take with you whatever ideas you have, be open, listen. Take a look at Liaplan on the internet, they build with the stones, we have Ultra08, advantages for us, no ventilation system, no cavity insulation, simply solid plastered inside and outside
It may not have occurred to some clients yet that there is such a thing as a reversal of the burden of proof even in a market economy, and that seller markets turn approaches upside down that one was used to from buyer markets. Times change. But you have now received some addresses here where you can proceed more cleverly on the further way.
To be honest, given the quality of your request for proposal, it would hardly be fair to attribute complaints about the quality of the offer to the provider. Reflect on that, improve the quality of your request (including better preparing the communication process), and only then draw conclusions from the quality of the offer you receive afterwards. Based on how you have requested so far and what the (also: not received) responses were, in my opinion you should proceed with the motto "let's move on" – this way you give a happy development a chance.Unfortunately with an offer that has significant gaps. Is this normal or can one deduce something about the company from the first offer?
Honestly, given the quality of your request for proposal, it would hardly be fair to attribute complaints about the quality of the offer to the provider. Reflect on this, improve the quality of your request (including better preparation of the communication process), and only then draw conclusions from the quality of the offer you receive thereafter. Regarding how you have requested so far and what the (including: not received) responses were, in my opinion you should proceed with the motto "let it go" – this way you give a chance to a positive development.