We are wanting to replace our below grade basement windows with glass block (our window wells fill with water--bottom up and leak through the slider windows that are there.) We have gotten a couple of estimates. One said they just use mortar and is half the price of the other. The other says they use mortar and come back and remove some of it on the outside. Then they apply a sealant of some sort which allows for movement of the foundation and prevention of cracks in the mortar, emphasizing this is important for below grade installation. I would like to know if this is really necessary and worth paying double.
We orginally tried to dig out the well some more to try to prevent leakage but were not successfull.
Any ideas would be greatly appreciated!