1. Accurate Measurements of Every Exterior Wall

Before ordering siding, you need an accurate measurement of the exterior surfaces being covered.

Measure the length and height of each wall separately. Include gables, dormers, garage walls, bump-outs, and other architectural features.

Record window and door openings using a consistent estimating method. Keep your measurements organized by elevation so you can review them if questions arise.

Remember that one square of siding equals 100 square feet of coverage. However, actual carton coverage varies by manufacturer and product profile.

Never assume a home's interior square footage tells you how much siding to order.

2. The Exact Siding Manufacturer and Product Line

Not all vinyl siding products are interchangeable, even when they appear similar.

Before contacting your supplier, identify the manufacturer, product collection, and specific profile you intend to install.

For example, a traditional double-four-inch horizontal panel may have different dimensions, exposure, accessories, and installation requirements than a Dutch lap or board-and-batten product.

Explore siding products available through Suburban Wholesale & Supply when comparing exterior cladding options for your next project.

3. The Correct Siding Color and Finish

Color selection is one of the most important details to confirm before ordering.

Record the exact manufacturer color name and product identification when available. Do not rely on descriptions such as light gray, dark blue, or white.

Different manufacturers may use similar color names for noticeably different finishes.

For repairs or additions, identify the existing siding manufacturer, profile, color, and approximate age. Even the same nominal color can vary between production runs or appear different after years of weather exposure.

Whenever possible, have the homeowner approve a physical product sample before finalizing the order.

4. Total Siding Quantity and Waste Allowance

Once you calculate the net siding area, determine the appropriate waste allowance for the project.

Straightforward projects may require less cutting waste than homes with numerous gables, windows, corners, and short wall sections.

A preliminary allowance of approximately 5% to 10% is sometimes used for simpler projects, while more complex elevations may require additional material.

These percentages are only planning guidelines. Final quantities should reflect actual panel dimensions, layout, cutting patterns, and reusable offcuts.

Confirm the usable square footage per carton and round your order up to the required purchasing unit.

5. A Complete List of Siding Accessories

Ordering enough siding panels does not mean you have everything needed to complete the installation.

Prepare a separate accessory takeoff that includes the products required for your particular siding system.

• Starter strip
• Inside and outside corner posts
• J-channel and specialty receiving trim
• Utility trim or undersill trim
• Window and door trim components
• Light blocks, outlet mounts, and vent accessories
• Soffit, fascia, and related finishing materials
• Trim coil, flashing, fasteners, and weatherproofing products

Measure linear-foot accessories individually and count specialty components by location. Confirm compatibility with the selected siding profile.

6. Jobsite Conditions and Existing Wall Details

The condition of the existing exterior can affect both your material requirements and installation schedule.

Determine whether the project involves removing existing siding, installing over an approved existing surface, replacing damaged sheathing, or making changes to the wall assembly.

Note any unusual transitions, uneven surfaces, water damage, or areas that may require additional flashing and preparation.

Follow applicable building codes and manufacturer instructions. Allow for concealed damage that may not be visible until demolition begins.

7. Trim Colors and Accessory Compatibility

Contractors sometimes select the siding color but forget to confirm the colors of the corners, J-channel, window trim, soffit, and fascia.

Some homeowners prefer matching trim, while others choose contrasting colors to highlight architectural details.

Create a written color schedule identifying each product and its selected finish.

This is especially important when ordering materials from multiple product collections or manufacturers.

8. Your Project Start Date and Material Lead Time

Before scheduling your installation crew, confirm whether the selected materials are available and when they can realistically be obtained.

Standard inventory products may have different fulfillment timelines than specialty colors, uncommon profiles, or special-order accessories.

Ask your supplier to confirm current availability, order cutoffs, estimated arrival dates, and any special-order conditions.

Avoid promising a firm installation date based on unconfirmed material availability.

9. Delivery Address and Unloading Instructions

Accurate delivery information helps prevent avoidable scheduling problems.

Provide the complete jobsite address, contractor contact information, requested delivery date, and any special access instructions.

Identify narrow driveways, restricted parking, limited unloading areas, or other conditions that may affect delivery.

Confirm delivery services, charges, and unloading responsibilities with your supplier before placing the order.

10. Final Pricing, Order Details, and Payment Terms

Before approving the order, review the complete material list and associated costs.

Confirm product quantities, unit pricing, freight or delivery charges, applicable taxes, and payment terms.

Ask about return policies, special-order restrictions, and procedures for reporting shortages or damaged materials.

Keep a written order confirmation that identifies the exact products, colors, quantities, and delivery arrangements.

Learn more about Suburban Wholesale & Supply's contractor-focused approach to exterior building-material distribution.