There are tough requirements that must be met for a tombstone to be considered to be securely mounted. A securely mounted tombstone should be able to withstand that someone deliberately tries to overturn it, but at the same time be jerky. That is, it should feel a little loose when you put it on. Below we explain why it is so.
At Edurus, we work according to the rules that exist to ensure that our tombstones are safe. See link below to the regulations that apply for safe mounting of tombstone (In Swedish).
1. It is not allowed to glue the stone to the anchor downwards. This rule is set partly to allow the studs used in mounting to be checked afterwards. Another reason why the stone must not be glued is that it should be easily removable for possible future text completion / renovation or during re-digging.
2. Only approved foundations may be used for the secure mounting of tombstones.
3. The stud used for mounting must be stainless and have a definite dimension to the size of the tombstone.
4. The holes in the tombstone must have a diameter 2-4 mm larger than the diameter of the stud used and be at least 7 cm deep.
Newly installed tombstones are sensitive to bumps and movements
The newly excavated soil must settle and glue used downwards to the anchorage must be allowed to harden before the assembly is completely stable. The cemeteries themselves wait between 2-6 months before testing the stability of the assembly so that it will be completely stable before being tested. If you rock / shake the stone immediately after it has been mounted, you damage the mounting and risk getting a tombstone that is no longer secure.
If you feel unsure that your stone has been securely mounted, it is best to contact the cemetery staff so that they can perform a pressure test to ensure that the tombstone is secure.
There are a few different ways to mount tombstones.
The most common is the use of a lightweight concrete base called a GRO base.
In addition to this alternative, there are cemeteries that want stones to be mounted with ground studs, flexia or stone pedestals. In exceptional cases, the cemetery wants the stone to be cast with cement. However, this is very unusual.
Up in northern Sweden there are also cemeteries that have buried beams in the ground on which the tombstones are to be mounted.