Deck and Sunroom in Westerville (June, 2025)

This project involved the construction of a new deck and an attached gable-style four-season sunroom on a wooded residential lot. The two structures work together as a connected outdoor living system. The sunroom serves as a fully enclosed interior space, and the exterior deck functions as an open-air landing directly adjacent to it.

The sunroom sits on a 16x16 pressure-treated deck frame engineered specifically to support the weight of the structure, with the finished floor set flush to the existing house door threshold for a seamless transition from the home's interior. The adjacent exterior deck, also 16x16, is framed to match the sunroom's finished floor height, creating a level connection between the two spaces.

The exterior deck is surfaced with TimberTech Terrain+ Series cap stock composite decking installed parallel to the house wall, using Concealoc and Camo hidden fasteners along with Cortex plug fasteners for a clean finish. A picture frame border runs all open edges, and matching TimberTech fascia and apron wrap the deck perimeter. A single 4-foot-wide stair with TimberTech composite treads, risers, and fascia provides access to grade. Westbury VertiCable 36" powder-coated aluminum railing with stainless steel cable balusters runs the full perimeter of the deck and down both sides of the stairs. A low-voltage lighting package includes a transformer, wiring, four riser lights, and eight in-deck surface lights.

The sunroom itself is a gable-style wood-framed structure with a standing seam metal roof, 2-foot overhangs, and 5-inch gutters with downspouts. Inside, cedar v-groove walls and a cedar v-groove vaulted ceiling clad the full interior, giving the space a warm, cabin-like character that fits naturally into the wooded setting. Large fixed and operable windows on all sides bring in views of the surrounding trees and fill the space with natural light. The vaulted gable end is glazed with windows that follow the roofline, adding additional height and light to the interior.

Why This Project Works

• Setting the sunroom floor flush to the existing house threshold creates a smooth, accessible transition between the home's interior and the new structure
• Matching the exterior deck height to the sunroom floor keeps all three spaces — house, sunroom, and deck — on the same level plane
• The cedar v-groove interior walls and vaulted ceiling suit the wooded site and give the sunroom a distinct character compared to a standard addition
• Westbury VertiCable cable railing keeps sightlines open to the surrounding tree canopy from the exterior deck
• TimberTech Terrain+ Series decking and the low-voltage lighting package provide a finished, cohesive exterior deck surface
• The gable roof form with 2-foot overhangs provides meaningful weather protection for both the sunroom and the deck transition area
• The Advantech subfloor inside the sunroom gives the customer flexibility to install their preferred finished flooring

What Materials Were Used

• TimberTech Terrain+ Series cap stock composite decking with hidden fasteners and Cortex plug fasteners
• TimberTech stair treads, risers, fascia, and apron
• Westbury VertiCable 36" powder-coated aluminum railing with stainless steel cable balusters
• Low-voltage transformer, wiring, (4) riser lights, and (8) in-deck surface lights
• Pressure-treated framing with cement pier footings, 4x6 posts, beams, and joists at 16" on center
• 3/4" Advantech subfloor (sunroom interior)
• Cedar v-groove wall and ceiling cladding (natural finish)
• Gable-style wood-framed sunroom structure with standing seam metal roof
• 5" gutters with downspouts, 2-foot overhangs

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