Ground Cloths : A quick overview

Ground cloths are an item used for backpacking and camping that is often not thought about too much.  You buy a tent, get some sort of plastic to go underneath it, and call it good.  But is a a ground cloth really needed? Are there more choices beyond the expensive ‘tent footprints’ sold at your local outfitter or the ubiquitous blue-tarp sold at hardware stores?  There are indeed choices beyond these two standards that are lighter, less expensive and even more effective. If one is needed at all…. Read more to find out.

Is a ground cloth really needed for a tent?

There are many choices of the simple ground cloth to choose from. But, is one needed at all?

Conventional wisdom states that a ground cloth is needed to protect the floor from sharp rocks, sticks, stones and presumably Mole Men tunneling from beneath the tent and kidnapping unsuspecting campers.

 

Mole Men

Mole Men. More dangerous than grizzlies in the backcountry!

But consider that hundreds of thru-hikers put on thousands of trail miles every year. Many of these people do not use ground cloths in conditions ranging from the heavily wooded Appalachian Trail to the desert conditions of the Arizona Trail. The shelters used are lightweight and perhaps not as robust as the traditional tents that allegedly require the use of heavy and expensive “fitted tent footprints”. Yet these lighter shelters do not get punctured, ripped or torn (mainly ;) ). A little careful scoping out of a potential spot and pre-clearing rocks and brush does wonders.

Another reason many backpackers  advocate ground cloths is to keep out water.  It seems even the most carefully fitted ground cloth (a few inches smaller than the tent floor) will eventually get moisture in between the tent floor and the ground cloth. It will keep moisture in and cause  condensation and moisture to build up in the tent. Not good!

Rain

Slightly exaggerated view of what your tent may look like inside with too much moisture

So, in my opinion (and it’s just that, my opinion. Not a fact. ;) ), a ground cloth is not truly needed for the backpacker who takes a little care with their gear, choosing a site and clearing it appropriately.

So, when is a ground cloth needed?

There are times when a ground cloth is a good investment:

A backpacker that mainly “cowboy camps” and use a tarp 

For the backpacker that enjoys sleeping under the stars and only uses a tarp in inclement weather, a simple ground cloth is a good item to have. Throw it down, put your sleeping pad and sleeping bag on top and enjoy the night sky above.  The ground cloth will help protect and keep the dirt out of your sleeping bag and pad, help organize gear a bit and help protects the backpacker from any dew or ground moisture.

I meant something a little different when I say “cowboy camping”!

 

A backpacker that uses a floorless shelter

Some shelters such as the Tarp Tent and the Megamid do not have a floor for weight saving reasons. A ground cloth that is smaller than the total footprint of the shelter weighs less and serves the same function as the ground cloth for the cowboy camper above.

A backpacker or camper that beats on the gear and/or routinely camps in areas that will rough on a tent

Anyone who routinely beats on their gear, camps in areas that are not ‘gentle’ to tents (some established car campgrounds, very rocky soil, etc.) may indeed want to use a ground cloth to protect their tent

 

Please do not camp on this type of terrain.  A ground cloth will not help. Thank you.

Peace of mind

If someone is absolutely convinced a ground cloth is needed for their tent, that they probably should get it. They are not expensive and only add a few ounces.  All these ‘just in case’ gear items add up however….

I really need or want a ground cloth. What ground cloth should I buy?

If you absolutely decide you need or want a ground cloth for your style of backpacking, then there are a few popular choices.

I will add that if you use a ground cloth for a tent, be sure that it is 2-3″ shorter than the tent floor itself.  If it is too big, the ground cloth will collect any rain underneath the tent.

The Car Camping Standard – The Blue Tarp

The blue tarp. Seems to be found at every KOA campground, Boy Scout Jamboree and more than one minimalist backpacker has used it as a  shelter.  And why not? They are inexpensive, fairly light, fairly sturdy and versatile.

They might be overkill for the typical backpacker, however. There are lighter alternatives available. If you are going car camping, they are most useful for a sunshade, a make shift vestibule and other items around camp. Not a bad item to take for similar reasons if you are base-camping and don’t wish to spend the money on a more expensive tarp.  The blue-tarp also works well for a dirt-bagger shelter for a person on a budget. Probably would not use it for a ground cloth, though.

  • Use for : A backpacker on a budget, a versatile item if you are car camping or base camping

 

The Patagucci standard: The fitted footprint

These fitted tent footprints are sold at such stores as REI and EMS to protect your tent. Typically has shock cords or similar to hook directly into a specific tent, they are expensive and heavy (adds as much as 16 oz to an already heavy  shelter). Like the blue tarp, there are better alternatives.  Unlike the blue tarp, they are not cheap, they are not versatile and they have no really good use.

It comes with this really nice stuff sack however!

  • Use for:   For the backpacker who likes to spend money on un-need items. :)

 

A classic: Painters Drop Cloth (Polyethylene)

Another old warhorse that works well for those on a budget and wants something light that is still durable. (Depends on the thickness).  A thicker 6mil is bomber, but heavy.   A 2mil ground cloth is very light but not too durable.  The 3mil seems about right for a compromise between durability and lightness. .  An ~3′x7′ piece is 3 oz or so . Large rolls can bought if outfitting a lot of people (such as a Boy Scout troop).   A slight disadvantage is that the drop cloths do not breathe at all and condensation can build up underneath over the course of a night.

  • Use for: A very durable, lightweight and inexpensive solution that works esp. well for large groups

The new classic: Tyvek

A quick way of describing Tyvek is Goretex for housesTyvek keeps out the moisture and lets moisture escape. The  same properties of Tyvek that works well for housing also works well for a ground cloth.  Often found for free near construction sites (ask for some scraps!), it can also be bought online.  An approx 3′ by 7′ section is about 5-6 oz. (as always, cut down to make it lighter) Tyvek is fairly rugged and is fairly light. It is a nice compromise between weight, price and durability vs other items.

Tyvek

Cloth grade Tyvek that is often used for kites can also be bought online.  This Tyvek is not as stiff as the construction grade, stuffs into a pack easier and is not as noisy.  This type of Tyvek is not quite as durable and has a tendency to wet-out after a while. Still, it’s properties may be desirable vs the construction grade Tyvek of above.

  • Use for: The happy-medium between price, weight and durability for general backpacking and camping

 

For the ultra-lite hiker : Polycryo / Window Shrink Wrap Insulation

Polycryo and shrink-wrap Window Insulator are very similar and are both made from polyolefin. These choices of cloths are very light (less than half the weight of Tyvek!) and inexpensive.  Not quite as durable as the above, they are durable enough for those who use camp mainly for sleeping and not spending a lot of time in the shelter.   The main disadvantage is that polycryo has the same (minor) condensation problem as the painters drop cloth. The main issue is that  polycryo can also shrink in hot weather up to 2″ in width and 5″ in length. NOT suggested for very hot weather hiking. Probably does not apply to most people.

Windows Insulation

  • Use for:  The all-day hiker who wants the absolute lightest ground cloth that is still fairly rugged and will not be in very hot hiking conditions

 

 

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14 thoughts on “Ground Cloths : A quick overview

  1. What about standard construction Tyvek that is washed several times in the washing machine? I keep reading that it maintains all it’s properties, yet softens nicely? I wonder if it would hurt the machine in any way though?

    • No idea what it may do to a washing machine. Good question. I know people who have done it, though. Still slightly heavier than the kite grade, but more durable for sure. Cheers!

  2. While I agree that ground cloths aren’t very important for tents, I think they are pretty necessary if you are sheltering via tarp. Those plastic sheets & the blue tarp seem kind of bulky, I’m looking for something that will protect me a bit from gushing water and will definitely protect my sleeping pad from puncture and be lightweight. I’m mostly backpacking in Arizona where a punctured sleeping pad is commonplace.

    • Nothing will protect you from water but proper placement of a campsite I am afraid. :) as for punctures, that is why I use a foam pad. Cheers! If you want to get a ground cloth, a lightweight 2mil painters cloth is light and cheap.

      • HA! No I want a ground cloth that will let me camp IN the river! Ha ha. OK OK I’ll get some clear drop cloth. I think I already have some from my greenhouse project. Thanks

  3. After growing up in the middle of the rainy Adirondack Park and guiding around the world and throughout the Northeastern US, I believe the art of the groundcloth has been lost? The tarp needs to be at least 6 inches larger than the tent. The way to prevent surface runoff from getting between the groundcloth and the tent floor is to carefully fold the edge of the slightly over sized groundcloth underneath itself to make a rounded lip. This lip is what makes the water run under, not over the groundcloth. The folded lip needs to be just under the edge of the tent so that it is not folded down by gear inside the tent. Another good guideline is to be certain the lip stays under the fly and no portion of your groundcloth is exposed to weather. If it is, it will almost certainly become the headwaters of your camp’s newest river underneath your bed. Water will pour off your fly. If you’re in the monsoons, and the camping area is appropriate, make a small trench along the lip of your folded groundcloth to divert surface runoff. Be certain to fill in the trenches as a leave-no-trace rule. No other camper wants those lumps in the middle of their tent-floor layout. A good groundcloth folded properly should prevent any need for trenching. Try it!

  4. Great article!

    I have switched from tent camping to hammock camping (hennessey). It is a shade over 2 lbs, is comfortable, packs small, sets up in about 3 minutes, has no tent poles, is bug-proof, and it’s waterproof. Since you enter and exit the hammock from underneath it is nice to have a clean ground cover below to step onto (and for your boots/backpack/etc.). Just about anything small (say 3′ x 3′) and light weight is good for this purpose.

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