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Cast-In-Place Chimney Liners

If your chimney lining is too damaged for repairs – or if no lining exists in the chimney in your historic home – you may need to reline your flue. There are several options to consider, but cast-in-place chimney liners are seen as the most “permanent” option for chimney relining. And while this option doesn’t tend to be the least expensive, it has many benefits that can make it worthwhile.

How Cast-In-Place Liners Work

Installing a cast-in-place liner is a labor-intensive process, but the results are a long-lasting, seamless liner that can vastly improve the effectiveness of your chimney.

To install the liner, A-1 Chimney Specialist technicians will insert a former down the length of your chimney, before pumping the liner material — which is similar to concrete — in around the former. The former is removed once the liner sets, leaving a smooth liner that’s free of cracks, gaps or seams.

The Benefits Of Cast-In-Place Liners

  • You have several options when relining your chimney, but cast-in-place liners offer multiple benefits.
  • The material a cast-in-place liner is made of is extremely heat resistant, withstanding temperatures over 2000 degrees.
  • Cast-in-place liners seal any and all voids in your chimney, whether they are gaps, cracks or spalling. And any masonry that has become loose will bond together in the insulation process, becoming part of the new, strong and seamless liner.
  • The addition of a cast-in-place liner will actually add strength to your existing chimney, bolstering the bricks and mortar joints.
  • Unlike mortar or clay, cast-in-place liners are extremely resistant to the corrosion caused by byproducts of burning gas and oil.
  • Because the cast-in-place material creates a remarkably well-insulated liner, condensation and creosote buildup is reduced.
  • Since a cast-in-place liner is seamless, it is also highly effective at increasing the efficiency of your system overall.

If your chimney is in need of relining, a cast-in-place liner could be the right choice. Call to have an A-1 Chimney Specialist technician inspect your flue and help you figure out what option is best for you, or use our online scheduling form.


Another option for relining your chimney is stainless steel liners. Discuss the options with A-1 Chimney to see what’s best for your situation.

  • review rating 5  Great people to work with. Definitely the best choice for chimney services in the area! FM

    thumb Brandtastic Marketing
  • review rating 5  Great service! Due to unexpected doctor appointments, I had to reschedule two times and they worked with me to get it done as soon as possible. They were very prompt; the living area was left exactly as it was when they arrived (no mess at all!) and answered my questions. I highly recommend them!

    thumb Sally Edwards
  • review rating 5  In a time where customer service is becoming more infrequent than frequent , I have to take a moment to acknowledge the superb above and beyond service my husband and I received from A1 Chimney . First of all , we came to use this company several years ago when they sleeved our 100 year old house's chimney so we could burn real wood . We have used them regularly to check and sweep our chimney since. This year however , I had a chimney fire . Thankfully no damage was done . In looking at my records , I realized I hadn't had the chimney swept in a few years . BIG mistake on my part , hence the fire . So I called the company , sing my woes , asking if it would be possible for them to come out before Thanksgiving , this is less than 2 weeks prior by the way . Kind Marty lets me know the first availability isn't until 12/16 but he will do his best to see what he can do. He calls me back the same day to let me know he had jiggled some things around and could be out 12/13 . I thanked him but asked if there were any cancellations to please let me know. Kind Marty , let me rephrase , very KIND Marty , calls me back a couple of days ago asking if we could be free the Monday pre Thanksgiving . Absolutely , I reply . Well on Monday afternoon Preston and Robert leave after checking for damage , cleaning and confirming the sleeve did exactly what it is designed to do , protect the house in the event a chimney fire takes place , never once suggesting it wouldn't have happened if I hadn't waited 4 years . So THANK YOU all for doing such a wonderful job ! You have made us and my out of town family very happy in making it safe for us to enjoy this holiday with lovely fires , something we / they look forward to on their cold weather visits . May each of you have a very Happy Thanksgiving ! You've certainly made ours !!! Gratefully , Linda & Gill Ramsden

    thumb Linda Ramsden
  • review rating 5  A1 came out to sweep and inspect our chimney, as well as put a screen over the chimney opening. The guys that came out were fantastic!! They were so kind, friendly, and very professional. I was comfortable with them in my house, and they did a great job. They explained everything to me, and joked with my kids. We’ve already recommended them to other people and it’s only been 10 hours since their visit! We’ll definitely use them every time we need chimney services.

    thumb Laura Cole
  • review rating 5  I can't say enough good things about this company. The men came to clean our chimney (which badly needed it). They kept the house clean; they were so very polite; they took photos of the chimney. They also checked our dryer vent and took photos of that. We then learned that they service gas fireplaces--and we have been hunting for someone to help us with this. A lovely team. Super professional. It was like having the best doctor make a house call.

    thumb Elizabeth Grammer


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