PVC vs. composite decking
PVC contains no wood fibers, so it doesn't absorb water and is lighter than composite. It typically costs more than mid-range composite, and its higher thermal movement makes gapping and fastening details important.
| Factor | PVC | Composite |
|---|---|---|
| Composition | 100% PVC (cellular core) | Wood fiber and plastic, often with a polymer cap |
| Moisture | Does not absorb water | Capped boards resist moisture; core contains wood fiber |
| Weight | Lighter | Heavier |
| Cost | Usually higher | Wide range from economy to premium |
| Thermal movement | Higher — follow gap charts closely | Moderate |
Where PVC decking works best
- Pool surrounds and areas that stay wet.
- Low decks with limited airflow underneath.
- Shaded areas prone to mildew on other materials.
- Homeowners who want the lightest-colored, lowest-maintenance options.
Considerations before choosing PVC
As with composite, darker PVC colors absorb more heat. PVC can show scratches and is not refinishable. Because it expands and contracts more with temperature, end gaps, fastener choice and picture-frame details should follow the manufacturer's installation guide exactly.
Does PVC decking get hotter than composite?
It depends on color and product. Lighter PVC boards often stay cooler than dark composite, and several PVC lines are marketed for reduced heat absorption. Test samples in your own sun.
Because PVC contains no wood fiber, some formulations reflect more heat. But color matters most: any dark synthetic board in full afternoon sun can become uncomfortable barefoot. Shade, orientation and lighter colors remain the most reliable ways to keep a deck comfortable.
How is PVC decking installed differently?
- Follow the manufacturer's expansion-gap chart closely; PVC moves more with temperature.
- Use the approved hidden fasteners or color-matched screws and plugs.
- Allow for movement at butt joints and fascia.
- Confirm joist spacing for the board and layout angle.
How long does PVC decking last?
PVC is designed for long service with mostly cleaning as maintenance, and manufacturers back products with lengthy warranties. Its real-world life also depends on the frame underneath, so pairing PVC boards with well-protected, properly spaced framing is what makes the whole deck last.
How does pvc decking differ across the states we serve?
PVC's moisture-proof core matters most where decks stay wet. The figure varies most between Washington (95) and Minnesota (60).
| State | Wet days / yr (median) | What it means |
|---|---|---|
| Georgia | 80 | Frequent rain: flashing, drainage and airflow protect pvc decking |
| Illinois | 74 | Drier spells: sun and checking are as important as moisture for pvc decking |
| Kansas | 60 | Drier spells: sun and checking are as important as moisture for pvc decking |
| Maryland | 81 | Frequent rain: flashing, drainage and airflow protect pvc decking |
| Massachusetts | 82 | Frequent rain: flashing, drainage and airflow protect pvc decking |
| Minnesota | 60 | Drier spells: sun and checking are as important as moisture for pvc decking |
| North Carolina | 75 | Drier spells: sun and checking are as important as moisture for pvc decking |
| Pennsylvania | 79 | Drier spells: sun and checking are as important as moisture for pvc decking |
| Tennessee | 84 | Frequent rain: flashing, drainage and airflow protect pvc decking |
| Virginia | 77 | Drier spells: sun and checking are as important as moisture for pvc decking |
| Washington | 95 | Frequent rain: flashing, drainage and airflow protect pvc decking |
Figures are medians across our covered communities in each state, from NOAA 1991–2020 climate normals and the Census Bureau's 2020–2024 American Community Survey. Each state and community page explains local conditions in more detail.
