Last reviewed May 2026 by WM Construction, Licensed MA General Contractor
WM Construction handles full cedar deck construction across Cape Cod, Western Red Cedar, Atlantic White Cedar, and other cedar species installed with stainless steel fasteners, end-grain sealing on every cut, and code-compliant framing per IRC R507. Cedar deck installation runs 2 to 4 weeks on site, similar timeline to other decking materials but with cedar-specific requirements that affect both performance and longevity. Footings to 48-inch frost depth, ledger flashed and through-bolted with stainless lag bolts, framing per IRC R507, then cedar decking with stainless fasteners (cedar tannins react with non-stainless producing permanent black streaks), end-grain sealing on every field cut, and initial finish coat where specified. Approved Hanscom Air Force Base vendor since 2015. Office: 1550 Falmouth Road, Suite 26, Centerville, MA 02632. Call (774) 224-8561.
Most Cape Cod cedar deck installations come from one of three triggers. A homeowner of a traditional Cape Cod or shingled cottage where cedar matches the architectural language of the home and composite would visually conflict with the cedar shake siding, weathered shingle aesthetic, or historic character. A natural wood preference where the tactile and visual qualities of real cedar (warm tone, natural grain, eventual silver-gray weathering) take priority over composite's lower maintenance and the homeowner is willing to accept the sealing schedule. A historic district property where natural materials are required by deed restriction, town historic commission rules, or neighborhood association covenants prohibiting synthetic decking.
Cedar deck installation requires species and grade decisions that wood-substitute and composite installations do not. Western Red Cedar and Atlantic White Cedar are the two most common species on Cape Cod, with Atlantic White Cedar carrying historic regional authenticity. Clear grade has minimal knots and runs highest cost; select knotty and knotty grades have visible character. Kiln-dried cedar runs more dimensionally stable than air-dried but costs more. WM Construction is a Cape Cod-based licensed Massachusetts general contractor, not a national franchise booking jobs through a 1-800 line, operating from Centerville since 2016 and an approved Hanscom Air Force Base vendor since 2015.
| Cedar Variable | Options | Trade-Off | Best For |
|---|---|---|---|
| Species | Western Red / Atlantic White | Availability vs regional authenticity | Modern Cape vs historic district |
| Grade | Clear / Select Knotty / Knotty | Cost vs visible character | Premium vs rustic aesthetic |
| Drying | Kiln-dried / Air-dried | Stability vs cost | Frameless aesthetic vs budget |
| Finish | Natural weather / Sealed / Stained | Maintenance vs color preservation | Silver patina vs original tone |
Western Red Cedar is the most widely available cedar species, harvested from Pacific Northwest forests, with rich red-brown heartwood, moderate density, and natural rot and insect resistance. Available in clear, select knotty, and knotty grades. Best for most Cape Cod cedar decks where the buyer wants traditional cedar aesthetic at moderate price point and broad availability.
Atlantic White Cedar is the historically authentic New England decking species, native to coastal swamps from Maine through North Carolina including Cape Cod. Lighter color than Western Red, very stable dimensionally, exceptional rot resistance, supply more limited than Western Red.
Clear grade cedar has minimal knots and a uniform appearance, the highest grade available and the most expensive. Often kiln-dried for dimensional stability. Best for premium installations where uniform aesthetic is the priority, and for visible decking surfaces where knot character would not be welcome.
Select knotty and knotty grade cedar have visible knots, color variation, and natural character that many homeowners prefer for the rustic aesthetic that matches traditional Cape Cod and cottage-style homes. More economical than clear grade.
Cedar tannins react with non-stainless fasteners (galvanized, hot-dipped galvanized, even some coated screws) producing black streaks that bleed across the deck surface within months of installation. Stainless steel fasteners are non-negotiable on cedar decks. The few-dollar premium per pound of fasteners prevents permanent visual damage that no amount of sealing or refinishing reverses.
Cedar absorbs moisture most aggressively at end grain (the cut ends of boards). End-grain sealing with a penetrating wood preservative or sealer at every field cut prevents accelerated rot at board ends, which is the most common cedar failure point. Sealing during installation costs minimal time; addressing failed end grain after installation requires board replacement.
Western Red Cedar suits most projects with broad availability and traditional cedar aesthetic. Atlantic White Cedar suits historic homes and regional authenticity priorities. Clear grade suits premium uniform aesthetic. Select knotty and knotty suit character-driven and budget-conscious projects. Real recommendation matches species and grade to your specific home, district requirements, and aesthetic priorities, guided by Cedar Shake & Shingle Bureau industry standards.
Cedar can be left to weather naturally to silver-gray, sealed with a clear penetrating finish to slow weathering, or stained for color preservation. Initial finish coat (where specified) applied after installation and before deck use protects the wood through the first season.
Every WM Construction cedar deck installation closes with a written one year workmanship warranty on the install work. Cedar material naturally weathers and requires periodic maintenance refinishing under any warranty.
Onsite walkthrough at your Cape Cod home to inspect proposed deck location, assess grade and drainage, identify house attachment points, discuss deck configuration, and recommend cedar species and grade based on architectural style, district requirements, and aesthetic priorities. Historic district verification where applicable. Typically one to two hours on site.
You select cedar species (Western Red, Atlantic White), grade (clear, select knotty, knotty), kiln-dried or air-dried preference, fastener type (stainless steel standard), railing material, and finish coat (natural, sealed, stained). Selections finalized in writing before contract signing. Estimate breaks out footings, framing, ledger, cedar decking, fasteners, end-grain sealing, finish coat, railing, and stairs as distinct line items.
Contract signed with milestone schedule. Building permit pulled with the Cape Cod town under 780 CMR. Insurance certificates delivered before mobilization. Cedar material sourced and delivered to align with installation start. Atlantic White Cedar can require longer sourcing time given more limited supply.
Footings excavated to 48 inch frost depth and inspected. Concrete piers installed. Ledger attached with proper flashing using stainless lag bolts or through-bolts. Framing installed with joist hangers and post bases.
Cedar decking installed with stainless steel fasteners. End-grain sealed at every field cut. Railing installed with code-compliant guardrail height and baluster spacing. Stairs built to code. Initial finish coat applied where specified. Final inspection scheduled.
Cape Cod cedar deck installation cost is shaped by deck size, cedar species and grade, configuration, and finish scope. Cedar species is a meaningful variable: Western Red Cedar runs lower and is broadly available, Atlantic White Cedar runs higher due to limited regional supply but delivers historic authenticity. Cedar grade swings cost: knotty grade runs lowest, select knotty mid-range, clear grade highest. Kiln-dried cedar runs higher than air-dried but offers better dimensional stability.
Deck size scales material and labor proportionally. Configuration matters: ground-level decks run lowest, raised and multi-level decks add scope, wraparound decks scale footing count substantially. Stainless steel fasteners run higher than galvanized but are non-negotiable on cedar (cedar tannins react with non-stainless fasteners). Initial finish coat (sealed or stained) adds material and labor. Site conditions affect cost. We provide line item estimates that break out species, grade, fasteners, finish coat, and railing as distinct categories. Call (774) 224-8561.
Customer Reviews
★★★★★We wanted Atlantic White Cedar for our 1880 Brewster home in the historic district. Marcelo sourced the AWC, sealed every end cut, and used stainless throughout. Three years later it has weathered to that beautiful silver-gray and zero black streaking on a single fastener.
★★★★★WM put in a clear-grade Western Red Cedar deck on our shingled cottage in Falmouth. They explained the stainless fastener requirement upfront, which a previous contractor never even mentioned. Cedar grain is gorgeous and the deck reads exactly like the original architecture.
WM Construction installs cedar decks across Cape Cod and Barnstable County, Upper Cape (Bourne, Sandwich, Falmouth, Mashpee), Mid-Cape (Barnstable, Centerville, Yarmouth, Dennis), and the Outer Cape (Brewster, Harwich, Chatham, Orleans, Eastham), where historic homes and traditional Cape Cod architecture frequently require cedar decking. Plymouth and the South Shore communities just over the Sagamore Bridge and Bourne Bridge round out the service area. Owners of traditional Cape Cod homes, shingled cottages, historic district properties, and waterfront homes preferring natural wood aesthetic all schedule installations through the same licensed crew.
Office and showroom: 1550 Falmouth Road, Suite 26, Centerville, MA 02632. Call (774) 224-8561 to schedule an on-site cedar deck consultation. Approved Hanscom Air Force Base vendor since 2015.
Yes. Every Cape Cod town requires a building permit under 780 CMR for residential deck construction, regardless of whether the decking is cedar, composite, or pressure-treated. Footing inspection before backfill, framing inspection before decking, and final inspection close out the permit. Historic district properties may also require historic commission sign-off before the building permit is pulled.
Both perform well on Cape Cod. Western Red Cedar is broadly available, with rich red-brown heartwood and moderate price point, suitable for most cedar deck projects. Atlantic White Cedar is the regionally authentic New England species native to coastal Massachusetts, lighter in color with exceptional rot resistance, more limited in supply, suitable for historic homes and properties prioritizing native species heritage.
Cedar decks on Cape Cod typically need sealing or refinishing every 1 to 2 years on coastal exposure to maintain the original color and prevent silver-gray weathering. Inland properties with less salt and sun exposure may extend to 2 to 3 years between refinishing. Cedar can be left to weather naturally to silver-gray as a low-maintenance approach, though structural sealing of end grain remains important.
Cedar contains natural tannins that react with non-stainless fasteners (galvanized, hot-dipped galvanized, even some coated screws) producing black streaks that bleed across the deck surface within months of installation. The reaction is permanent. Stainless steel fasteners eliminate the reaction and the visual damage. The few-dollar premium per pound of fasteners is non-negotiable on cedar.
Yes, if left untreated or with only natural penetrating sealers. Cedar weathers to a silver-gray color over 1 to 3 years on Cape Cod coastal exposure, which many homeowners prefer aesthetically. To preserve the original cedar tone, regular sealing or staining is required.
<p>Installing a cedar deck on a Cape Cod home is a species and aesthetic decision before it is a configuration decision, and the difference between a cedar deck that ages beautifully and one that fails prematurely is whether the contractor matched cedar species to the project, used stainless steel fasteners, and sealed end grain on every cut. Call <strong>(774) 224-8561</strong> or request a site visit, and Jackeline or Marcelo will walk through your property, recommend cedar species and grade, and produce a written line-item estimate.</p> <p>Office: 1550 Falmouth Road, Suite 26, Centerville, MA 02632. Approved Hanscom Air Force Base vendor since 2015.</p>
