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I plan to paint my living walls. A large crack was hidden behind a vertical beam. the walls are made of straw covered with a thin layer of cardboard (construction of the 1970s). When I wear the cardboard blisters in small places; So I'm going to spend a s / acry layer and think cover these walls of "ENERGY RENOV SYSTEM" Do you know this product renovator surface said "THERMAL AMPLIFIER AND ACOUSTIC INSULATION", I do not risk the same drawbacks as with the sempata, that is to say joints that distance themselves and therefore cracks between them that appear and make the painting crack. THANK YOU for your response and congratulations for your great Saturday morning show!

The product cited can actually "bridge" the cracks and bring to an acceptable result, but the durability is not guaranteed if these cracks evolve.
Whatever the performance of these systems, they should not behave in "cache misery". If the support (straw + cardboard) is unstable and fragile, it seems more judicious to deposit it and leave on a healthy basis.
As for the thermo-acoustic effect of these products, their small thickness can not bring quantifiable improvement, except to avoid the phenomenon of cold wall and therefore the risk of condensation.

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