[santa]

I am renovating a house, the previous owners used the fireplace often. The mortar between some of the bricks has broken away. Is this a simple repair, and what type of mortar should be used.

[ballengerb1]

Is the firebox lined with refractory brick or common brick? Refractory brick is much flatter, smoother larger and alomost no mortar line at all.

[santa]

I am renovating a house, the previous owners used the fireplace often. The mortar between some of the bricks has broken away. Is this a simple repair, and what type of mortar should be used.

I believe the brick is common brick and not refactory brick.

[ballengerb1]

If the box is made of common brick your problems will continue but a refractory mortar will help. If there is room in the box you could line it with refractory brick with almost no mortar line.