What Foam to Use Under a Boat Floor? Guide & Options

If you're planning to upgrade your boat floor, you might wonder: What kind of foam works best underneath?

Let’s break down the choices, their costs, and why EVA foam boat flooring is such a popular option for DIYers and pros alike.

Common Foam Options for Boat Floors

When people ask “what foam to use under a boat floor”, they usually want:

• Cushioning for comfort

• Noise reduction

• Insulation against heat and cold

• Moisture resistance

Here are some common choices:

1. Polyurethane Foam

• Cheap and widely available

• Closed-cell types resist water

• Not always UV-stable or marine-rated

2. Polystyrene Foam

• Rigid, decent insulation

• Can degrade with moisture if not sealed well

3. PVC Foam Boards

• Tough and moisture-proof

• Heavy and harder to shape

4. EVA Foam Sheets

• Closed-cell and water-resistant

• Lightweight and flexible

• Marine-grade versions are UV-stable

Why EVA Foam Boat Flooring Is a Top Choice

At BoatFloorings, we specialize in EVA foam boat flooring because it solves many problems at once:

• Waterproof: Closed-cell structure keeps out moisture

• Anti-slip surface: Safer in wet conditions

• Comfortable cushioning: Perfect for standing all day

• UV-resistant: Designed for sun-heavy marine use

• Saltwater-ready: Won't degrade in coastal environments

• Easy DIY installation: Cut, peel, and stick

Cost Comparison

Boat owners often want the best value. Here's a typical comparison:

Our EVA foam rolls at BoatFloorings typically cost $80–$180 depending on size and thickness—affordable compared to custom installs that can run thousands.

Easy DIY Marine Flooring Upgrade

One of the biggest advantages? No need to pay for installation.

With BoatFloorings products, you can:

• Measure and cut to fit your boat

• Peel the self-adhesive backing

• Stick and seal in place

No special tools or toxic adhesives needed.

When to Choose EVA Foam Under a Boat Floor

✅ Fishing boats needing non-slip safety
✅ Family boats for barefoot comfort
✅ Saltwater and freshwater environments
✅ Hot sunny regions needing UV stability

Other Features to Look For

• Thickness Options: 6mm standard, 8mm/10mm for extra cushion

• Density Ratings: 130–140, 160–180 kg/m³ for durability

• Hardness Ratings: 50–55°, 57–63°, 60–65° for firm grip

• Anti-UV Formulas: Protects against cracking and fading

• Color & Pattern Variety: Faux teak, diamond, camo, stripe designs

At BoatFloorings, we offer all these options—giving you the flexibility to match your boat’s style and your budget.

Conclusion

When you're asking “what foam should I use under my boat floor?”, think about your real needs:

• Water resistance

• Safety underfoot

• Comfort for long days

• Easy, cost-effective installation

EVA foam boat flooring checks all these boxes. That’s why so many boaters—fishermen, family cruisers, weekend warriors—are choosing EVA as their go-to marine flooring solution.

Explore BoatFloorings

Looking for reliable, affordable marine flooring? Check out our full range of EVA foam boat flooring options and see why more boaters are making the switch.