1. Identify Every Application

Begin with a written elevation-by-elevation schedule. Separate horizontal soffit from vertical wall applications because a panel available for soffit use is not automatically approved or appropriate for vertical siding.

If the same material is intended for several applications, document each one separately instead of combining everything into one unexplained quantity.

2. Confirm the Exact Gentek Product and Profile

Review the available Gentek vinyl soffit and vertical siding options before finalizing the material list. Relevant Gentek product families may include Sequoia Select, Oxford, Beaded Premium, and Fairweather, but profiles, colors, ventilation configurations, and approved applications vary.

• Write down the complete product-family name.
• Confirm the panel profile and nominal exposure.
• Specify solid, center-vented, fully vented, or other ventilation configuration.
• Verify that the selected panel is approved for its intended application.
• Record the current item number or supplier description.
• Confirm panel length, pieces per carton, and carton coverage.

Do not transfer specifications from one Gentek family to another. Similar-looking panels can have different dimensions, coverage, ventilation performance, and application limits.

3. Verify Current Specifications

Product literature is periodically revised. Before ordering, compare the current product page, technical documentation, supplier information, and project requirements. Pay special attention to any specification that affects calculations or code compliance.

If two documents show different values, do not average them or select the more convenient number. Ask which specification applies to the exact product being supplied.

4. Complete the Ventilation Calculation

Vented soffit should be selected from a ventilation plan—not from appearance alone. Determine the required net free ventilation area, the amount assigned to the intake side, and the ventilation contribution of the exact soffit panel.

1. Confirm the attic area and applicable ventilation requirement.
2. Determine whether the project qualifies for a balanced ventilation ratio.
3. Calculate the required intake ventilation.
4. Verify the current ventilation rating for the selected panel.
5. Calculate the necessary linear feet or square footage of vented soffit.
6. Check that insulation, framing, blocking, or paint will not obstruct airflow.
7. Coordinate the intake with the exhaust ventilation system.

5. Verify Vertical Siding Restrictions

If a soffit-style panel will be installed vertically on a wall or gable, obtain clear confirmation that the selected product, profile, and color are suitable for vertical siding. Do not assume every solid soffit panel has the same wall-use approval.

• Confirm the panel is approved for vertical wall installation.
• Verify that the selected color is available for that application.
• Identify the required starter, receiver, corner, and transition details.
• Confirm the wall assembly provides the required drainage and water management.
• Check fastening, substrate, and support requirements.
• Document how windows, doors, fixtures, and penetrations will be trimmed.

Dark colors and limited-production colors deserve additional scrutiny. A matching color name does not prove that every profile or accessory is available in that color.

6. Approve Physical Color and Profile Samples

Screen images and printed literature are useful for narrowing choices, but they are not a substitute for physical samples. Review the proposed panel and adjacent materials under daylight and in the actual project environment whenever possible.

• Record the manufacturer’s full color name.
• Identify the product family connected to the sample.
• Compare soffit, fascia, siding, roofing, windows, and gutters together.
• Obtain written owner approval before placing a nonreturnable order.
• Retain the approved sample or photograph it with identifying information.

Customers near Davenport can also ask about viewing products through the Suburban Wholesale showroom .

7. Inspect the Existing Conditions

Measurements alone cannot reveal whether the receiving surfaces are ready. Inspect the structure before the order is finalized, especially on remodeling projects.

• Look for rot, loose framing, water staining, and pest damage.
• Check whether the substrate is flat, sound, and properly aligned.
• Identify framing or support spacing.
• Confirm that ventilation paths remain open from the soffit into the attic.
• Locate electrical boxes, cameras, lights, vents, columns, and other interruptions.
• Determine what existing materials must be removed or repaired.

New soffit can conceal an existing problem, but it cannot correct the underlying source of moisture or structural deterioration.

8. Measure by Area, Direction, and Cut Pattern

Calculate each elevation or soffit run separately. Include depth, length, panel direction, interruptions, and the cuts that will actually be produced from each panel.

A flat waste percentage is not a substitute for a cut plan. Complex hips, deep overhangs, short returns, gable peaks, and divided elevations may create more waste than an open, rectangular installation.

9. Build a Detailed Accessory Schedule

“Matching trim” is not a complete accessory specification. Identify the purpose, profile, color, length, and quantity of every accessory.

• Wall-side and fascia-side receivers
• Inside and outside corner treatments
• Starter components for vertical siding
• Utility or finish trim where required
• Dividers for long or changing panel runs
• Transitions between profiles, colors, or orientations
• Window and door perimeter components
• Mounting blocks for lights, outlets, cameras, and vents
• Compatible fasteners and sealants

Draw unusual intersections before ordering. If the installer cannot describe how a corner, transition, or penetration will terminate, the accessory list is probably incomplete.

10. Coordinate Fascia, Trim Coil, and Gutters

Soffit rarely operates as an isolated material. Coordinate it with the fascia system, custom-bent metal, roof-edge conditions, and rainwater components before finalizing colors or quantities.

Confirm whether gutters will be removed, replaced, or installed after the fascia work. This decision affects labor, staging, trim access, and the risk of damaging finished materials.

11. Review Installation Requirements

The installer should review the current manufacturer instructions before the material package is approved. Installation requirements can affect both material quantities and substrate preparation.

• Required support and maximum unsupported spans
• Fastener type, placement, and corrosion resistance
• Panel expansion and contraction allowances
• Clearance inside receiving channels
• Procedures for spans wider than the standard support condition
• Vertical siding substrate and water-management requirements
• Cold- or hot-weather installation considerations
• Rules for sealing penetrations without blocking movement

Ordering extra panels will not compensate for missing support, incorrect fasteners, or a receiver configuration that prevents normal thermal movement.

12. Confirm Availability, Lead Time, and Return Terms

Before scheduling labor, determine which materials are stocked, transferred, made to order, or subject to minimum quantities. Confirm every component—not just the primary panel.

• Panel availability
• Accessory availability
• Minimum order quantities
• Estimated lead time
• Color or profile discontinuation risk
• Return eligibility and restocking terms
• Policy for special-order or custom materials
• Procedure for shortages or damaged cartons

A panel in stock does not guarantee that its matching receivers, corners, or finish accessories are also immediately available.

13. Plan Delivery, Storage, and Staging

Confirm where the material will be delivered and how it will be protected until installation. Vinyl products should be handled and stored according to the manufacturer’s current instructions.

• Verify site access and unloading space.
• Choose a clean, flat, protected storage location.
• Avoid unsupported stacks or conditions that may distort panels.
• Protect cartons from impact, excessive heat, and jobsite traffic.
• Separate materials by elevation or installation phase.
• Inspect deliveries promptly and document visible damage.

14. Preserve Documentation and Extra Material

Keep a project record containing the final quote, order confirmation, approved color, product literature, installation instructions, warranty information, and delivery documentation.

Consider retaining a reasonable amount of labeled material for future repairs. The useful quantity depends on the project’s size, complexity, color, profile, and expected future availability.

15. Assign Responsibility and Obtain Final Approval

A checklist only works when each decision has an owner. Identify who is responsible for measurements, ventilation calculations, product selection, color approval, installation details, ordering, delivery inspection, and warranty documentation.