Type Of Innerspring Mattress
Today there are many different types of spring mattresses on the market, so choosing a quality mattress is not easy. For a start, there are five different types of innerspring mattresses. If you know what they are and what materials are used to make a spring mattress, you can find the right spring mattress for you.
Over 90% of the mattresses sold are innerspring mattresses. Top class mattress manufacturers such as Serta, Jamison and Kingsdown Mattresses all produce innerspring mattresses. So there is a range of high quality innerspring mattresses to choose from.
Two good ways to determine quality are by interviewing the salesperson and looking at the mattress cross-sectional sample of the mattress – each mattress manufacturer provides a cross-sectional sample to their retailers as a guide for potential customers.
Okay, so you look at the pattern, but what exactly are you looking at?
Quality spring cores (so-called coils) are usually tempered with heat or electricity. This increases the probability that the coils will return to their original shape. Most quality coils are coated with plastic to resist corrosion and wear. In general, the thicker the metal, the stronger the carrier and the longer the coils last. The higher the thickness number, the thinner the wire. Most manufacturers of quality mattresses like Kingsdown use a 13 gauge wire.
There are five different types of coil systems used in mattresses: Continuous, Karr, Marshall, Knotted Bonnell and Knotted Offset. A continuous spool system is made from a single strand of steel wire stretched across the entire system. This system gives a mattress high strength. The Karr system consists of hourglass-shaped spools, the end of which remains unknotted. The main advantage of the Karr spools is that each spool moves independently.
The Marshall system uses very light wire. This is because this system uses many spools. This system is prohibitively expensive and is rarely used in the mattresses manufactured today. The knotted Bonnel system, like the Karr system, consists of hourglass-shaped coils, but each coil has five turns. The knotted offset is similar to the Bonnell system, but the difference is that part of the upper and lower wire sections are cut square to fit parallel to each other on the top. This prevents the mattress from sagging.
The number of coils is not necessarily a good indication that one mattress is better than another. Stearns and Foster make some of the finest mattresses available on the market today, but usually use fewer spools than other leading mattress manufacturers. However, most quality mattresses use somewhere between 700 and 1000 spools.
Nearly all major mattress manufacturers now cover their innerspring mattresses with a soft cover. This top layer can be upholstery, latex or memory foam. This layer can be 1 to 3 inches thick. It is this top layer that gives a spring mattress its soft feel, while the coils underneath provide the support.
One last point: When you lie or sit on a mattress, you should not feel any coils. A quality mattress from a leading mattress manufacturer such as Kingsdown should feel firm but yield and give your spine, pelvis and shoulders the support they need to help you sleep well.
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