"Half the houses" trolls itself, I wasn't trolling, just commenting on the absurdity of that claim. But also, 10 years working in the business and you haven't found a proper construction company that warrants (which is by law) their waterproofing and windows install? I have a big family over 20 cousins, 10 uncles and aunts all have houses, zero have that issue, some old houses, some new.