Measuring Clay Tiles for a Stainless Steel Chimney Liner Install

Clay Tiles

One of the most common questions asked is: "Will my round stainless liner fit into my chimney that has clay tiles?"

Sounds easy, right? Here are the real facts. All clay tiles are measured roughly by their outside dimension.

The most common square and rectangle clay tile sizes are - 8" x 8",  8" x 13",  13" x 13",  13" x 18".

For an 8" x 8" clay tile it will roughly have an 8.25" x 8.25" outside dimension with a 6.5" x 6.5" inside dimension. The clay tiles are approximately 1" thick, but all tile sizes vary so you must take accurate measurements. All stainless flex liners, use inside measurements, and are a 1/4" larger on the outside.  A 6" flex liner will be 6.25" on the outside.

Let's say you needed a 6" liner, sized correctly, should fit through the clay tile if it measured 7" x 7" on the inside dimension. The problem is that the clay tiles may or may not be sitting exactly on top of one another. In addition, the mortar that holds them in place squeezes to the inside of the tiles, reducing the clearance for the stainless steel liner. When that happens, the clay tiles usually need to be broken up and removed.

There are a number of different styles of Tile Breakers. The rotary style Tile Breaking Tool dramatically speeds up the process of removing clay flue tiles. The weighted tile breakers spin in eccentric circles and will work effectively to break up clay flue tiles so they can be removed. As you break the tiles up, you would remove them from down below in the fireplace or through the clean out door in the basement.

Related Articles

Stove & Insert Chimney Liner Measurements Form

Gas or Oil Chimney Liner Measurements Form

DIY Center

(AKA ‘The Rockford Files’)

From video tutorials to product walkthroughs, we have a variety of DIY resources just for you! Click the button below to view our entire library.

START LEARNING

Need Help?

We are here to answer all of your questions

1-866-708-2446

OR

CONTACT US

Our 316Ti flexible chimney liner and chimney liner components have passed the rigorous testing at the Underwriters Laboratories with best in class status and are UL Listed. So if you are looking for UL listed chimney liner sold directly to homeowners, then look no further than Rockford Chimney

Customer Testimonials

Back in July you gave me excellent advice re. sizing/purchasing a flue liner for the chimney associated with my wood stove. I'd like to thank you once agai... More

—AE Northfield, MN

A few weeks ago I ordered a chimney liner system for my fireplace insert. Your salesman recommended the liner system plus the insulating blanket. I just wa... More

—AH Happy customer

Just got around to installing my new smooth flexible liner and deluxe terra cotta cap (wow). The quality of your product is second to none. Very pleased an... More

—B.B. from Massachusetts

Thanks so much for the great tech service from Dennis, very knowledgable, friendly and proffessional.Your website is the best, beats your competition by fa... More

—Bill in Knoxville

Sue and Dennis, I received the final part of my order yesterday (the chimney cap that actually fits over the chimney chase). It looks wonderfu... More

—CC, VA

Hello, I was shopping for an fireplace insert and called RCS to ask why they were so much cheaper than my local guy, the reply was " we sell thousand of th... More

—Chris, PA.