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Outdoor Shelters Review. Materials And Types

Tents range in size from one-person "bivouac" structures for a hiker to sleep in to huge tents capable of seating thousands of people. The bulk of this article is concerned with tents used for recreational camping which have sleeping space for one to ten people. Larger tents are discussed in a separate section below.

Tents for recreational camping fall into two categories. Tents intended to be carried by backpackers are the smallest, lightest, and most expensive type. Smaller tents may be sufficiently light that they can be carried for long distances on a touring bicycle, a boat, or even a person's back. Some very specialised tents have spring-loaded poles and can be 'pitched' in seconds, but take somewhat longer to strike.

The second type are larger, heavier tents which are usually carried in a car or other vehicle. Depending on tent size and the experience of the person or people involved, such tents can usually be assembled in between 5 and 25 minutes; disassembly takes a similar length of time. The military organisations of most nations use tents to temporarily house troops living and working under field type conditions.

General considerations

Tent fabric may be made of many materials including cotton (canvas), nylon, felt and polyester. Cotton absorbs water, so it can become very heavy when wet, but the associated swelling tends to block any minute holes so that wet cotton is more waterproof than dry cotton. Cotton tents were often treated with paraffin to enhance water resistance. Nylon and polyester are much lighter than cotton and do not absorb much water; with suitable coatings they can be very waterproof, but they tend to deteriorate over time due to a slow chemical breakdown caused by ultraviolet light. The most common treatments to make fabric waterproof are silicone impregnation or polyurethane coating. Since stitching makes tiny holes in a fabric, it is important that any seams are sealed or taped to block these holes and maintain waterproofness.

Rain resistance is measured as a hydrostatic head in millimetres (mm). This indicates the pressure of water needed to penetrate a fabric. Heavy or wind-driven rain has a higher pressure than light rain. Standing on a groundsheet increases the pressure on any water underneath. Fabric with a hydrostatic head rating of 1000 mm or less is best regarded as shower resistant, with 1500 mm being usually suitable for summer camping. Tents for year-round use generally have at least 2000 mm; expedition tents intended for extreme conditions are often rated at 3000 mm. Where quoted, groundsheets may be rated for 5000 mm or more.

Many tent manufacturers indicate capacity by such phrases as "3 berth" or "2 person". These numbers indicate how many people the manufacturer thinks can be fit snugly into a tent with just sleeping bags. These numbers do not allow for any personal belongings, such as luggage, inflatable mattresses, camp beds, cots, etc., nor do they allow for people who are of above average height. Checking the quoted sizes of sleeping areas reveals that several manufacturers consider that a width of 150 cm (5 feet) is enough for three people — snug is the operative word. Experience indicates that camping may be more comfortable if the actual number of occupants is one or even two less than the manufacturer's suggestion.

If the tent will be used where mosquitoes, gnats and other biting insects are expected, it should have all window, vent and door openings covered with fine-mesh "no-see-um" netting.

Tents can be improvised using waterproof fabric, string, and sticks. This allows them to be easily built and moved.

Article Source: http://articleaddict.com

At Barretts you can still find equipment Tent & waterproofs, but now we offer a broad range of products to cater for any outdoor enthusiast.

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