Shortly after the invention of cement tile makers discovered they could stain this material to create cement roofing tiles which resembled clay tiles 2 cement resisted water better than clay.
Glazing roof tiles.
The process of tile glazing is comparable to a dentist visit for your roof.
1 an important innovation.
For diy projects you need to make sure the glazing compound is compatible with what it s being used on.
Especially in places where it rains often tile glazing can help to seal out water and maintain the color of your roof in spite of the elements.
So in the minds of zch the roof is now all glazing and so the roof will overheat as well as the rooms below.
The glazing process helped color the tiles.
Unglazed tiles tend to be denser and thicker than glazed tiles and because of their unfinished exteriors they tend to be a great choice if you re looking for a slip resistant surface in an area like a laundry room or kitchen where the tile is likely to be subjected to high amounts of moisture.
But your roof was overheating already despite the opaque tiles.
Twitter had a tweet about glass roof tiles available from sweden asking what would you do with all that free heat the obvious answer is overheat.
It also offered an extra level of protection against water damage.
Reglazing is recommended for certain surface tiles including ceramic tile cultured marble fiberglass porcelain tiles and some laminate tiles.
How to glaze an old tiled bath.
In terms of safety this is a big consideration.