Glass Block Window Repair ((better)) Here

If you have a single hairline crack, keep an eye on it. If you have a major leak or a shattered block, weigh the cost of a specialized masonry repair against the cost of a modern, energy-efficient replacement panel. Often, replacing the panel is faster, cheaper, and results in a better seal than trying to patch an aging window.

If blocks are solid but joints are crumbling: glass block window repair

When internal steel reinforcement rods rust and expand, they put immense pressure on the blocks, causing them to crack. Step-by-Step Guide: Replacing a Single Glass Block If you have a single hairline crack, keep an eye on it