North Deering, Portland farmhouse with AZEK composite decking by Cardinal Exteriors

Composite & PVC Decks in Kennebunk, Maine

Composite & PVC Decks for Kennebunk homes from a family-owned Portland company. An owner measures on site and writes a fixed-price proposal.

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Composite & PVC Decks for Kennebunk homes

Composite and PVC decking works well at Kennebunk Beach and Lower Village, where salt spray and months of snow cover wear down wood decking faster than it does further inland toward Summer Street, and where a seasonal cottage benefits from not needing sanding and restaining every year to look presentable.

The framing underneath composite decking is still typically pressure-treated lumber and has to meet the same footing and frost-depth requirements as any Kennebunk deck. Boards need enough gap at butt joints and edges to handle the region's full seasonal temperature swing without buckling. On a deck facing open water at Kennebunk Beach, darker composite colors run hot underfoot in full summer sun, worth weighing for a property used mostly in warm weather.

Composite deck furnished as an outdoor living space backing onto woods

How a Deck Structure Is Built

  1. Footing — poured below Maine’s frost line so winter heaving cannot move it
  2. Post — carries the beam load down to the footing
  3. Beam — spans between posts and carries the outer ends of the joists
  4. Ledger — bolted to the house framing, with flashing that diverts water away from the wall
  5. Joists — span from the ledger to the beam, sized and spaced to the decking and the load
  6. Decking — the walking surface, fastened on top with spacing for drainage
New backyard deck built off the rear of a New England-style home

Kennebunk housing at a glance

Census estimates put Kennebunk's median home built around 1983, with about 19 percent of the housing predating 1940 and roughly 30 percent predating 1960. The town's oldest and most architecturally significant houses cluster along Summer Street and in the village center, where 18th- and 19th-century sea captains built grand Federal and Greek Revival homes on shipbuilding wealth. Toward Kennebunk Beach and Lower Village, shingle-style cottages and early-20th-century summer homes take over, while the rest of town, further from the water, holds a larger share of capes, colonials and contemporary homes built from the 1970s onward as Kennebunk grew as a year-round community.

Permits and design review in Kennebunk

Building permits in Kennebunk go through the Code Enforcement Office in the Community Development Department at Town Hall, covering siding, roofing, window and deck work. Because Kennebunk has both river and ocean frontage, Maine's Mandatory Shoreland Zoning Act applies along the Kennebunk and Mousam Rivers and the town's Atlantic coastline, including Kennebunk Beach, Gooch's Beach and Mother's Beach. Exterior work on a Summer Street Historic District property adds a layer of design review that a house elsewhere in town does not face, so that approval is worth confirming before materials are ordered.

Weather and exposure in Kennebunk

Kennebunk Beach, Gooch's Beach and Mother's Beach put the town's southern edge directly on the Atlantic, where nor'easters bring storm surge and wind-driven rain, and salt air speeds the corrosion of fasteners, flashing and gutters faster than it does inland toward the village center. The Kennebunk and Mousam Rivers add a second layer of shoreland exposure further from the coast. Winters bring the usual Maine freeze-thaw cycling, and older, less-insulated attics on Summer Street's historic homes are prone to ice damming at the eaves in a hard winter, same as any older New England house.

Kennebunk at a Glance

What the housing stock and local code enforcement mean for a siding, window, roofing or deck job here.

11,820

Population (ACS estimate)

Median year built: 1983

Homes built before 194019%

Mostly vinyl or fiber-cement siding and insulated replacement windows from recent decades.

State Building & Energy Code (MUBEC)

Enforced — population over 4,000

EPA Lead-Safe Rule (pre-1978 homes)

Applies to at least 30% of homes here

Historic District

Exterior work may need design review

Shoreland Zoning

Applies near the water

Permits

Kennebunk Code Enforcement Office (Community Development Department)

Codes & Permits for Composite Decks in Kennebunk

In Kennebunk, exterior-work permits come from the Kennebunk Code Enforcement Office (Community Development Department) (Kennebunk Town Hall, 2nd Floor, 1 Summer Street, Kennebunk, ME 04043, (207) 985-2102 ext. 1303). With 11,820 residents, over 4,000, Kennebunk is required to enforce the Maine Uniform Building and Energy Code (MUBEC). The Summer Street Historic District, the first historic district in Maine listed on the National Register, can add review for exterior work on its Federal and Greek Revival houses.

  • Maine's adopted 2021 IRC (R507.2.2) requires plastic composite deck boards, stair treads, guards, and handrails to comply with ASTM D7032, and (R507.2.2.1) to be labeled with the allowable load and maximum allowable span determined under ASTM D7032 — meaning composite span limits come from the product's own ASTM D7032 listing/manufacturer data rather than the standard wood joist-span tables, and are often shorter, requiring closer joist spacing than an equivalent wood board. up.codes
  • Composite decking installation must follow both the code and the manufacturer's instructions (R507.2.2.5), so a given product's specific fastening pattern and joist spacing should be pulled from its ICC-ES evaluation report or manufacturer install guide, not assumed from a generic wood-deck spec. up.codes
  • Maine's Shoreland Zoning Act creates a regulated shoreland zone extending 250 feet (horizontal distance) from the normal high-water line of any great pond, river, or coastal wetland, and 75 feet from certain streams; the Act's stated purposes include protecting buildings and land from flooding/erosion and controlling water pollution, and it governs deck and other structure setbacks and the expansion of nonconforming structures within that zone (specific setback/expansion rules are set at the municipal-ordinance level under the state's model guidelines). maine.gov
  • By Maine law (25 M.R.S. §2373), 'the code must be enforced in a municipality that has more than 4,000 residents' (per the most recent federal census); municipalities at or below that population are not required to adopt/enforce MUBEC but may opt in locally, per the state's own program page: 'All municipalities with a population greater than 4,000 are required, by statute, to enforce the MUBEC. Municipalities with a population under 4,000 may choose to enforce the MUBEC.' mainelegislature.org

How Cardinal Exteriors Handles Composite Decks in Kennebunk

  • Maine's adopted deck code (R507.2.4) requires a corrosion-resistant ledger flashing at least 0.019 inch thick, or an approved nonmetallic equivalent — every ledger-attached deck we build in Kennebunk gets it.
  • We set every Kennebunk deck's footings below frost depth and size them to the actual load, following Maine's adopted residential code rather than a rule of thumb.
  • Because Kennebunk has coastal, lake or river frontage, Maine's Mandatory Shoreland Zoning Act may apply to work close to the water, which can affect setbacks on a rebuild.
  • Kennebunk's population (11,820) puts it above the threshold where Maine law requires full MUBEC enforcement, so this job is inspected against that code as well as the local permit.
  • Anything that needs a permit for composite and PVC decks goes through the Kennebunk Code Enforcement Office (Community Development Department).
Kennebunk, ME
A tree-lined stretch of York Street in Kennebunk, with older homes along the road.
Street View © Google

What composite and PVC decks involves

Composite and PVC decking do not need staining, do not splinter, and resist rot, which is why they have become the default for new decks in Maine. Composite boards blend wood fiber and plastic under a protective cap; PVC boards are all synthetic and lighter. The North Deering farmhouse on this site got a rebuilt deck with AZEK composite decking. The framing underneath is still wood, so it is built to last as long as the boards on top.

  • Layout, size and board color are chosen with the owner at the estimate visit.
  • Footings and framing are built to code, with joist spacing that suits the board manufacturer's span rules.
  • Joist tape or flashing protects the tops of joists and the ledger.
  • Boards go down with hidden fasteners or color-matched screws and the expansion gaps the product requires.
  • Matching railings, stair treads, fascia and landings finish the deck.

Signs it is time

  • You are done staining and sealing a wood deck every year or two
  • The deck is in shade or near water where wood stays damp
  • You want a deck that stays barefoot-friendly with no splinters

What affects the price of composite and PVC decks

  • Composite versus PVC, and the product line
  • Deck size, height and shape
  • Railing system and stairs
  • Hidden-fastener versus face-screw installation
  • Footing and framing conditions

Every job is priced from a free on-site visit. Typical ranges for the trade are on our deck building page, and the details of this service are on the composite and PVC decks overview.

For a deeper walkthrough of materials, code details and photos, see our full Composite & PVC Decks: What Changes From Pressure-Treated Lumber guide.

Get a free composite and PVC decks estimate in Kennebunk

Tell us about the house and what you want changed. One of the owners will call to set up a visit, measure, and write a fixed-price proposal. No pressure, no obligation.

Need it today?Call Mike (207) 408-5388

or Bob at (207) 252-0759