Contractor Material-Ordering Guide

How to Order a Complete Gentek Metal Exterior Without Missing the Details

A siding-only material list is not a complete exterior order. Aluminum or steel panels may cover most of the wall, but the crew cannot finish the project without corners, starter components, trim, soffit, fascia, fasteners, rainware, and properly planned transitions.

One missing accessory can stop an otherwise productive crew. The risk becomes greater when the material is a special-order color, the jobsite is outside the immediate Quad Cities, or the crew discovers the problem after the existing exterior has been removed.

The solution is a system-based takeoff that follows the building from the wall surface through every opening, corner, roofline, transition, and water- management component.

Step 1: Identify the Exact Cladding Product

Do not begin the order with a description such as “white aluminum siding” or “dark steel siding.” Record the complete product identity.

Confirm:

• Manufacturer
• Product line
• Profile and exposure
• Horizontal or vertical orientation
• Smooth or textured surface
• Color name and product code
• Panel length and carton coverage
• Current specifications and installation instructions
• Written warranty

For aluminum projects, compare Gentek Deluxe Aluminum Siding with Woodgrain Series 2000. Deluxe offers smooth Double 4-inch and 8-inch single profiles, while Woodgrain Series 2000 provides a textured Double 4-inch clapboard.

For steel projects, review the full Gentek steel siding collection rather than assuming every steel product uses the same gauge, profile, coating, accessories, or warranty.

Gentek publishes a product directory and individual product literature covering its siding, soffit, and metal offerings.^[1] Confirm the exact current documents for the selected line.

Step 2: Measure the Wall Area

Record each elevation separately. Do not rely only on one whole-house square count. Elevation measurements make it easier to plan panel distribution, cuts, waste, color changes, and delivery staging.

Measure:

• Wall length and height
• Gable width and rise
• Dormers and projections
• Porches, additions, and bump-outs
• Window and door openings
• Areas using a second siding profile or material
• Small sections where short cutoffs may be usable

Deduct openings carefully. Labor around windows and doors increases even when those openings reduce the net siding area. Excessive deductions can leave the crew short after cuts and waste are considered.

Step 3: Apply a Realistic Waste Factor

Waste is not one universal percentage. It depends on the profile, panel length, wall dimensions, gables, openings, seam layout, damage risk, crew experience, and whether usable cutoffs can move to another area.

Increase the waste allowance when the project includes:

• Multiple small walls
• Steep or irregular gables
• Numerous windows and doors
• Complex roof-to-wall intersections
• Mixed siding profiles
• Special seam-placement requirements
• Limited ability to use short pieces
• Material vulnerable to jobsite handling damage

Do not inflate waste merely to protect a careless takeoff. Explain the assumptions and use a cut plan when the material cost or lead time justifies the additional work.

Step 4: Count Every Corner and Transition

Measure inside corners, outside corners, material changes, wall-plane changes, roof intersections, and terminations. Record the height or length of each condition rather than counting only the number of corners.

Identify:

• Inside and outside corner components
• Starter strips
• Finish and utility components
• J-channels or product-specific receiving channels
• Horizontal and vertical transitions
• Frieze and band-board details
• Brick, stone, stucco, and masonry transitions
• Roof-to-wall terminations

Do not substitute accessories from another siding system without written manufacturer approval. Color compatibility does not establish dimensional or installation compatibility.

Step 5: Detail Every Window and Door

Record the width, height, projection, existing trim, and planned siding termination at every opening. Grouping all windows into one perimeter total can hide important differences.

Determine:

• Whether the existing trim remains or is replaced
• Whether custom aluminum capping is required
• How the head flashing integrates with the wall
• Which receiving channel fits the siding profile
• Whether shutters, lights, or accessories must be detached
• Whether added wall thickness affects the finished projection

Decorative capping does not replace properly installed flashing. Custom- formed metal must work with the wall's water-management system instead of trapping water behind the trim.

Step 6: Calculate Soffit and Fascia Separately

Soffit and fascia require their own takeoff. Measure overhang depth, total eave length, gables, rakes, returns, porch ceilings, and changes in panel direction.

Confirm:

• Solid, center-vented, or fully vented soffit
• Required net free ventilation area
• Panel profile and width
• Receiving and finishing channels
• Fascia-board depth
• Factory-formed fascia or custom coil
• Rakes, gable peaks, and boxed returns

Gentek's Hi-Tensile aluminum soffit collection includes solid and vented configurations with factory-finished Deluxe fascia options.^[2]

Review Suburban Wholesale's soffit and fascia products before finalizing the order.

Step 7: Calculate Trim Coil by Application

Do not estimate trim coil only by counting rolls. List the applications, required finished widths, hems, returns, laps, and realistic fabrication waste.

Coil applications may include:

• Window and door wraps
• Fascia and rake coverings
• Frieze boards
• Porch beams and columns
• Exterior wood trim
• Transitions between materials

Compare Gentek Performance G8 with the broader trim and gutter coil selection. Coil material, thickness, coating, texture, and intended application must be confirmed before ordering.

Step 8: Plan the Rainware Package

Measure gutter runs, inside and outside corners, end caps, outlets, downspouts, elbows, and extensions. Determine how runoff will move away from the building.

Confirm:

• Gutter size and style
• Gutter-coil material and color
• Outlet quantity and placement
• Downspout size
• Elbow configurations
• Hanger and attachment method
• Discharge locations
• Fascia condition and support

Review Suburban Wholesale's rainware products with the siding and fascia order. Gentek offers gutter-coil colors intended to coordinate with popular siding and window colors.^[3]

Step 9: Confirm Fasteners and Installation Materials

Fasteners should never be treated as generic hardware. Confirm the required type, material, head diameter, length, penetration, spacing, and corrosion compatibility for the exact product and substrate.

The installation package may also require:

• Approved sealants for specified joints
• Flashing materials
• Water-resistive barrier components
• Ventilation baffles
• Mounting blocks
• Special cutting tools or blades
• Touch-up products where expressly approved
• Material-handling and surface-protection supplies

Follow the current Gentek instructions for each product. Experience with one metal siding line does not justify improvising with another.

Step 10: Conduct a Color and Finish Audit

Confirm the approved color in every product category. Do not assume that one color name is available across siding, soffit, fascia, trim coil, gutter coil, and rainware.

Compare physical samples outdoors. Different coatings, textures, gloss levels, and orientations can make coordinated products appear different. Gentek recommends using actual samples for final exterior color decisions.^[4]

Record:

• Product name
• Color name and code
• Coating or finish designation
• Sample approval date
• Owner's written approval

Step 11: Verify Availability and Delivery

Separate stocked material from special-order material. Confirm minimum quantities, lead times, return restrictions, and whether all components can arrive before installation begins.

Stage the delivery by elevation or work sequence when practical. Protect panels and coil from moisture, contamination, traffic, and physical damage. Do not place finished metal where it will be walked on, dragged, or exposed to incompatible debris.

Suburban Wholesale's professional quoting support can help contractors organize products, quantities, accessories, and delivery requirements before the order is released.

Use the First-Day and Last-Day Test

Before approving the order, imagine the crew's first morning. Do they have the starter, corners, fasteners, channels, and initial wall components needed to begin correctly?

Then imagine the final afternoon. Do they have finish trim, final downspout parts, small accessories, warranty documents, and everything required to complete the walkthrough?

The ruthless question is not whether the main siding was counted. It is whether the crew can complete the exterior without a preventable emergency material run.

Product specifications, packaging, profiles, colors, warranties, availability, installation instructions, and applicable requirements may change. Verify current Gentek documents and project conditions before ordering or installing materials.