Soft or spongy horse trailer floor

A soft, spongy or flexing trailer floor means rotten wood or corroded aluminum under the mats, and it should not carry a horse until it is fixed. Typical prices around Ocala: one 4 by 8 foot section of boards about $290 plus lumber; a full wood floor about $9 to $13 per square foot, roughly $600 to $900 for a typical two-horse floor; aluminum floor work $12 to $20 per square foot. Pull the mats and check before you haul again.

Check this first

1. Pull every mat out. All of them, not just the back. Mats hide everything.
2. Look. Dark, wet, or crumbling wood. On aluminum, white powder, pitting or pinholes.
3. Probe. Push a screwdriver into each board, hardest at the back, by the ramp or door, and under where the horses stand. If it sinks in, the board is gone.
4. Stand and bounce gently on each section. A sound floor does not flex.
5. Look underneath with a flashlight. Rusted or corroded crossmembers, sagging boards, daylight between planks where there should be none.

What is usually wrong

Full ranges are on the pricing page and the floor calculator prices your size.

Why it happens

Flooring guides say it plainly: horse urine is acidic and rots wood and corrodes aluminum floorboards over time. The damage happens under rubber mats that never come out, where nothing dries. That is why each maker we cover publishes a mats-out schedule: Sundowner every sixty days, Featherlite and Exiss every three months, 4-Star every six months. Exiss also says to raise the front of the trailer when washing so the floor drains, and to treat the dry floor with baking soda between cleanings.

Why it matters

A hoof through the floor at highway speed can end a horse’s career or its life. There is no safe soft floor.

When to call

Any board that a screwdriver sinks into, any visible daylight, any crossmember that is rusted thin. See trailer floor replacement and horse trailer repair. For aluminum floors with white powder, see aluminum corrosion on a horse trailer.