It's not a legit concern, it's a selling point the salesman conjured out of thin air to make his commissions.
As with anything regarding improving a home, typically the biggest investment one can make - all I can tell people who are looking for the cheapest thing no matter what it is is that you're going about this all wrong.
As with anything regarding improving a home, typically the biggest investment one can make - all I can tell people who are looking for the cheapest thing no matter what it is is that you're going about this all wrong.
