What a 2,000mm rating means
The rating in millimetres, the hydrostatic head, is the height of a column of water the fabric holds back before water comes through, tested to BS EN ISO 811. A 2,000mm fabric holds back a column of water two metres tall. Tents in this range are filed by their flysheet's rating, under 2,500mm; on these tents it runs from 1,000mm to 2,000mm. The groundsheet is often rated higher: the Archeos 3-person tent has a PU2000mm flysheet and a PU3000mm floor, and the TOMSHOO 2-person tent a PU1000mm rainfly and a PU1500mm groundsheet.
The tents in this range include:
- Pop-up tents and beach shelters, several rated 1,000 to 1,500mm, such as the hexagonal pop-up family tent for 3 to 6. See pop-up tents.
- Light camping and trekking tents: the OneTigris COSMITTO 3-season dome at 1500mm, a 2-person silnylon tent with a 1500mm flysheet, an ultralight trekking-pole tent with a 2000mm+ rainfly, and the ShineTrip tunnel tent at PU2000mm. See backpacking and trekking tents.
- Car tailgate and SUV tents, such as a tailgate awning tent with a PU2000mm flysheet and inner. See SUV and tailgate tents.
- Shower tents and a camping cot tent at 2000mm; the cot tent adds taped seams. See shower tents.
Is 2,000mm enough for British rain?
For a summer weekend on a campsite, with a few showers forecast, usually yes: 1,500 to 2,000mm is the usual range on lightweight flysheets. A long wet spell, heavy rain, or rain driven sideways by the wind is where a 2,000mm tent is tested, and below about 1,500mm a tent is a risk in heavy rain. Keep the tents here rated 1,000 to 1,500mm for fair weather, shade and the garden. For a week's holiday in Britain, or a pitch on open ground, look at waterproof to 3,000mm.
Seams, groundsheets and the rest of the tent
The rating is for the fabric. Water also gets in at the stitching, so taped seams, where a strip is sealed over each seam inside, matter as much as the number. The groundsheet takes more pressure than the flysheet, because you kneel and lie on it, so check its figure too: on the one-person camouflage tent here the flysheet is about 1500mm and the groundsheet about 1000mm. A footprint under the groundsheet protects it and adds a layer against wet ground. Pitch the tent taut with its guy lines out, so the flysheet does not sag onto anything inside: where fabric touches, water can wick through.
Questions people ask about waterproof ratings
Is a 2,000mm tent waterproof?
Yes, in the usual sense: about 1,000mm is the lowest rating usually called waterproof. It is the amount of rain, and how long it lasts, that decides whether it is enough.
Can I make a tent like this drier?
Put a footprint under it, pitch it taut, and in a heavy shower pitch a tarp over it. See groundsheets and footprints and tarps and tarp shelters.
How long does delivery take?
Delivery is included in every price and tracked to your door. Each product page says when that tent usually arrives, so check it before ordering for a set date.
More to look at