Composite vs Wood Decking: Fire Resistance and Defensible Space in Southern Oregon
Composite decking installed in Southern Oregon runs about 35 to 55 dollars per square foot versus 25 to 40 dollars for wood, and it typically lasts 25 to 30 years without refinishing compared to 10 to 15 years for wood. Some composite products carry ignition-resistant testing for wildland areas, but no decking material is fireproof, so clearing debris and vegetation around the deck still matters most.
Cost, lifespan, and fire performance side by side
Decking near wildland areas gets judged on more than looks. Cost, how long it lasts, and how it holds up during fire season all factor into the decision.
| Factor | Wood Decking | Composite Decking |
|---|---|---|
| Installed cost (per square foot) | $25 to $40 | $35 to $55 |
| Typical lifespan | 10 to 15 years, needs periodic refinishing | 25 to 30+ years, no refinishing needed |
| Fire/heat performance | Combustible; dries out and can ignite easily during fire season | Some products are tested to ignition-resistant standards for wildland-adjacent homes; still not fireproof under direct flame |
| Maintenance | Sanding, staining, or sealing every 2 to 3 years | Occasional cleaning, no refinishing |
Defensible space rules that apply no matter which decking you choose
A deck attached to the house sits inside the zone closest to the structure, where defensible space guidance is strictest. Leaves and needles that collect underneath or between deck boards can hold embers, so keeping that space clear matters as much as the decking material itself.
Vegetation growing up against or underneath a deck, along with anything stored beneath it, adds fuel regardless of whether the boards themselves are wood or composite.
Which decking makes sense if you're near wildland areas
If your home backs up to open land, dry grass, or forest, composite decking with an ignition-resistant listing is worth asking your contractor about directly, and it pays off over time through lower maintenance too.
Wood decking still works well for homes with more distance from wildland vegetation, especially if you're willing to keep up with cleaning underneath the deck and clearing needles between boards during the dry months.
Frequently asked questions
Is composite decking fireproof?
No. Some composite products are tested and rated as more ignition-resistant than wood, but none are fireproof. Direct, sustained flame contact can still damage composite decking.
Can I still use wood decking near a wildland area?
Yes, many homeowners do. It just requires more consistent upkeep, such as clearing needles and leaves from between boards and underneath the deck through fire season.
Does defensible space apply to decks, not just the roof and walls?
Yes. A deck attached to the house is part of the structure for defensible space purposes, so debris and nearby vegetation around it matter just as much as around the foundation.
How much more does composite decking cost than wood?
Expect composite to run roughly 30 to 50 percent more than wood for materials and installation, though it typically closes that gap over time by skipping refinishing costs.