I would ask that they use 5/8" stainless steel screws and not penetrate the membrane on the curb only. Talk to a few different glass companies, or maybe you can provide the screws for them since most will only have the long ones (I think they are #8 course thread SS) https://www.fastenere.com/8-x-58-phillips-flat-head-wood-screws-stainless-steel-316-qty-100?device=c&network=u&keyword=&creative=507871761046&placement=&gclid=CjwKCAjwopWSBhB6EiwAjxmqDVasQXLeqDue4NWQBa9wCA5PzWVVK-oubb_PLEyA99DFg9g9LkG8KhoC2dwQAvD_BwE
I would ask that they use 5/8" stainless steel screws and not penetrate the membrane on the curb only. Talk to a few different glass companies, or maybe you can provide the screws for them since most will only have the long ones (I think they are #8 course thread SS) https://www.fastenere.com/8-x-58-phillips-flat-head-wood-screws-stainless-steel-316-qty-100?device=c&network=u&keyword=&creative=507871761046&placement=&gclid=CjwKCAjwopWSBhB6EiwAjxmqDVasQXLeqDue4NWQBa9wCA5PzWVVK-oubb_PLEyA99DFg9g9LkG8KhoC2dwQAvD_BwE