About Chimney Liners, and fire safety

A flue lining in a masonry chimney is defined as “A clay, ceramic, or metal conduit installed inside of a chimney, intended to contain the combustion products, direct them to the outside atmosphere, and protect the chimney walls from heat and corrosion.” Although building codes vary from one state or locality to another, the installation of flue lining has been recommended since the early part of this century, and indeed most fire codes now mandate liners.


Liners in chimneys serve three main functions:

1) The liner protects the house from heat transfer to combustibles. In the NBS tests, unlined chimneys allowed heat to move through the chimney so rapidly that the adjacent woodwork caught fire in only 3 1/2 hours.

2) Liners protect the masonry from the corrosive byproducts of combustion. In the tests it was determined that if the flue gases were allowed to penetrate to the brick and mortar, the result would be a reduction in the usable life of the chimney. The flue gases are acidic in nature and literally eat away at the mortar joints from inside the chimney. As the mortar joints erode, heat transfers more rapidly to the nearby combustibles and dangerous gases such as carbon monoxide can leak into the living areas of the home.

3) Liners provide a correctly sized flue for optimum efficiency of appliances. Modern wood stoves and gas or oil furnaces require a correctly sized flue to perform properly. The chimney is responsible for not only allowing the products of combustion a passage out of the house, but the draft generated by the chimney also supplies the combustion air to the appliance. An incorrectly sized liner can lead to excessive creosote buildup in wood burning stoves, and the production of carbon monoxide with conventional fuels.


Here we see burned siding and framing on a home in NE Portland, photos taken during a chimney rebuild.

Chimney Repair


Recent Review

Online reviews are a bit of a holy grail for businesses, because they provide an objective view of a customer’s experience with that business. But getting a review isn’t always as easy as we would like it to be. Most people don’t think to offer a review, unless that company demonstrated service above and beyond what was expected.

That’s just one of the many reasons why we’re so proud of our customer reviews. Our customers have taken the time to write reviews on our behalf, because they felt as though the service we provided them was worth taking note of.  Here is what a recent customer had to say about us on YELP.

I had Cody, Zach, and Barry at my house for a few days removing a chimney that was in poor condition and no longer needed. Removing a chimney is a lot of hard work, but is a pretty straight forward process. The most important part of the job is sealing off the work area to prevent your entire house from being covered in dust. These guys did a great job with that and also cleaned up thoroughly once they were done.

Cody communicated with me throughout the process and when I mentioned some future renovations we have planned, he identified a way for me to save a little money on the chimney removal by not doing some work that would end up being replaced later. The whole crew was friendly and polite throughout the job. I wish I could hire them for different types of construction projects.

-Mark K.



Read it on yelp (And more), HERE!


Safety Meeting

Portland Fireplace and Chimney is all about safety, we snapped this group photo during our monthly safety meeting. We pre-plan for safety procedures tailored to each job to ensure the safety of our employees, and your home. Portland Fireplace and Chimney insists on attention to detail, which minimizes unforeseen circumstances and maximizes opportunities for the greatest cost savings. Our experience provides the foresight for more efficient processes. Our systems and field support give us the resources to continually meet challenges while exceeding client expectations. Give us a call to get your project started today! 503-758-4710