The floor of an enclosed trailer affects cargo protection, traction, cleaning, appearance and long-term durability—but the visible flooring material is only one part of the complete floor system.
A trailer floor may include:
- ✓Structural crossmembers
- ✓A plywood or engineered-wood subfloor
- ✓Fasteners and attachment points
- ✓Seams and perimeter edges
- ✓A finished surface or floor covering
- ✓E-Track, D-rings and other cargo-control hardware
This guide compares common enclosed trailer flooring options, explains how flooring affects trailer weight and payload, and helps you choose a floor around the cargo and the job.
Better Trailers Since 2007
1. The Trailer Floor Is a Complete System
The visible surface is not the only part of an enclosed trailer floor.
A complete floor system may include:
- ✓The trailer frame
- ✓Structural floor crossmembers
- ✓The subfloor
- ✓Fasteners
- ✓Seams and perimeter edges
- ✓A finished flooring material
- ✓Cargo-control hardware
Each component performs a different job. The trailer frame and floor crossmembers support the trailer structure. The subfloor distributes cargo weight across that structure. The finished surface affects traction, cleaning, appearance and resistance to everyday wear.
A premium-looking floor covering does not automatically increase the trailer’s structural floor capacity. The completed floor should be evaluated with the cargo, point loads, loading method, trailer frame and certified GVWR in mind.
2. Standard Plywood Trailer Flooring
Plywood is one of the most common enclosed trailer floor materials.
It can provide a durable, practical cargo surface when the panel thickness, grade, support structure and fastening system match the trailer’s intended use.
Advantages of Plywood Flooring
- ✓Practical for general cargo
- ✓Easier to repair than some finished surfaces
- ✓Can accept certain coatings and coverings
- ✓Provides a useful mounting surface for some cargo-control systems
- ✓Usually costs less than premium finished flooring
- ✓Scratches and normal work wear may be less noticeable
Considerations
- ✓Moisture can enter through damaged surfaces, seams and exposed edges
- ✓Oil and chemicals may stain untreated wood
- ✓Dragging equipment can gouge the surface
- ✓Fastener holes and poorly sealed penetrations may allow moisture into the wood
- ✓The appearance may become worn with heavy commercial use
The exact panel thickness, grade and treatment vary by manufacturer and trailer model. Do not assume that all plywood floors are built the same way.
VERIFY THE COMPLETE BUILD: Ask about the subfloor material, thickness, crossmember spacing, fasteners and completed trailer rating.
3. Sealed, Painted and Coated Plywood Floors
A coating can improve the appearance of a plywood floor and may make routine cleaning easier.
Common treatments may include:
- ✓Exterior-grade paint
- ✓Porch or floor paint
- ✓Textured floor coating
- ✓Epoxy-type systems
- ✓Polyurea or polyaspartic-style coatings
- ✓Manufacturer-specific protective coatings
Potential Benefits
- ✓Improved appearance
- ✓Easier cleaning
- ✓Better resistance to some stains
- ✓Ability to add texture or color
- ✓Additional protection for the upper floor surface
Important Limitations
A coating does not make the entire floor waterproof.
Moisture can still enter through:
- ✓Seams
- ✓Screw holes
- ✓E-Track fasteners
- ✓D-ring fasteners
- ✓Exposed plywood edges
- ✓Rear-door and ramp areas
- ✓Damaged coating
- ✓Underside exposure
The coating must also be compatible with the plywood, adhesive, expected temperatures and cargo.
Some hard coatings can become slippery when wet or contaminated with oil. Textured coatings may improve traction but can be harder to sweep and clean.
COATINGS PROTECT THE SURFACE—NOT EVERY EDGE, SEAM OR PENETRATION.
4. RTP Trailer Flooring
RTP flooring is offered on some enclosed trailer configurations as a finished cargo-floor option.
The exact construction and composition can vary by manufacturer, so buyers should verify what “RTP” means on the trailer being considered.
Depending on the specific product, RTP flooring may provide:
- ✓A finished commercial appearance
- ✓Improved traction
- ✓Easier cleaning than unfinished plywood
- ✓Added protection from normal cargo wear
- ✓Better resistance to some moisture and stains
- ✓A durable surface for work or recreational trailers
Questions to Ask About RTP Flooring
- ✓Is it a sheet, panel or applied surface?
- ✓Is it installed over plywood?
- ✓How are the seams joined or sealed?
- ✓How are the perimeter edges finished?
- ✓Is adhesive used?
- ✓How should it be cleaned?
- ✓Can damaged sections be repaired?
- ✓Is it suitable for oil, fuel or chemical exposure?
- ✓How much weight does it add?
- ✓Does it require special care around E-Track and floor fasteners?
VERIFY THE PRODUCT: RTP materials and installation methods may differ between manufacturers. Use the specifications for the actual trailer being ordered.
5. Rubber Coin Flooring
Rubber coin flooring uses a raised circular pattern to create a finished interior surface.
It is commonly considered for:
- ✓Motorcycle trailers
- ✓Race trailers
- ✓Mobile work trailers
- ✓Finished cargo trailers
- ✓Recreational builds
- ✓Trailers carrying rolling toolboxes or equipment
Potential Advantages
- ✓Finished appearance
- ✓Comfortable surface underfoot
- ✓Improved traction in many conditions
- ✓Easier routine cleaning
- ✓Helps protect the plywood surface
- ✓Can reduce some cargo movement and vibration
Considerations
- ✓Adds weight to the completed trailer
- ✓Adhesive must be compatible with the flooring and subfloor
- ✓Poorly finished seams may collect moisture or debris
- ✓Oil and chemical compatibility varies
- ✓Damage can be harder to repair than bare plywood
- ✓Heavy equipment can tear or permanently mark some materials
- ✓Moisture trapped beneath the covering may be difficult to detect
Rubber coin flooring should be installed over a clean, properly prepared subfloor. Seams, edges and penetrations should be planned before installation.
6. Aluminum Tread Plate Flooring
Aluminum tread plate—sometimes called ATP or diamond plate—creates a durable metallic floor surface.
It is often used in:
- ✓Race trailers
- ✓Car haulers
- ✓Motorcycle trailers
- ✓Commercial work trailers
- ✓Ramp-door transition areas
- ✓High-wear cargo areas
Potential Advantages
- ✓Durable finished surface
- ✓Professional race-trailer appearance
- ✓Easier to wipe clean
- ✓Resistant to many everyday stains
- ✓Protects the wood surface from some abrasion
- ✓Works well in selected high-wear areas
Considerations
- ✓Adds weight and cost
- ✓Can become hot in direct sunlight
- ✓Can be noisy when loading metal equipment
- ✓May become slippery when wet, oily or contaminated
- ✓Edges and seams must be finished correctly
- ✓Damage can be difficult to repair invisibly
- ✓Condensation or moisture may become trapped beneath improperly installed panels
Aluminum tread plate can be installed across the full floor or used only in selected areas, such as the ramp, rear transition or equipment-loading path.
MORE METAL DOES NOT AUTOMATICALLY MEAN MORE FLOOR CAPACITY. Structural capacity still depends on the complete trailer floor and frame system.
7. Which Trailer Flooring Is Best?
There is no single floor that is best for every enclosed trailer.
The correct choice depends on:
- ✓Cargo type
- ✓Total cargo weight
- ✓Point loads
- ✓Loading frequency
- ✓Exposure to water, mud, oil or chemicals
- ✓Desired traction
- ✓Cleaning requirements
- ✓Appearance
- ✓Planned cargo-control equipment
- ✓Available payload
- ✓Budget
General Cargo and Moving
Standard plywood or sealed plywood may provide a practical, repairable surface for boxes, furniture and general cargo.
Contractor and Mobile-Service Trailers
Contractor trailers may benefit from durable plywood, a protective coating, RTP flooring or rubber flooring. The final choice should account for:
- ✓Shelving
- ✓Cabinets
- ✓Toolboxes
- ✓Generators
- ✓Compressors
- ✓Batteries
- ✓Workbenches
- ✓Electrical equipment
Landscaping Trailers
Landscaping equipment can bring mud, grass, water, fuel and chemicals into the trailer. Priorities may include:
- ✓Easy cleaning
- ✓Traction
- ✓Water management
- ✓Chemical compatibility
- ✓Resistance to mower tires and equipment stands
- ✓Protection around the rear loading area
Motorcycle Trailers
Motorcycle trailers often benefit from a finished floor with good traction and easy cleaning. Plan for:
- ✓Wheel chocks
- ✓Kickstand loads
- ✓Oil or fuel exposure
- ✓Floor-mounted E-Track
- ✓Tie-down angles
- ✓Wet tires
- ✓Loading-ramp traction
Race and Car-Hauler Trailers
Race trailers may use:
- ✓Rubber coin flooring
- ✓RTP flooring
- ✓Aluminum tread plate
- ✓Checkerboard or custom-finished surfaces
- ✓Selected metal loading paths
The floor must be planned with vehicle weight, tire location, jack loads, cabinets, winches and cargo control in mind.
8. Floor Thickness Does Not Determine Capacity by Itself
A thicker subfloor may provide additional stiffness or fastener-holding material, but thickness alone does not determine the trailer’s floor capacity.
The complete structure may include:
- ✓Main frame rails
- ✓Floor crossmembers
- ✓Crossmember spacing
- ✓Subfloor material
- ✓Panel thickness
- ✓Panel seams
- ✓Fasteners
- ✓Axle placement
- ✓Trailer GVWR
- ✓Cargo position
- ✓Point-load distribution
Two trailers with the same plywood thickness may not have the same floor capacity.
One may use different:
- ✓Crossmember spacing
- ✓Frame material
- ✓Fastening methods
- ✓Axle packages
- ✓Structural reinforcements
- ✓Manufacturer ratings
FLOOR THICKNESS IS ONLY ONE PART OF THE STRUCTURAL SYSTEM. Ask the manufacturer or dealer whether the completed trailer is suitable for the intended cargo and loading method.
9. Understanding Point Loads
Cargo weight is not always distributed evenly across the trailer floor.
A concentrated point load can place a large amount of force on a small area.
Common point loads include:
- ✓Motorcycle kickstands
- ✓Floor jacks
- ✓Machinery feet
- ✓Caster wheels
- ✓Generator feet
- ✓Cabinet legs
- ✓Jack stands
- ✓Pallet corners
- ✓Narrow equipment tires
- ✓Stabilizer equipment
A 2,000-pound machine spread across four wide tires affects the floor differently than the same weight concentrated on four small steel feet.
Point loads should be positioned and distributed carefully.
Depending on the cargo, load-distribution plates, reinforced mounting locations or additional framing may be needed. Planning cargo position and point loads together helps keep the trailer balanced while towing.
TOTAL WEIGHT AND CONTACT AREA BOTH MATTER. Never assume that a finished floor covering reinforces the trailer structure beneath it.
10. Water, Moisture and Floor Edges
Even a covered enclosed trailer can be exposed to moisture.
Water may enter from:
- ✓Wet equipment
- ✓Rain through an open rear door
- ✓Ramp-door seams
- ✓Pressure washing
- ✓Condensation
- ✓Roof or door leaks
- ✓Damaged seals
- ✓Floor penetrations
- ✓Road spray beneath the trailer
- ✓Improper storage
Moisture can become trapped beneath rubber, vinyl, RTP or metal flooring if seams and edges are not properly finished.
Inspect the following areas regularly:
- ✓Rear floor edge
- ✓Ramp transition
- ✓Side-door threshold
- ✓Floor seams
- ✓E-Track fasteners
- ✓D-ring fasteners
- ✓Wall-to-floor edges
- ✓Wheel-well areas
- ✓Underbody
- ✓Any drilled mounting holes
Allow wet trailers and flooring materials to dry completely.
Do not cover moisture damage with a new finished floor before correcting the source of the water.
11. E-Track, D-Rings and Floor-Mounted Equipment
Flooring should be planned before installing cargo-control equipment.
Common floor-mounted equipment includes:
- ✓E-Track
- ✓D-rings
- ✓Wheel chocks
- ✓Winches
- ✓Cabinets
- ✓Shelving
- ✓Workbenches
- ✓Generator mounts
- ✓Motorcycle restraints
- ✓Toolboxes
The visible floor surface is not automatically a structural mounting point.
The holding capacity of mounted equipment depends on:
- ✓Fastener type
- ✓Fastener length
- ✓Backing plates
- ✓Structural framing
- ✓Crossmember location
- ✓Installation pattern
- ✓Subfloor condition
- ✓Manufacturer instructions
- ✓Direction of the applied load
Avoid relying only on short screws installed into a decorative floor covering.
Plan mounting locations before finished flooring is installed whenever possible. This makes it easier to locate crossmembers, add backing and seal penetrations properly.
CARGO-CONTROL CAPACITY DEPENDS ON THE COMPLETE ATTACHMENT SYSTEM.
12. Flooring Upgrades Add Weight
Every flooring material adds some amount of weight to the completed trailer.
The final weight can be affected by:
- ✓Material thickness
- ✓Trailer width and length
- ✓Adhesive
- ✓Metal trim
- ✓Fasteners
- ✓Seam material
- ✓Underlayment
- ✓Floor coating
- ✓Added reinforcement
- ✓E-Track
- ✓D-rings
- ✓Cabinets and shelving
Flooring weight matters because it reduces the remaining payload available for cargo, so always factor GVWR and payload into flooring decisions.
GVWR − COMPLETED EMPTY TRAILER WEIGHT = THEORETICAL PAYLOAD
If flooring, cabinets, E-Track, electrical equipment and other upgrades add weight, the empty trailer weight increases and theoretical payload decreases.
Use the actual completed trailer weight and VIN certification label when confirming capacity.
DO NOT CALCULATE PAYLOAD FROM A BASE-MODEL WEIGHT AFTER ADDING MAJOR OPTIONS.
13. Trailer Floor Cleaning and Maintenance
The correct cleaning method depends on the flooring material.
Plywood
- ✓Sweep loose dirt and debris
- ✓Clean spills promptly
- ✓Avoid soaking the wood
- ✓Allow wet areas to dry completely
- ✓Inspect for soft spots, swelling and separation
- ✓Repair damaged coatings before moisture spreads
Coated Floors
- ✓Follow the coating manufacturer’s cleaning instructions
- ✓Avoid incompatible solvents
- ✓Inspect scratches and chips
- ✓Repair damaged areas before moisture reaches the plywood
RTP and Rubber Flooring
- ✓Sweep or vacuum loose debris
- ✓Use compatible cleaning products
- ✓Inspect seams and edges
- ✓Look for lifting, bubbles or trapped moisture
- ✓Avoid cleaners that damage the material or adhesive
Aluminum Tread Plate
- ✓Remove abrasive debris
- ✓Use an aluminum-compatible cleaner
- ✓Watch for sharp or lifted edges
- ✓Inspect fasteners and seams
- ✓Keep oil and grease from creating a slippery surface
Regardless of material, inspect the trailer after carrying wet, muddy or chemically contaminated cargo.
14. Signs That a Trailer Floor Needs Attention
Inspect the floor if you notice:
- ✓Soft or spongy areas
- ✓Swelling
- ✓Delamination
- ✓Dark water stains
- ✓Persistent moisture
- ✓Mold or mildew
- ✓Loose flooring
- ✓Lifted seams
- ✓Torn rubber flooring
- ✓Sharp metal edges
- ✓Loose E-Track or D-rings
- ✓Rusted or pulling fasteners
- ✓Cracked coatings
- ✓Movement around mounted equipment
Stop using a damaged area if it may no longer support the intended load.
Severe structural floor damage should be inspected by a qualified trailer repair professional.
Do not hide structural damage beneath a new floor covering.
For a broader look at floor inspection and maintenance, see our Trailer Maintenance Guide.
15. Questions to Ask Before Choosing Trailer Flooring
Before ordering a flooring upgrade, confirm:
- ✓What is the structural subfloor material?
- ✓How thick is the subfloor?
- ✓What is the floor crossmember spacing?
- ✓Is the finished flooring installed over plywood?
- ✓How are the seams and perimeter edges finished?
- ✓How much weight does the flooring add?
- ✓Will the surface provide enough traction?
- ✓Is the material compatible with oil, fuel or chemicals?
- ✓Can damaged areas be repaired?
- ✓How should the floor be cleaned?
- ✓Will moisture become trapped beneath the surface?
- ✓Where will E-Track and D-rings be installed?
- ✓Will cabinets or equipment require reinforcement?
- ✓Are concentrated point loads expected?
- ✓Is additional support needed beneath machinery?
- ✓How will the upgrade affect payload?
- ✓Is the floor suitable for the complete cargo load?
Ready to move forward? Request a quick trailer quote once you’ve chosen your flooring.
16. Frequently Asked Questions
What is the best flooring for an enclosed trailer?
The best flooring depends on the cargo, weight, point loads, water exposure, cleaning requirements and intended use. Plywood may be practical for general cargo, while RTP, rubber coin, coatings or aluminum tread plate may provide benefits for specialized builds.
Is plywood strong enough for an enclosed trailer floor?
Plywood can be appropriate when its material, thickness, fasteners and support structure match the intended load. Plywood thickness alone does not determine floor capacity. Crossmember spacing, frame construction and point-load distribution also matter.
What is RTP trailer flooring?
RTP is a finished flooring option offered on some enclosed trailers. Its exact composition and installation method can vary, so buyers should verify the product specifications on the trailer being ordered.
Is rubber coin flooring waterproof?
Rubber coin material may resist water, but the complete floor installation is not automatically waterproof. Moisture can enter through seams, edges, fastener holes and damaged areas or become trapped beneath the flooring.
Is aluminum tread plate better than plywood?
Aluminum tread plate and plywood perform different jobs. Plywood commonly acts as the structural subfloor, while aluminum tread plate may be installed as a finished surface. Aluminum does not automatically increase the structural capacity of the floor beneath it.
Does upgraded flooring increase trailer capacity?
A finished flooring upgrade does not automatically increase GVWR or floor capacity. Some flooring upgrades add weight, which can reduce the trailer’s remaining payload.
How much weight does trailer flooring add?
Added weight depends on the material, thickness, trailer size, adhesive, trim and installation method. Ask for the completed trailer weight or weigh the finished trailer before calculating payload.
Can E-Track be installed over finished flooring?
Yes, but E-Track capacity depends on the complete attachment system. Fasteners, backing, structural framing and installation pattern matter more than the visible floor covering.
Can I install cabinets directly on the trailer floor?
Cabinets may be floor-mounted, but the mounting method should account for cabinet weight, cargo weight, vibration and structural attachment points. Heavy cabinets may require backing or frame-supported mounting.
How do I protect a plywood trailer floor from water?
Keep seals and doors in good condition, clean spills promptly, allow the trailer to dry, protect exposed edges and penetrations, and repair damaged coatings. A surface coating alone does not protect every seam or underside area.
Can a damaged trailer floor be covered with new flooring?
Structural damage should be repaired before adding a new floor covering. Covering soft, wet or delaminated plywood can hide the damage and trap additional moisture.
Should I choose flooring based on appearance?
Appearance can be considered, but cargo type, traction, cleaning, point loads, moisture exposure, added weight and repairability should come first.
17. Choosing the Right Enclosed Trailer Floor
The right trailer floor should match the complete load and the way the trailer will be used.
Before choosing, consider:
- ✓What will be loaded
- ✓How the cargo contacts the floor
- ✓How often the trailer will be used
- ✓Whether water, mud, fuel or chemicals are expected
- ✓Where tie-downs and E-Track will be installed
- ✓Whether cabinets and equipment will be mounted
- ✓How the surface will be cleaned
- ✓How much weight the flooring adds
- ✓Whether the material can be repaired
- ✓How the completed build affects payload
A durable floor is not simply the surface that looks best. It is a complete system designed around the cargo, structure, loading method and daily use.
If you are comparing trailer sizes as well as flooring, see our 7×14 enclosed trailer, 7×16 enclosed trailer and 8.5×20 enclosed trailer guides for complete specifications.
Shop Enclosed Trailers
Compare enclosed cargo trailers, available flooring options and custom-build configurations.
Related Trailer Guides
Find the Right Flooring for Your Trailer
Southern Trailer Depot can help you compare enclosed trailer flooring, cargo-control systems, interior finishes and custom-build options.
We can help you evaluate:
- ✓Plywood subfloors
- ✓RTP flooring
- ✓Rubber coin flooring
- ✓Aluminum tread plate
- ✓Floor coatings
- ✓Finished interiors
- ✓E-Track and D-rings
- ✓Shelving and cabinets
- ✓Electrical packages
- ✓Trailer weight and payload
- ✓Custom trailer configurations
Southern Trailer Depot — Trailer Shoppers’ Last Stop Since 2007