Are Christmas inflatables waterproof?

Short answer: inflatable fabric is water resistant, not waterproof. It sheds rain from the outside adequately, but it is not sealed, water collects in the base, and the continuously running fan pulls damp air through the whole unit all night. Treat rain as something to manage rather than something the unit ignores.

Why not just waterproof it?

Because it has to breathe. The fan pushes air in continuously and that air has to go somewhere — a genuinely sealed inflatable would burst. The fabric is deliberately slightly porous, and that porosity is what lets damp air move through it.

So the unit gets damp inside in wet weather by design. That is fine while it is running; it becomes a problem when it is packed away damp, which is where most long-term inflatable damage actually starts.

Where water actually causes problems

Siting for a wet yard

1. Highest available ground. Even a few inches of elevation keeps the base out of standing water.
2. Not in a hollow or at the bottom of a slope. That is where runoff collects and where the blower will end up sitting in water.
3. Keep the blower off the soil. A paving slab or a board under the blower housing costs nothing and keeps the motor out of the mud.
4. Elevate the cord connection. On a brick or a hook, with a drip loop. See are outdoor Christmas lights waterproof.
5. Check the irrigation. A sprinkler system still running its schedule in December will soak the unit every morning.

After heavy rain

Walk out and check three things: whether water has pooled in the base, whether the blower is sitting in water, and whether the unit is standing to full height. Ten seconds, and it prevents the fan running all night against a load of water.

To drain, unplug, lift the lowest section of the base and tip the water out, then re-inflate. The unit will dry itself out from the inside while running, which is one genuine advantage of a continuously running fan.

Snow and freezing

Snow load is a real issue. Accumulated snow on top of an inflatable can push it over or deform it, and a unit that has partly collapsed under snow will not recover on its own. Brush it off.

Freezing is worse in one specific way: water that has soaked into the fabric and then frozen makes the material stiff and brittle, and moving a frozen unit can crack it. If the unit is frozen and down, leave it until it thaws rather than forcing it.

In sustained freezing weather, many people simply take the inflatables down and leave the lights up. That is a reasonable call and considerably better than a cracked unit.

Drying it properly at takedown

1. 1

   Pick a dry day

   The whole procedure depends on it. Do not take an inflatable down in rain if you can wait a week.

2. 2

   Run it inflated for an hour or two

   The fan dries the inside out. This is the step that actually works and the one everyone skips.

3. 3

   Wipe the outside down

   Dirt and organic matter left on the fabric feed mildew over eleven months.

4. 4

   Check the base is dry

   Turn it and feel inside. The base is the last part to dry and the first to grow mildew.

5. 5

   Fold loosely, not tightly

   A tightly compressed unit traps any remaining moisture. Fold it and put it in a container that allows some air — not a sealed bag.

Full storage guidance is in storage ideas.