How to Insulate a Tent For AC – Stay Cool While Summer Camping

shady tent

Few things are more fun than spending a night out in nature in the summer, but sometimes the heat inside your tent can get a bit too high for comfort. One of the best ways to handle that heat is to keep your tent air-conditioned. However, if you want to keep the cool air inside your tent, you’ll also need to properly insulate it.

In this article, our team of experts will show you exactly how to insulate a tent for ac, what insulation materials you’ll need, and how to pick the right air conditioner for your camping trip.

Why Must You Insulate a Tent in The Summer?

While many people only think about insulation when winter camping, it is just as important in hot weather. Most tents are designed to let fresh air pass in and out fairly easily, so they don’t hold heat or cold well on their own. This can quickly lead to you overheating on an especially warm night.

Bringing an air conditioning unit and using other methods to keep cool can help, and might even be enough if it’s not too hot at night. However, adding proper insulation along with these will make the biggest difference in keeping your tent cool.

The Tent Insulation Process: Step-by-Step Guide

Below, we lay out the most comprehensive but doable guide to insulating your tent. While following all the steps will give you the best results, even using one or two of these tips will make a difference, so don’t be discouraged if you’re missing some of the materials.

1. Put An Insulating Sheet Under Your Tent

During the day, the ground absorbs the majority of the sun’s heat and radiates it back out at night. If your tent floor doesn’t have any way to stop this radiation, then the heat will come directly into your tent.

Therefore, you need some form of insulation under your tent or on the floor to stop this from happening. Many tents have a groundsheet included which can be used for this exact purpose.

If you don’t have access to a groundsheet, a neoprene or rubber sheet can be a great alternative. There are plenty of cheap options online that you can find for $20 or less.

When installing the sheet, make sure to first cut it to around the size of your tent bottom. Then you can lay it out flat over the floor on the inside of your tent. Use some duct tape or glue for added stability.

bottom tent sheet

2. Cover Your Tent With A Reflective Tarp

Most tents have a mesh roof or other open area to allow airflow. Covering this and the rest of your tent with a tarp will help keep the cool air from your air conditioner inside.

You should use a reflective tarp because it will reflect the sun’s rays rather than absorb them into your tent as a normal tarp would. Beyond reflecting the sunlight, a tarp will also stop any wind and water from getting inside and blackout your tent during the day.

When choosing a tarp, we’d suggest going for something high-quality and heavy-duty, as it will have many uses beyond just camping. Make sure it also has some metal grommets so it can be secured into the ground.

Once your camping tent has been set up, place the middle of your tarp on the roof and make sure it is spread evenly over the tent. Once you’ve done this, you can secure it in place by nailing some stakes into the ground through the grommets.

3. Optional – Insulate Inside of Your Tent With Thermal Blankets

While we don’t think this is necessary if you’re already using a reflective tarp, these emergency blankets can provide an extra layer of heat resistance or act as an alternative. Much like the tarps, they’ll reflect light and keep cold air inside of your tent.

If you’re using these in addition to a tarp, you can hang them on the inside of your tent walls. If not, put them on the outside of your tent to take advantage of those reflective properties.

Remember that, unlike the tarps, thermal blankets don’t have grommets or anything similar to secure them, so make sure to bring tape or a glue spray with you to secure them.

4. Apply Some Form of Vapor Barrier Lining

Controlling the humidity level plays a major part in keeping your tent cool. Unfortunately, while the above steps will do a great job of preventing heat and sunlight from entering your tent, it doesn’t do much for moisture.

This is why it’s a good idea to wrap a vapor retarder like polyethylene plastic sheets around the outside of your tent. It will help stop outside humidity from creeping in and keep your tent more comfortable. If the lining isn’t sticking on its own, you can spray adhesive to keep it attached.

5. Seal Small Leaks As Needed

Once you’ve implemented the steps above, all that remains is sealing up any minor leaks for a perfectly insulated tent.

Take a look around your tent and find any holes or places where air can flow through. The easiest option from here is to seal them up with duct tape. Once you do this, you’ll have a perfectly insulated tent.

insulated tent

Air Conditioning Your Tent – Potential Options

As mentioned in the intro, it doesn’t make sense to do any of this if you won’t be using an air conditioner inside of your tent. Without one, you’re better off letting fresh air from outside circulate into your tent, even if it will be a bit warm. Read below to learn about the best choices for a tent air conditioner.

Portable AC Unit

You likely won’t have very much space inside your tent, making the best air conditioning option a portable ac unit. If you can get it in the free-standing ac variety, it will save even more space as you won’t need a stand to go with it.

The setup for these units is also very simple. All you need to go with the air conditioner is a hose to drain heat and moisture from the tent. Keep in mind that you need to purchase this separately from the air conditioning unit, although it’s relatively inexpensive. Additionally, some units will be battery-powered, but you may need to bring a separate power source for others.

Some tents will have an ac port that makes it easy to filter this air out and maintain the best insulation. If your tent doesn’t have one, you can also run the hose through the door instead, although it’s a bit of a hassle to go in and out with this setup. The insulation also won’t be as effective as with an ac port.

portable tent ac

Window AC Unit

While not feasible if you’re camping with only a couple of people, a window ac unit is a good option for larger tents. These units are typically pretty heavy and are tougher to install, so we’d only opt for them if you’re camping in a 4-person tent or larger.

To set up a window ac, you’ll need to secure it inside the ac port on the tent wall (you need an ac port to use a window air conditioner) by stretching it around the unit. It will need a hose just like the portable air conditioner.

Make sure it’s secured tightly and no air is getting through. You’ll also need to support the window unit with an ac stand, as they’re not meant to sit on the ground. These will almost always need a separate power source as well.

window tent ac


Summertime is one of the most fun times of the year to go camping, but the experience can be easily ruined if you’re in especially hot weather. Using an air conditioner and insulating your tent properly makes it easy to stay cool no matter how bad the heat might get.

By following the guide we gave you above, we promise you won’t be having uncomfortable and restless nights in your sleeping bag anymore. If you have any other insulation methods that you’ve used for a summer camping trip, let us know in the comments below. Happy camping!


When do you need to insulate a tent for ac?

While the answer to this question varies based on how comfortable you are sleeping in the heat, any time where the nighttime temperature is above room temperature is appropriate. It would be smart to insulate if you’re sleeping in above 80 degree weather.

What type of power source do I need for my air conditioner?

While you should get a battery powered ac if possible, any 120 volt alternating current power source should work with a standard unit.

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