Well, that all depends - how much do you care if your house burns down, and are you stocked up on marshmallows (stored outside away from the house with some skewers) in case it does? Because while a well-built chimney does have two (or more) fire-resistant layers (double layers of brick, couble-wall steel, or steel with rock wool surrounding it), once you have a crack you not only risk flames penetrating it to combustible materials around the firebox, but also the risk of drafting through the crack carrying burning embers into the wall, or just enough heat penetration to cause combustion behind the firebox. Not a good scene in any case. 1997 Coleman Yukon Pop Up Specs. Any visible crack should be sealed - for tiny hairline cracks there are caulk tube repair sealants specifically for chimney fireboxes - you have to scrub out the crack and immediate surrounding area well with wirer brush and croesote solvent first, then force caulk into the crack.

HomeAdvisor's Fireplace Repair Cost Guide. Mortar repair. Jetbrains All Products Keygen Photoshop. Cracks are most prone to form. And Windows Electrical Panel Gas Line Installation Cost.

Many Chimney Sweeps do this sort of repair, as do Chimney Masons. For anything more than hairline, if a metal insert then sometimes it can be welded, sometimes has to be replaced. If masonry (firebrick) or concrete, then a Mason specializing in chimneys can gouge/cut out the crack to enlarge it enough for proper grout (if through-brick) or mortar (if in mortar joint) sealing. Sometimes a small crack at a corner in a metal-lined firebox is not a problem at all (if the side panels are made with interlocking joints) or are closed up by stuffing with rockwool (high-temperature fiberglass-like material using natural rock minerals that have replaced asbestos for this use). Most repairs of the types above, for a single crack or joint run in the $100-200 (maybe to 250 in higher cost areas) range. Be sure the repair includes inspection for additional unnoticed cracks - in the firebox or elsewhere on the chimney, because this may or may not be an indication of more extensive problems. Very commonly just an aging thing or erosion of the mortar due to heating and cooling, but you never know till you inspect.

General rule - crack confined to mortar joints usually not serious, especially if not traversing the wall for a significant distance. Cracking through bricks - almmost certainly indication of a structural support issue, or earthquake damage - occasionally due to freezing of water leaking down into/around chimney. Certainly, you should make a point of looking for the crack opening back up (or other cracks) each times before lighting a fire, and if cracking comes back or expands then you need a Structural Engineer to check out WHY it is cracking - likely structural settlement or distress.