The body takes between ten to fifteen years to decay to a point where you may just find bones, teeth and hair remaining in the casket. There may also be some excess tissue and clothing fibers that withstood the ten years of decay.
By ten-years, given enough moisture, the wet, low-oxygen environment sets off a chemical reaction that will turn the fat in the thighs and bottom to a soap-like substance called grave wax. However, in drier conditions, the body could also be mummified – that's mummification without wrappings, or chemicals.
However, on average, a body buried within a typical coffin usually starts to break down within a year, but takes up to a decade to fully decompose, leaving only the skeleton, Daniel Wescott, director of the Forensic Anthropology Center at Texas State University, told Live Science.
By 50 years in, your tissues will have liquefied and disappeared, leaving behind mummified skin and tendons. Eventually these too will disintegrate, and after 80 years in that coffin, your bones will crack as the soft collagen inside them deteriorates, leaving nothing but the brittle mineral frame behind.
How long does a coffin last? There is no coffin or casket that will last forever. Bronze or copper caskets will tend to last longer but they will also break down over time, bronze will last the longest though. On average, the casket will last to about as little as 5 to 20 years or as long as 80 till 125 years.
The rate at which this occurs varies depending on the type of casket, the elements in the soil, and its condition. Typically, wooden coffins may take a few years to collapse after being buried, while metal ones are more resistant and can last longer.
Coffins are not watertight so when the grave fills with water it also fills the coffin, which decomposes and rots the bodies faster.
It is a common practice to cover the legs as there is swelling in the feet and shoes don't fit. As part of funeral care, the body is dressed and preserved, with the prime focus on the face. Post embalming, bodies are often placed without shoes; hence covering the legs is the way to offer a dignified funeral.
As you can see most funeral homes can hold a body indefinitely – but there will likely be holding fees. So, if you can you should speed the process up by finding a reliable funeral home that can deal with the paperwork.
Capacity of the grave
Graves can be for a maximum of three full earth burials, depending on ground conditions in the cemetery. The depth has to be determined with the first burial. In a dedicated cremation plot, designed solely for cremated remains, ten caskets can be interred.
Stage 3: Putrefaction - 4 to 10 days after death
They often respire in the absence of oxygen (anaerobically) and produce various gases including hydrogen sulphide, methane, cadaverine and putrescine as by-products. People might find these gases foul smelling, but they are very attractive to a variety of insects.
So what happens to the body in casket after 2 months? After bloating, it enters the 3rd phase, or 'Active Decay,' where organs liquefy. The body will lose mass, slowly revealing the skeleton. If you open the casket of a non-embalmed body, it will be more decomposed than an embalmed body in a few months or years.
After a few weeks, nails and teeth will fall out. After 1 month, the liquefaction process commences. During this stage the body loses the most mass. The muscles, organs and skin are liquefied, with the cadaver's bones, cartilage and hair remaining at the end of this process.
3-5 days after death — the body starts to bloat and blood-containing foam leaks from the mouth and nose. 8-10 days after death — the body turns from green to red as the blood decomposes and the organs in the abdomen accumulate gas. Several weeks after death — nails and teeth fall out.
(Note: If you're buried alive and breathing normally, you're likely to die from suffocation. A person can live on the air in a coffin for a little over five hours, tops. If you start hyperventilating, panicked that you've been buried alive, the oxygen will likely run out sooner.)
Once a body is placed in a sealed casket, the gases from decomposing cannot escape anymore. As the pressure increases, the casket becomes like an overblown balloon. However, it's not going to explode like one. But it can spill out unpleasant fluids and gasses inside the casket.
A body may be different in death to life because:
a mortician or funeral director has changed a body's appearance through clothing, or hair arrangement, or cosmetics. Such “dressing” of the body may be very different to how the person in life would have done it. the body smells different.
A body presents little threat to public health in the first day following the death. However, after 24 hours the body will need some level of embalming. A mortuary will be able to preserve the body for approximately a week. Regardless of the embalming, decomposition will begin after one week.
OPEN-CASKET FUNERAL ETIQUETTE
If they have an open casket viewing, make sure you follow proper funeral etiquette: DON'T touch the body under any circumstances. Sometimes the casket has a glass to prevent this from happening.
It has been used to prevent the odor of decay, to give family members closure and prevent them from witnessing the decomposition of their loved ones, and in many cultures it has been seen as a necessary step for the deceased to enter the afterlife or to give back to the cycle of life.
We don't remove them. You can use what is called an eye cap to put over the flattened eyeball to recreate the natural curvature of the eye. You can also inject tissue builder directly into the eyeball and fill it up. And sometimes, the embalming fluid will fill the eye to normal size.
A rather large overstuffed pillow is included in the interior package of a finished casket. This pillow helps to hold the decedent in an inclined position. This position helps present a naturally comforting presentation to the survivors.
The deceased's face is sometimes covered before the casket is closed to protect it from the inside lid of the casket. If the face does not need protection, it may still be covered at the funeral as a gesture of comfort, out of respect for the body, or due to Catholic tradition. That's the short answer.
Coffins get tapered to conform to the shape of a human form. A coffin also has a removable lid while caskets have lids with hinges. Coffins are usually made out of wood and lined with cloth interiors. Unlike caskets, they do not have rails that make transportation easier.