Santa's Friend Chimney Service

Your Chimney Liner’s Job

Your Chimney Liner Is An MVP

A chimney liner’s name doesn’t necessarily accurately convey the heavy lifting it does, or its supremely important role in your chimney system. We usually think of liners as add-ons — the shelf liners in our cabinets make things look a little cleaner, our jacket liners make things a little more comfortable, but it is different with chimney liners. If the chimney industry was going to be a little more clear about the importance of the chimney liner, we might call them chimney suits of armor for their protective properties, or chimney foremen for how they make the system work well.

The Chimney liner defends the exterior of your chimney wall from too much heat.

The Chimney liner defends the exterior of your chimney wall from too much heat.

Overall, from the vantage point here at Santa’s Friend Chimney Service, a clean, strong chimney liner is definitely an MVP.

What Your Chimney Liner Does

If we were to boil it down, the chimney liner was developed to solve three key problems with chimney systems: the heavy wear-and-tear of heat and moisture on masonry; the susceptibility of building materials behind that masonry to heat and moisture; and the impeded draft that comes with inconsistencies in damaged flues.

First, your chimney liner provides protection. Whether your liner is made of terra cotta clay or stainless steel, it stands up to heat from your fire and potential moisture intrusion, allowing the masonry that makes up your chimney itself to stand stronger, longer. It also provides a needed extra layer of protection between the flammable beams and building materials in your walls behind the chimney, lessening the chances of a fire hazard.

Protection is just part of the chimney liner’s role, though. The liner also contributes immensely to performance, and draft. Air needs to flow smoothly up and out of your flue for the chimney to properly vent. If you think of your flue kind of like a straw, you’ll get a sense of why “smoothly” is so key. If you try to use a cracked straw, the pressure necessary to draw up becomes near impossible to create. The same kind of thing happens when cracks or gaps are present in your flue. A smooth, properly sized and intact flue liner creates a surface that encourages draft, and makes your chimney work more efficiently. (That’s part of why it’s so important to maintain your flue liner too, and to have damaged flue liners repaired or replaced as soon as possible.

A Flue Liner’s Size Is Important

A damaged clay tile liner is often the reason why Santa’s Friend Chimney Service technicians end up relining a chimney. But damage isn’t the only thing we look for when we’re inspecting a chimney system. A chimney needs to have a clean and intact liner in order to function correctly, but that liner also needs to be the right size. A flue that’s too big or too small for the appliance it’s venting will result in poor draft, increased byproducts and other issues.

To resize an incorrectly sized flue, we’ll install a stainless steel liner. These are great products that will last through years and years of use (when installed by a professional, most carry lifetime warranties).

If you have any questions about what a flue liner does, or what the process of relining or liner repair is like, Santa’s Friend is always willing to help. Give us a call with any questions, or to book an appointment with our experienced technicians!