Crumbling Mortar or deteriorating joints. Mortar holds the masonry of your fireplace together. Once you start to see the structure crumble, or the brick pieces no longer hold as firmly as they should, you’re looking at a problem that could degenerate into something worse. Have a chimney inspector check it out at once. Any deteriorating joints need to be replaced promptly as they could lead to the unexpected collapse of the chimney.
It would be prudent to schedule a regular gas fireplace service offered by chimney inspection and cleaning companies in Folsom, CA, like Chim Chimney. Don’t wait to take action at the first signs of a malfunction or potential breakdown.