SQLit wrote:
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After a year I have the following problem, pieces of plaster (1+ inch
deep, 4"x5" on the surface) from vertical walls occasionally (every 4-5
months) fall off. The problem according to a contractor is the cement.
I think that's without doubt as the plaster falls of with a small piece
of cement always ( about 1/8" ) .

The reason for this was attributed to bad cement mix: The original
fault I was told was the addition of too much water to the mix. does
that sound plausible? provable? The gravel seems to be also a bit too
oblong, slits rather than rounded, but of medium/fine size.

The remedy is quite expensive, injections into the cement. But only
local treatment. Given the rather rare occurrences, and since I repaint
every 2 years maximum, does it really worth it? ( total house surface
1600sqf)

Other solutions
- total replastering ? ( with global cement treatment)
- glass fiber cloth ? ( on existing plaster, without cement
treatment)
- covering with prefabricated plaster on metallic trellis base, on
top of existing regular plaster.

Your ideas?

I could also pursue legal remedies but... am not sure what is best.
it's a bit of gutting experience.


Cement and plaster are two completely different applications.
Stucco does have cement in it. Stucco can chip and peal if improperly
installed. If you bought the home new use your warranty.

Plaster is typically used inside on very high end homes.

Your statements for me are confusing and hard to understand.

As I say it's an 12 year old house, and I have it for a year now.
no warranty I belive, still looking into it.

As for the problem I have, it appears on the load bearing walls only,
these walls are made of reinforced concrete (with gravel & cement ok,
my mistake).

The walls are plastered on top of the concrete, it's an above average
but not really high end home.

So a chunk of plaster falls off, with a small piece of the concrete
attached.
As if some stresses in the concrete act to expell the surface part of
concreet.
Is it clearer now? not a common problem right?