Installed cost: separate the shape from the material

RemodelingExpense's vinyl-siding guide, updated July 5, 2026, lists $9–$16 per square foot installed for its vinyl-shake category and $6–$10 per square foot installed for basic lap. Its Cedar Impressions guide, updated June 18, 2026, gives $10–$15 per square foot installed for that polymer shake-style category. These are national publisher planning estimates, not matched contractor bids or manufacturer installed offers.

The product name needs checking before using either shake estimate. CertainTeed's Northwoods specification PDF identifies PVC resin. Its Cedar Impressions specification PDF identifies modified polypropylene copolymer. Both imitate wood siding, but “vinyl shake” should not erase the manufacturer's material identification.

Ask a bidder to name the material and profile, then describe the installed wall and its measured exterior area. Use vinyl siding cost for broader vinyl replacement scope and cedar siding cost for the actual wood alternative. This page examines the panel specifications and warranty documents that help distinguish the purchases.

Installed estimates versus lap vinyl and cedar shake

Published category Installed cost per square foot Date and publisher Scope to preserve in a comparison
Vinyl shake $9–$16 RemodelingExpense, July 5, 2026 General shake-style estimate; exact brand and material need identification
Basic lap vinyl $6–$10 RemodelingExpense, July 5, 2026 Basic lap category from the same guide; not every premium lap product
Cedar Impressions polymer panels $10–$15 RemodelingExpense, June 18, 2026 Publisher's installed estimate; does not isolate each manufacturer profile
Cedar shakes, historical comparison $7–$16 HomeGuide, October 29, 2025 Older national installed wood-shake estimate; product grade and finish unresolved

Sources: RemodelingExpense vinyl styles, RemodelingExpense Cedar Impressions, and HomeGuide's cedar-style table. The cedar figure is explicitly historical, even though the fetched page's search title contains 2026.

The ranges overlap. That does not prove a premium panel must cost less than cedar or establish a fixed price difference between profiles. The sources describe different categories and publication dates, rather than the same walls with interchangeable material schedules. Request complete alternatives from local bidders using the same elevation drawing.

For cedar, have the proposal name the species, shake or shingle product, grade, exposed face, and finish. For imitation panels, require the manufacturer, profile, color, accessories, and governing instructions. A material comparison becomes useful when each total identifies the actual purchase. A general style label leaves those choices unsettled.

Why the two current shake ranges are not interchangeable

RemodelingExpense's Cedar Impressions discussion specifically identifies gables, dormers, trim cuts, pattern layout, and local labor as price factors. Its general vinyl guide groups work by style. The separate estimates therefore do not establish the price of changing only the resin or thickness on an otherwise identical house.

Ask each estimator to mark the shake-covered area. Is the offer for the entire exterior, the front elevation, gables, or small accent sections? Request the retained lap area and every material transition on that drawing. A smaller accent total should be evaluated as a smaller project, with its own access and finishing work.

Have the bidder explain how it measures installed area and prices cut material. Ask whether its unit rate applies to the finished area, the purchased quantity, or another stated convention. Keep the same convention when comparing proposals. Indoor living area should not be silently copied into an exterior cladding quantity.

Request a description of removal and backing preparation alongside the installed total. Ask what is included when the existing wall is opened and what requires a separate decision. If a proposal uses an allowance, have it say what evidence resolves the allowance and when you approve the resulting price.

Named products compared from manufacturer specification PDFs

The following entries come from CertainTeed's actual specification PDFs, marked ©01/26 for Northwoods and ©01/2026 for Cedar Impressions. Those are the documents' printed copyright markings. The entries establish physical specifications, not installed brand prices. The exposure row reads the single- or double-course geometry stated in those schedules.

Documented property Northwoods Single 7-inch Rough-Split Shakes Cedar Impressions D7 Straight Edge Perfection Shingles Cedar Impressions D9 Staggered Rough-Split Shakes
Material PVC resin Modified polypropylene copolymer Modified polypropylene copolymer
Nominal wall thickness .050–.060 inch, as the linked sheet publishes it .090 inch .125 inch
Course exposure 7 inches; single course 7 inches per course; double course 9 inches per course; double course
Published panel dimensions 7 inches by 10 feet 47 by 14 inches 57 by 18 inches
Panel projection 1 inch 3/4 inch 1 inch
Accessory pocket 1 inch 3/4 inch 1 inch
Warranty document Northwoods Lifetime Limited, ownership conditions apply Cedar Impressions Lifetime Limited, ownership conditions apply Same Cedar Impressions document; confirm ordered finish
Purchasing judgment Published thickness range cannot be turned into one exact value without order confirmation Match the shallow pocket and double-course layout to the trim design Match deeper pocket and different course spacing to the elevation design

Sources: Northwoods specification, PDF page 1; Cedar Impressions specification, PDF pages 1–2; Northwoods warranty; and Cedar Impressions warranty. The judgment row applies the extracted specifications to quote review; it is not a strength ranking.

Thickness is different from panel projection

The Cedar Impressions specification gives D7 Straight Edge Perfection a nominal wall thickness of .090 inch and a 3/4-inch projection. Those measurements appear in separate columns. A proposal describing the panel as “three-quarter-inch thick” needs clarification about which measurement it means.

Likewise, the Northwoods sheet marked ©01/26 publishes a .050–.060-inch nominal thickness range in its profile rows. This page preserves that range. Ask the supplier to identify the exact specification applicable to the delivered profile instead of substituting a point thickness found in an older description.

Request product labels or order codes with the bid. If the seller uses “heavy duty” or “premium” as its only specification, ask for the manufacturer document behind that description. Keep material thickness, projection, dimensions, and required accessories separately identified so a substitution can be reviewed on the same basis.

Do not rank different resins solely by their thickness numbers. Ask for performance evidence appropriate to the proposed product and installation. The table supplies measured descriptions to compare; a decision about a particular exposure or fastening arrangement needs the actual documentation rather than a larger number selected from one column.

Course exposure and panel height answer different questions

The Cedar Impressions sheet describes D7 as a double-course panel with a 14-inch height. Its D9 rough-split panel has 18 inches of double-course height. The resulting course exposure is the individual course height shown in the profile name, rather than the complete panel height.

Ask the contractor to draw course lines on the actual elevation. Show where they meet the windows, doors, lap siding, and roof edges. Review the treatment at the top and bottom of each section before accepting the appearance from a small loose sample.

For a wood alternate, request its specified exposure and coverage calculation separately. Do not assume a package of cedar shakes covers the same area as a box of molded panels or that a course name makes the installation layouts identical. Ask each supplier to explain coverage for its proposed product and method.

Keep purchased material and installed coverage separate in the order. Have the installer identify cuts, partial panels, corners, and spare material without applying an unexplained universal allowance. If the chosen profile or exposure changes, request a revised layout and quantity before delivery. This ties the accepted appearance to both the order and the installed price.

The receiving pocket must match the selected profile

CertainTeed's Northwoods PDF calls for a 1-inch accessory pocket for Rough-Split Shakes. The Cedar Impressions schedule lists a 3/4-inch pocket for D7 Straight Edge Perfection and a 1-inch pocket for D9 Staggered Rough-Split. The quote should resolve those accessories with the profile, rather than treating all trim as interchangeable.

Ask the installer to identify the receiving pocket, starter, corner system, and top termination by product. Have the quote include matching components at every opening and change of cladding. Request a physical sample showing the proposed panel inserted into the actual trim so its finished relationship can be reviewed.

Where retaining existing trim, ask how its compatibility will be established. Have the installer identify any replacement or build-out work in the proposal. If another trade supplies the window surrounds, agree who checks the receiving detail and who approves a change.

For a mixed lap-and-shake elevation, mark the transition on the drawing. Ask whether the two claddings share a component or require separate terminations. Retain the accepted detail with both material schedules. A line reading “all trim included” becomes much more useful when it names the parts and their locations.

Review removal and backing before comparing installed totals

Request a complete description of what remains behind the new panels. Does the contractor retain existing siding, remove it to the sheathing, replace selected backing, or rebuild a larger portion of the wall? Have the estimator mark those boundaries and identify the evidence supporting each retained layer.

Ask who determines whether a concealed finding requires repair. Request photographs, a proposed repair description, and an approval process before the additional work is covered. If repair pricing is provisional, ask how quantities will be measured and reported. Avoid letting an undefined repair allowance become the only explanation for a changed total.

If adding insulation or furring, request the complete section with the proposed cladding attachment. Ask the supplier or installer to identify the instructions and approvals for that backing. Keep the same section with the order and the installation scope; a changed wall layer should trigger review of the affected connections.

For window or door work performed at the same time, request a written sequence and assigned responsibilities. Have both trades identify the flashing connections and which work must be completed before the panels conceal it. The goal is a shared description of the finished wall that can be priced and documented by the companies doing the work.

D7 installation uses panel temperature and a center fastener

CertainTeed's D7 Straight Edge and Staggered Perfection installation PDF, page 1, directs spacing from the panel temperature at installation, using its PanelThermometer and indicator lines. It also directs nailing through the round center hole to control the direction of expansion and contraction. These are profile-specific instructions.

Ask the installer how it will apply the indicator system throughout the workday. Have it explain its procedure for panels that have been cut and its handling of the center fastening location. Request confirmation that the crew is using the instructions for the delivered profile rather than a generic habit carried over from another panel.

The same D7 PDF requires nails over a suitable flat solid substrate and disallows staples. Ask the contractor to name that substrate, the chosen fasteners, and the installation document in the contract. Keep any manufacturer-approved alternate in writing with the proposal.

Request concealed-work photographs at agreed stages. Ask the installer to show the relevant fastening and transition work before it becomes difficult to inspect. These records document the selected method; they do not replace the manufacturer's instructions or demonstrate compliance merely because the finished face looks even.

Gables and accents need their own layout review

A shake accent should have an agreed boundary and finish detail before the material is ordered. Ask the estimator to mark the highest and lowest courses, the treatment beside the roof, and the connection to the retained cladding. Review those locations on the actual house drawing rather than approving a decorative panel in isolation.

Request a representative installed sample where practical. Ask how the layout will handle partial panels and visible repetition, and have the installer show the chosen corners and transition parts. Record what constitutes acceptance of appearance so the material selection and layout can be reviewed against the same reference later.

For an alternate using cedar, request a separately described wood layout and finish sample. The cedar siding guide examines species, profiles, grades, and exposure. Do not describe the alternate as the same installation with only the surface texture changed.

If reducing the accent area to meet a budget, request a revised elevation and complete total. Ask which access, trim, and preparation tasks remain in the reduced scope. This produces an actual revised offer; a national unit range alone cannot tell you how a smaller section changes the local contractor's work.

Seattle's adopted polypropylene substrate requirement

Seattle's 2021 Residential Code Chapter 7 PDF, printed page 7-26, contains R703.14.1.1, “Installation,” which states:

Polypropylene siding shall be installed over and attached to wood structural panel sheathing with minimum thickness of 7/16 inch (11.1 mm), or other substrate, composed of wood or wood-based material and fasteners having equivalent withdrawal resistance.

R703.14.1.2, “Fastener requirements,” also states:

Staples are not permitted.

This is a Seattle adopted-code fact for polypropylene siding. It is not a universal approval of a wall assembly or a rule that automatically governs PVC Northwoods elsewhere. Read the complete polypropylene provisions, including the section's other conditions, with the responsible designer or local reviewer.

For a Seattle proposal, ask the contractor to identify the backing and fasteners satisfying the applicable requirements and manufacturer instructions. Have it describe any retained substrate and the documentation supporting an alternate. Keep that answer with the installed scope.

Outside Seattle, obtain the locally adopted requirements for the named material and proposed assembly. If the quote changes from PVC to polypropylene, ask the supplier and authority to review that changed identification. A wood appearance does not establish which cladding provisions apply.

Lifetime warranty changes with ownership and coverage

The Northwoods warranty PDF and Cedar Impressions warranty PDF, both effective March 1, 2023, distinguish the original individual owner-occupant's single-family home from subsequent owners and other ownership or building arrangements. The former has the qualifying lifetime, non-prorated manufacturing-defect coverage; the latter has a 50-year prorated term measured from original installation.

Each document gives excessive-fade coverage a separate 10-year term and makes that coverage nontransferable. The headline duration therefore does not answer every ownership and coverage question. Ask the supplier which document and conditions govern the actual purchase, including your ownership arrangement and selected finish.

Request the complete warranty before ordering. Keep its version and effective date with the product schedule. If the seller says coverage transfers, ask it to show what transfers and what changes under the relevant section. A general statement of transferability leaves the proration and separate fade provision unresolved.

Ask for the installation company's workmanship agreement separately. Have it identify the covered installation work, the service process, and its responsibility for adjacent finishes. Keep the agreements independently named in the contract so a manufacturing-defect promise cannot silently become the description of installation-work coverage.

Manufacturing remedies and hail remedies have different limits

The Cedar Impressions warranty allows CertainTeed to choose a specified repair, replacement, refinishing, coating, or refund remedy for a covered manufacturing defect. Its obligation is capped by the affected originally installed product's purchase price and original installation labor. Read the remedy with the coverage conditions rather than assuming any future wall-restoration bill is fully covered.

The Northwoods warranty's hail section directs the owner to pursue available insurance first. Its stated limits exclude the insurance deductible, labor, and other removal or replacement costs. That is a different remedy from the manufacturing-defect provision; “hail warranty” should not be read as payment of every storm-related expense.

Ask the seller to walk through the applicable claim process using the type of problem you want covered. Have it identify the warrantor, the required records, and any cost remaining outside that promise. Request the contractor's separate written service commitment where its work is involved.

Avoid assigning a monetary value to coverage without the relevant agreement and circumstances. The useful comparison is which defect, owner, product, and remedy the document actually addresses. Preserve those details beside the price instead of ranking panels by the longest duration printed on a brochure.

Cleaning and finish changes need the applicable instructions

The Cedar Impressions warranty excludes power-washed products and addresses unauthorized coatings and distortion from external heat sources. The Northwoods warranty also includes maintenance, installation, and external-heat limitations. A low-maintenance appearance is not an instruction to ignore the product's care document.

Ask the installer to supply the care instructions at handover. If hiring a cleaning provider, identify the product and give it the applicable instructions before agreeing to a method. Request manufacturer guidance for a persistent mark or proposed coating rather than approving a treatment solely from a generic siding-cleaning description.

Before purchasing, show the estimator nearby equipment and surfaces that may affect the proposed installation. Ask the supplier how those site conditions should be addressed under the product instructions. Keep any required adjustment in the scope so it is resolved before the panel location becomes fixed.

For cedar, ask the bidder for the maintenance plan for its named wood product and finish. Compare the actual ownership tasks you are prepared to arrange. This page does not invent an annual maintenance bill or a payback period for choosing one material over another.

Finish with an order and a documented handover

Before acceptance, collect the elevation layout, material and accessory schedule, backing detail, applicable installation instructions, warranty documents, and complete installed total. Ask for revised documents when a profile, color, retained layer, or transition changes. The order and the installation scope should describe the same wall.

At delivery, request confirmation of product identifiers and approved substitutions. At completion, compare the installed boundaries and trim with the accepted layout. Record any unresolved appearance, fastening, or finish issue and the agreed correction process.

Keep invoices, installation dates, product identification, photographs, and both manufacturing and workmanship agreements. Those records give a future service request a specific product and installation to investigate. They also make it possible to review what the accepted price bought without reconstructing the selection from a general “shake siding” invoice.

What we could not verify

  • ICC's hosted 2021 IRC Chapter 7 returned HTTP 403 on plain fetch; a browser-agent retry returned only a page shell without section text, and the web tool could not open that URL. The code fact uses Seattle's reachable adopted-code PDF and is scoped to Seattle.

Questions to ask before you compare quotes

Sources

All retrieved 2026-09-30.

  1. RemodelingExpense, "Vinyl Siding Cost: 2026 Installed Price Calculator," July 5, 2026 (visible body style table, installation included)
  2. RemodelingExpense, "Cedar Impressions Vinyl Siding Cost: 2026 Installed Price Calculator," June 18, 2026 (publisher's installed estimate; manufacturer material is polypropylene)
  3. HomeGuide, "How much does house siding cost to install or replace?" October 29, 2025 (historical cedar-shake comparison; visible body fetched through web tool after direct HTTP 403)
  4. CertainTeed, "Northwoods Specification Sheet," marked ©01/26 (primary-document extraction; manufacturer-hosted PDF)
  5. CertainTeed, "Cedar Impressions Specification Sheet," marked ©01/2026 (primary-document extraction; manufacturer-hosted PDF)
  6. CertainTeed, "Northwoods Lifetime Limited Warranty," effective March 1, 2023 (primary-document extraction; ownership, fade, and hail provisions)
  7. CertainTeed, "Cedar Impressions Lifetime Limited Warranty," effective March 1, 2023 (primary-document extraction; ownership, remedy, and maintenance provisions)
  8. CertainTeed, "Cedar Impressions D7 Straight Edge Perfection Shingles & D7 Staggered Perfection Shingles Installation Instructions" (primary-document extraction; panel-temperature spacing and fastening)
  9. Seattle SDCI, "2021 Seattle Residential Code, Chapter 7 — Wall Covering," R703.14.1.1 and R703.14.1.2 (primary-document extraction; printed page 7-26)