For rooms with a height of over 3 5 meters a higher flow temperature is required.
Radiant ceiling heat cracks.
Mesh will not help this problem as it does nothing the crack will travel through the mesh to the surface.
1 ceiling and walls are hung and finished electricians install ceiling cables after cables are installed 2 coats of a plaster product called radex is applied over the cables then a texture is applied.
In the older form electric heating elements are sandwiched between a layer of drywall and a layer of plaster.
Where ceiling heating makes sense.
Ceiling radiant heat is an interesting historical anomaly.
I owned a condo a few years ago with radiant ceiling heat similar construction timeframe i guess warm air fell in the 70s.
Low temperature ceiling heating can be used in rooms with a height of between 2 5 and 3 5 meters.
In fact the temperature variant from ceiling to floor is only about 1 c 2 f.
Radiant ceiling heat is a style of heating that is significantly different from the radiators or forced air ducts that you may be used to.
Radiant ceiling heat was real popular here in the 1970s there were 3 mehtods of installation.
Here the radiant heat can unfold in the best possible way with flow temperatures of between 26 and 40 c.
But unless you re really intent on period authenticity bus s suggestion is probably the right one install something more maintainable and more efficient.
A direct transference of clean even heat from object to object without fans pumps or hoses silent motionless and invisible.
We did not have any ceiling cracks but skim coating or texturing the ceiling if you avoid screwing anything in should work fine based on the experiences of others in our complex.
Btw i had something similar many years ago 2x4 radiant panels that dropped into my rec room s drop ceiling grid.