Some older mortar beds have wire mesh underneath.
Floor mortar and wire mesh.
Mortar beds are still practical and advantageous as shower floors where the built up surface is not usually a problem and the floor needs to be sloped toward a drain.
To strengthen the floor in the apartment an excellent mesh of fiberglass or galvanized wire with a diameter of 4 mm with cell sizes of 100 x 100 mm or 150 x 150 mm is ideal.
To resist breaking apart and deteriorating when the slab eventually does crack to increase flexural strength of the slab.
You might have to replace some of the wood.
Stucco rite double paper lath 28 x 102 stucco rite double paper 16 gauge zinc coated galvanized welded wire fabric lath 2 x 2 mesh with slot perforated absorptive separator paper between face and back wires complies with ansi a42 3 c841 c933 and federal specifications qq w 461g and qq l 101c.
I didn t use any mesh because the tile shop s video which i was using as a guide didn t suggest wire mesh.
This goes back to the day when metal lath was nailed to all the studs in the house and then plaster was applied to that to create the walls.
For wood subfloors make sure it s solid.
Also another situation where wire mesh can offer benefits is when a poor or weak subgrade exists and may be expected to move.
A number of companies offer electric resistance floor warming systems.
Cover the seams with mesh fiberglass tape and thin set to create a unibody floor.
Wire mesh is commonly placed in concrete slabs for two primary reasons.
It should pull up with the mortar.
Removing wall tile mortar and mesh can range from hard to very hard.
Snap chalk lines on the floor to mark the tile layout.
Laying a mortar bed involves building up a slab of concrete mortar with wire mesh embedded in the middle.
The best option is purchase mesh with small cells and thick wire.
1 1 2x2 inch x 16 13 wire.
If the mortar bed cracks are large you should remove it.
Trowel on a layer of thin set mortar then secure the cement board with cement board screws.
The plaster could be from 1 2 inch to an inch or more in thickness.
But based on my experiencing doing concrete floors i know that mesh laying flat on the ground doesn t do anything.
When i set tile using this method i ll dump about half the mortar on the floor lay the wire mesh on top of that then spread the rest of the mortar.
Use a hammer and chisel to open up the crack then chip away.
This would be the case of the shower pan since no mortar would be under the mesh.
When using wire mesh and mud also known as mortar you eliminate the need for concrete backer board or luan underlayment.
If your floor has any low spots use a self leveler.