Concord vs. Ply Gem Transformations

Gentek Concord and Ply Gem Transformations serve buyers looking for attractive, low-maintenance siding without moving into the highest premium tier. However, their published nominal thicknesses are not the same.

Gentek Concord

Nominal .042-inch thickness
Rolled nailing hem
Clapboard and Dutch-lap profiles
Light rough-sawn texture
Coordinated Gentek trim and accessories
ChromaTrue technology on designated darker colors

Ply Gem Transformations

Nominal .040-inch thickness
Advanced panel-locking system
Engineered nail hem
Double 4-inch, Double 4.5-inch Dutch-lap, and Double 5-inch profiles
Detailed cedar texture
Limited lifetime warranty, subject to written terms

Gentek Concord provides a heavier nominal panel than Ply Gem Transformations. Transformations answers with an affordable product, multiple popular profiles, and a published wind rating for qualifying configurations. Both can be appropriate when matched to the project and installed correctly.

Board and Batten Comparison

Vertical siding has become popular for modern farmhouse designs, gables, additions, and complete exterior transformations. Both manufacturers offer substantial Board and Batten products.

Specification	Gentek Sequoia Select Board and Batten	Ply Gem Performance Board + Batten
Nominal thickness	.050 inch on Gentek’s current U.S. product specifications	.048 inch
Exposure	7 inches	Verify the selected profile in the current specification guide
Finish	Light rough-sawn texture	Freshly painted wood appearance with a deep shadow line
Lock	Product-specific Sequoia Select locking design	Full-size panel-locking system

Gentek currently publishes a heavier nominal Board and Batten profile. Ply Gem nevertheless offers a substantial .048-inch product with its own full-size locking system and broad Performance Collection color palette.

Shake and Shingle Comparison

Gentek Fairhaven Sound and Ply Gem Cedar Dimensions are specialty siding collections designed to reproduce the texture and character of traditional cedar without routine scraping, staining, or painting.

Gentek Fairhaven Sound

Traditional Shake, Hand-Split Shake, Cape Cod Shingle, and Scallop profiles
Integrated panel-locking system
Self-aligning nail slots and temperature installation guide
Self-concealing side tabs
Extended panel lengths on qualifying profiles
Polypropylene construction subject to ASTM D7254 requirements

Ply Gem Cedar Dimensions

Shingle, Half-Round Shingle, and Hand-Split Shake profiles
Published thickness range of .080 to .100 inch
Rough-sawn, hand-tooled cedar appearance
Low-maintenance polymeric construction
Multiple standard and premium colors
Product-specific installation and warranty documents

These specialty products should be compared by material category and exact profile—not by applying conventional horizontal vinyl siding thickness rules to molded shake panels.

Understanding Published Wind Ratings

Gentek states that Sequoia Select has been tested for negative wind-load resistance under ASTM D5206 and meets or exceeds the applicable industry standard.

Ply Gem states that qualifying Dimensions configurations withstand winds up to 233 mph. Ply Gem also advertises Transformations as resisting winds up to 129 mph. These figures should be interpreted through the complete manufacturer specification guide.

A wind-speed claim is not the same thing as a universal field-performance guarantee. Wind-speed conversions may be based on a specific design pressure, building height, exposure category, test assembly, and fastener schedule.

Before comparing wind claims, verify:

The exact product and panel profile
The tested design pressure in pounds per square foot
The wind-speed conversion assumptions
The approved substrate
The fastener type, spacing, and penetration
Building height and exposure category
Field, edge, and corner-zone requirements
Applicable local building codes

The specification guide and code-required design pressure are more technically useful than the largest wind-speed number printed in marketing material.

Thickness Matters, but It Is Not Everything

Panel thickness is a valuable comparison point. A heavier panel can provide greater rigidity, feel more substantial during installation, and help create straighter courses over a properly prepared wall.

Total siding performance also depends on:

Profile shape and projection
Panel-lock design
Nail-hem construction
Material formulation
Fastener spacing and penetration
Substrate flatness
Thermal movement allowances
Flashing and moisture-management details

A correctly installed .040-inch or .044-inch panel can outperform an incorrectly installed .046-inch panel. Product selection and installation quality must be evaluated together.

Installation Standards Remain Decisive

Vinyl siding expands and contracts as temperatures change. Panels must be securely hung while remaining free to move. Fasteners driven too tightly, insufficient clearance inside receiving channels, poor wall preparation, and incorrect panel engagement can result in buckling, waviness, loose courses, or water-management problems.

ASTM D4756 provides an industry-recognized installation practice. Each manufacturer’s instructions then establish the product-specific requirements.

Prepare a flat and structurally sound substrate.
Install the required water-resistive barrier and flashing.
Use the approved fastener type and length.
Position fasteners correctly within the nail slots.
Do not drive fasteners tightly against the nail hem.
Provide the required clearance inside trim channels.
Fully engage panel locks without stretching panels upward.
Follow temperature-specific overlap requirements.
Use the required fastening schedule for high-wind applications.

Neither Gentek nor Ply Gem can compensate for improper fastening, poor flashing, or an uneven substrate. Installer training and workmanship remain critical.

Comparing Warranty Coverage

Gentek states that Sequoia Select is backed by a lifetime limited, non-prorated, transferable warranty with hail protection and lifetime fade coverage, subject to its written terms.

Ply Gem describes Dimensions, Transformations, Performance Board + Batten, and other qualifying Performance Collection products as carrying limited lifetime warranty protection. The exact coverage is controlled by the current written warranty.

Before selecting either brand, review:

Original-owner qualifications
Transferability
Proration after transfer
Definitions of excessive fading
Hail coverage and limitations
Labor, freight, removal, and disposal exclusions
Registration and claim procedures
Improper-installation exclusions

Do not rank warranties using the word “lifetime” alone. Compare the actual remedies, exclusions, transfer provisions, and owner obligations.

Local Availability Can Change the Best Choice

Ply Gem’s greatest strategic strength is the breadth of its total exterior portfolio. Gentek’s strongest local advantage may be immediate product availability through a well-stocked distributor.

For Quad Cities contractors, Gentek products stocked by Suburban Wholesale & Supply can help:

Reduce special-order lead times
Keep installation crews working
Replace damaged or mismeasured pieces quickly
Coordinate panels, trim, soffit, and accessories
Reduce excess jobsite inventory
Protect contractor cash flow
Provide access to knowledgeable local support

A product with impressive specifications can still become a poor business choice if replacement material is difficult to obtain. Availability, delivery, and distributor knowledge belong in the final comparison.

Which Brand Is the Better Fit?

Gentek May Be the Better Fit When:

You want Sequoia Select’s .046-inch horizontal construction
You want Gentek’s heavier Board and Batten profile
You prefer a Gentek-exclusive color or texture
Color Clear Through coordination is important
The required products are stocked locally
Fast delivery and local technical support matter

Ply Gem May Be the Better Fit When:

You prefer a Ply Gem Dimensions color or profile
Clear Coat 500 cedar colors fit the design
You want products across a broad total-exterior portfolio
Ply Gem windows, stone, trim, or shutters are also specified
Your contractor regularly installs the selected system
The required materials are readily available locally

Final Gentek vs. Ply Gem Comparison

Gentek and Ply Gem both offer credible siding products. Gentek provides an especially compelling premium option through .046-inch Sequoia Select, a heavy Board and Batten profile, coordinated exterior colors, and strong local distribution where available.

Ply Gem answers with its Dimensions premium siding, Performance Board + Batten, Transformations value siding, Cedar Dimensions specialty products, and an exceptionally broad portfolio of coordinated exterior materials.

The strongest decision comes from comparing equivalent products, confirming current VSI certification, reviewing ASTM-based performance data, examining physical samples, reading the written warranties, and selecting an installer who follows manufacturer specifications and industry-approved installation practices.

Compare Gentek Siding With a Local Expert

Suburban Wholesale & Supply helps Quad Cities contractors, builders, and homeowners evaluate vinyl siding based on the complete project—not merely the brand name. Our team can help compare panel thickness, profiles, colors, accessories, manufacturer specifications, installation requirements, and local product availability.

Contact our Davenport team to determine which Gentek siding product best fits your design, performance requirements, budget, and construction schedule.

Technical References

Product offerings, colors, profiles, certification status, wind ratings, and warranty terms can change. Verify current information using manufacturer specification guides, current VSI certification listings, written warranties, and applicable building codes before ordering or installing siding. Published wind speeds depend on specific test configurations and should not be treated as universal storm-damage guarantees.

Gentek vs. Ply Gem Vinyl Siding | Expert Comparison