Trex & Composite Decks · Radnor, PA

Trex Deck Builder in Radnor, PA

Slate Building is a certified Trex deck builder specializing in custom Trex and TimberTech composite decks, covered patios, pergolas, and outdoor living spaces throughout Radnor and the Main Line. We build premium, low-maintenance outdoor spaces built to last decades.

5.0 rating · 21 reviewsDesign-build · No subcontractorsServing Bucks County, PA

Recent Outdoor Builds

Real projects, built in-house.

From shaded estate lots in Villanova to refined homes in Wayne and St. Davids, we build low-maintenance Trex composite decks that look beautiful year after year with almost no upkeep.

Stone fire-pit lounge & paver patio
Stone fire-pit lounge & paver patio
Pool deck & covered porch
Pool deck & covered porch
Custom outdoor structure
Custom outdoor structure
Pine-clad outdoor living build
Pine-clad outdoor living build

What We Build

Outdoor living services we offer.

Composite Decks

Low-maintenance Trex and TimberTech composite decking in dozens of colors and grain patterns — fade, stain, and scratch resistant.

Wood Decks

Classic pressure-treated, cedar, and exotic hardwood decks built with hidden fasteners and premium framing for a clean, lasting finish.

Covered Decks

Roofed and covered decks with vaulted ceilings, fans, and skylights so you can enjoy the outdoors rain or shine.

Pergolas

Custom wood and aluminum pergolas — freestanding or attached — for shade, structure, and a defined outdoor room.

Outdoor Kitchens

Built-in grills, stone bars, counters, and prep space engineered for everyday entertaining and built to last decades.

Paver Patios

Natural stone and paver patios, walkways, and seating walls with proper drainage and a flawless, level finish.

Railings

Aluminum, cable, glass, and composite railing systems that are fully code-compliant and tailored to your design.

Lighting

Integrated low-voltage deck, step, and landscape lighting for safety, ambiance, and year-round usability.

Why Homeowners Choose Slate

Craftsmanship you can stand on.

Licensed & insured

Fully licensed and insured in Pennsylvania for your complete peace of mind.

Custom designs

Every project is designed from scratch around your home, lot, and lifestyle.

Premium materials

Trex, TimberTech, natural stone, and custom wood — built to last decades.

Clear communication

One point of contact, transparent pricing, and daily updates throughout.

Local Bucks County contractor

We know local codes, permitting, and what holds up to Pennsylvania weather.

Trex composite deck builder project in Radnor, PA by Slate Building LLC
Low-maintenance Trex composite deck in Radnor, PA on the Main Line.

Certified Trex deck builder on the Main Line

Slate Building LLC is a certified Trex deck builder serving Radnor Township and the Main Line. We design and build premium composite decks using Trex and TimberTech materials — engineered for beauty, longevity, and minimal upkeep. Every project is self-performed by our own crews, from concept through final inspection.

Composite decking is the natural fit for Radnor's discerning homeowners who want a striking outdoor space without the constant maintenance of wood. With capped polymer boards in rich colors and realistic grain, a Trex deck brings the warmth of timber together with the durability of modern engineering.

Why Trex composite suits Radnor homes

The shaded estate lots of Villanova, Bryn Mawr, and St. Davids are demanding environments for wood decks — pollen, leaf litter, and trapped moisture create mildew, warping, and endless refinishing. Trex's fully capped boards resist all of it, with no splinters, rot, or yearly staining.

Trex also gives us design freedom worthy of a Main Line home. We use it for curved fascia, picture-frame borders, contrasting inlays, and seamless transitions to stone patios and pergolas. The finished deck looks custom because every detail is tailored to your Radnor property.

Trex lines, colors, and railing systems

We install the full Trex portfolio — Transcend and Transcend Lineage for the richest grain and a 50-year fade and stain warranty, Select for premium value, and Enhance for budget-conscious builds. When a fully synthetic board is the better choice, we turn to TimberTech AZEK PVC.

Railings and lighting finish the project. Aluminum, cable, glass, and composite railing systems pair with integrated low-voltage deck, step, and post-cap lighting for safety and ambiance after dark. We bring full samples to your Radnor consultation so you can see every option in person.

Low-maintenance decks built to Main Line standards

A Trex deck from Slate Building is engineered to last decades. Our framing uses proper joist spacing, hidden fasteners, and corrosion-resistant hardware so the structure is as dependable as the surface. We handle permits with Radnor Township and coordinate every inspection so your deck is fully code-compliant.

Upkeep is effortless: an occasional rinse keeps your composite deck looking new year after year — no sanding, sealing, or staining. That low-maintenance, high-ROI value is exactly why Trex decks are among the smartest outdoor upgrades for Radnor and Main Line homes.

Proudly serving Radnor, PA & nearby towns

Slate Building LLC builds premium custom decks and outdoor living spaces across Radnor, PA and the surrounding communities, including Wayne, Villanova, Bryn Mawr, St. Davids, Rosemont, Devon, and Garrett Hill.

  • Wayne
  • Villanova
  • Bryn Mawr
  • St. Davids
  • Rosemont
  • Devon
  • Garrett Hill

Have Questions?

Answers for local homeowners.

How much does a Trex composite deck cost in Radnor?

Most Trex and TimberTech composite decks in Radnor range from roughly $24,000 to $80,000+ depending on size, the Trex line, railings, and lighting. Main Line projects often feature premium railings and lighting packages, and composite saves thousands in maintenance over its lifetime.

Which Trex lines do you install in Radnor?

We build with the complete Trex range — Transcend, Transcend Lineage, Select, and Enhance — plus TimberTech AZEK and PRO. We bring physical samples to your Radnor consultation and help you select the line, color, and railing that best suit your Main Line home.

Why is Trex a smart choice for Radnor's wooded lots?

Radnor's mature tree canopy in Villanova, Bryn Mawr, and St. Davids means shade, pollen, and moisture that degrade wood decks fast. Trex's four-sided capped boards resist fade, stain, mold, and rot, so a quick soap-and-water rinse keeps your deck looking new for years.

What warranty comes with a Trex deck?

Trex lines carry limited residential warranties from 25 years on Enhance up to 50 years on Transcend, covering fade, stain, and material defects. We install to Trex specifications so your warranty remains fully valid.

Can you upgrade my existing deck to Trex in Radnor?

If the existing frame is structurally sound and code-compliant, we can replace old wood decking with new Trex boards, railings, and lighting. It's an efficient way for Radnor homeowners to enjoy a low-maintenance composite deck without a complete rebuild.

Explore More

Services & service areas.

Slate Building LLC designs and builds across Bucks County. Browse our services and the towns we serve.