Does the Wide Chimney on Your Columbus, IN Roof Need a Cricket?

If your chimney measures more than about 30 inches across the uphill side, it almost certainly needs a cricket, and many Columbus roofs with wide chimneys never got one. A cricket is a small peaked structure built behind the chimney that splits rainwater and sends it around both sides instead of letting it pile up against the brick. Without one, water, leaves, and snowmelt stack up on the uphill face and work their way under the flashing.

That is the short verdict. The rest comes down to how wide your chimney is, what is happening at the roofline now, and whether to address it during a repair or wait for a larger project.

What is a chimney cricket, and why does a wide chimney matter?

A cricket, sometimes called a saddle, is a ridged wedge of framing and flashing behind the high side of a chimney that diverts water around it. Its whole job is to keep the uphill face of the chimney from acting like a dam in the middle of your roof slope.

Here is the problem a wide chimney creates. Rain and melting snow run down the slope and hit the back wall of the chimney. A narrow chimney, say 16 inches across, lets that water slip around the sides quickly. A wide one, 36 or 48 inches across, gives the water nowhere to go. It pools, finds the seam between brick and shingle, and sits there. Leaves and pine needles collect in that same low spot, hold moisture, and speed up the breakdown of the flashing and the decking underneath.

How wide does a chimney have to be before it needs a cricket?

The common rule of thumb, and the one most building codes follow, is that any chimney wider than 30 inches measured across the slope should have a cricket. Below that width, well-sealed step and counter flashing usually handles the water fine.

Measure the side of the chimney that faces uphill, straight across, not the taller front face. A realistic example: say a homeowner in the Parkside or Everroad Park area has a chimney that reads 42 inches across the back. That is comfortably over the threshold, and if the roof has no cricket, water has been collecting behind that brick through every storm for years. A chimney closer to 24 inches, by contrast, is usually fine with sound flashing and no cricket at all. The wider the chimney and the steeper the slope above it, the more a cricket earns its keep.

What goes wrong when a wide chimney has no cricket?

When a wide chimney has no cricket, water repeatedly ponds against the uphill brick, overwhelms the flashing, and eventually rots the roof decking behind the chimney. The damage builds slowly, so it often shows up as an interior stain long before anyone spots the cause outside.

The usual chain looks like this. Standing water and trapped debris keep the flashing wet, the sealant at the top edge dries and cracks, and water slips behind the counterflashing. From there it soaks the decking and framing on the high side, and you may see a brown stain on the ceiling near the chimney or feel soft spots if someone walks that area. By the time it is visible indoors, the fix has often grown from resealing flashing into replacing wet decking too. This is the same water path we describe in our walkthrough of how flashing gets resealed behind a chimney, just made worse by the missing diverter. Catching it early is far cheaper, which is why a roof repair visit on an aging wide chimney is worth scheduling before winter.

Cricket, better flashing, or a full reflash: how do you decide?

Decide by matching the fix to what is actually failing: reseal flashing if the metal is sound and the chimney is narrow, reflash fully if the flashing is corroded or poorly installed, and add a cricket if the chimney is wide and water keeps pooling no matter what the flashing looks like. These are not either-or choices. A wide chimney often needs a cricket built in the same visit as new flashing.

A simple way to think it through:

• Narrow chimney, flashing intact, minor leak. The crew reseals the counterflashing and replaces cracked sealant. Lowest-cost path, no cricket needed.
• Any chimney, rusted or face-nailed flashing. The roofer strips and reinstalls proper step and counter flashing. Still no cricket if the chimney is under 30 inches.
• Wide chimney, repeated pooling or decking damage. The right fix is a cricket plus fresh flashing, so the water is diverted instead of just sealed against. Sealing alone here tends to fail again within a few seasons.

If you are already planning shingle work, folding a cricket into that project is the cleanest approach. It is also worth asking about when you compare material options, since a cricket gets flashed and shingled to match whatever roof you choose, whether that is architectural asphalt or metal.

Should you add a cricket during a repair or wait for a roof replacement?

Add a cricket as soon as a wide chimney shows signs of pooling or leaking, even if the rest of the roof has years left. Waiting for a full replacement only gives the water more time to rot the decking behind the brick.

That said, timing matters for cost. If your roof is already near the end of its life, say a 20-year-old shingle roof with curling and granule loss, bundling the cricket into the replacement avoids paying twice to open up the same area. If the roof is healthy and only the chimney area is failing, a standalone repair with a new cricket makes more sense. A quick inspection settles it, and you can always get matched with a local roofer for a free look before committing either way. For context on what a larger project runs, our Columbus roof replacement cost guide lays out the ranges.

Frequently Asked Questions

My chimney has never leaked, so why would I spend money on a cricket now?

Wide chimneys without crickets often go years before the damage surfaces indoors, because water rots the decking from the top down before it ever reaches a ceiling. If your chimney is over 30 inches wide, a no-obligation inspection can tell you whether water is already collecting back there, well before a stain appears.

Can’t the roofer just use more sealant instead of building a cricket?

Extra sealant on a wide chimney treats the symptom, not the cause. The water keeps pooling, and sealant on a flat uphill seam typically dries and cracks within a few Indiana freeze-thaw cycles. A cricket removes the standing water entirely, which is why it holds up where repeated resealing does not.

Does adding a cricket mean tearing off my whole roof?

No. A cricket is built into the area right behind the chimney, so the crew opens up only that section, frames the small peak, flashes it, and shingles it to match. It is a localized repair unless the surrounding decking is already rotted or the roof is due for replacement anyway.

Not sure whether your chimney is wide enough to need one? A quick measurement and a look at the flashing will tell you, and you can ask a local roofer to check it during a routine inspection before the weather turns.