Chimney Flashing Repair Service

Flash Seal is a versatile and easy-to-use product specially made to repair flashing (the sheet metal or other material that covers and protects the joint at which a roof intersects a chimney). Once applied, the Flash Seal fluid dries to become a flexible, waterproof membrane. It’s formulated for permanent adhesion to asphalt shingles, metal flashing, brick, and other chimney and roofing materials. Use Flash Seal to solve problematic leaks around the base of chimneys, stacks, and vents. We also recommend using it for sealing around skylights.

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This Is What You Need to Repair a Bad Flashing

With Flash Seal, it’s easy to repair a flashing that has been tarred over, split, or cracked. Have a Midtown Chimney Sweeps technician apply what is basically a custom-fit rubber boot at the base of your chimney! It will be permanently flexible and has a 7-year warranty when used with Flash Seal Reinforcement Fabric.

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Qualified

Our chimney sweeps are qualified and insured.

Local

Our local chimney technicians know what works best for your specific area.

Professional

Our sweeps treat your home like it’s their own.

Happy Customers

Midtown Chimney Sweeps is rated 4.9/5.0

Excellent
Midtown Chimney Sweeps4.9
Based on 2217 reviews
JS
3 days ago
Eric Lomas
1 week ago
Mike and Alice are very personable and have been super helpful every step of the way. My wife and I were looking to upgrade a faulty, unusable gas fireplace in our family room and, with great guidance from Mike and Alice, we picked a wood burning stove insert from Regency. Mike has come by multiple times to make sure we are comfortable with its use and has had great tips and tricks for getting the most out of our fireplace. We are very happy with the work and the service we have received. I highly recommend working with them! They give you quality work and stand by it.
Chris Shepard
2 weeks ago
Great company to work with. Extremely knowledgeable, helpful and did tremendous work on our chimney and chase cover.
Response from the owner:Thank you very much Chris for your review of our wood stove and chimney chase installation process!
- Byron at Midtown Chimney
Marcus Hill
3 weeks ago
Mike was the best, he did a great job. Honest and straightforward guy, will be working with them going forward!
Keelin Glennon
3 weeks ago
Byron is a nice sales person!
Terrance Savill
3 weeks ago
These guy are the best to work with Kurt! We’ve been collaborating together with our stone mantels to quite awhile now and will always recommend. Their inspection and sweeping services are second to none. We’re more than happy to refer them to them in the Hillsborough, New Brunswick, and Edison area.
These guys replaced our chimney liner a few years ago. 5 star review for their services.
⭐⭐⭐⭐⭐
I couldn’t be more pleased with the outstanding job done by Midtown Chimney Sweeps. From start to finish, the entire experience was professional, organized, and truly customer-focused.
Jody and Christopher were absolutely exceptional. They were prompt, punctual, and extremely professional—while also being personable and easy to communicate with. From the moment they arrived, they treated my home and personal space with complete respect. Before any work began, they carefully prepped the area, covering floors, rugs, furniture, and the entire workspace to ensure everything was fully protected. Their attention to cleanliness and detail immediately gave me confidence.
The project took place over two days, and throughout that time they remained focused, diligent, and hardworking. They kept me informed every step of the way, clearly explaining what they were doing and what to expect next. Their proactive, customer-first communication style made the entire process smooth and stress-free. I always felt up to date and fully aware of the work being performed.
Even though chimney cleaning and repair can naturally involve dust, noise, and odors, Jody and Christopher went above and beyond to be as minimally intrusive as possible while still working efficiently and effectively. They created a work environment that felt organized and controlled, and I was completely comfortable having them in my home. In fact, I felt at ease stepping away and going about my day with total peace of mind, knowing the job was in capable hands.
When the project was completed, they didn’t just pack up and leave—they carefully cleaned, vacuumed, and ensured everything was left spotless. Their craftsmanship, expertise, and pride in their work were evident in the superior final result. The repair and cleaning were done to an exceptional standard, and the finished product exceeded my expectations.
If you’re looking for reliability, punctuality, professionalism, outstanding attention to detail, and true craftsmanship, I highly recommend Midtown Chimney Sweeps—especially Jody and Christopher. I am extremely happy with the service and wouldn’t hesitate to use them again.
Response from the owner:Patrick thank you so much for the kind words about our chimney and fireplace restoration repair technicians Christopher and Jody at Midtown Chimney Sweeps Fireplace store in Boulder!

Chris and Jody are both second generation technicians in masonry and Sheet Metal and I couldn't have a better duo.

- Byron, Midtown chimney

Lisa Guignard
4 weeks ago
Kurt took our fireplace from totally unusable .. to a wonderful working fireplace. He is a master at his job. A true craftsman. Our home is over 100 years old. We bought the home because we wanted a fireplace. However whenever we lit a fire, even a duralog. Our home was filled with a smoke smell. Kurt restored our fireplace to perfection. He is always there for you. Answers any questions. You cant find any person more qualified than him
Response from the owner:Thank you so much, Lisa, for your wonderful review! We're thrilled to hear that Kurt was able to transform your fireplace into a beautiful, functional centerpiece for your home. It's always our goal to provide expert service and ensure our customers are completely satisfied. If you have any more questions or need assistance in the future, we're here to help!
bbgmamma
1 month ago
Excellent job. My chimney had creosote build up which affected my ability to burn cleanly. Derek cleaned and inspected everything and was able to clear the stack so I can use my wood stove again without sooting. Very grateful! Highly recommend.
Iris Giger
1 month ago
The technician was right on time and did a clean and thorough inspection and job with our gas fireplace. I only can recommend these guys.
Response from the owner:Thank you so much, Iris, for your wonderful review! We're thrilled to hear that our technician provided you with timely and thorough service. Your recommendation means a lot to us, and we're grateful for your support. If you ever need assistance in the future, we're here to help!
Chris Taylor
1 month ago
Excellent job by Marcus. Very friendly, great service. Highly recommend!
Lillian Chapin
1 month ago
Byron and his team were extremely helpful when I discovered some serious fireplace problems when I moved into my home. He took the time to educate, listen, and fix my fireplace quickly!
Response from the owner:Thank you for the kind words about or chimney and fireplace repair services in Evergreen Colorado!
-Byron and the Midtown Chimney Team
We have lived in a 250 year old dutch farmhouse for the last 26 years. One of the fireplaces was so poorly reconstructed, most likely from the 50-60's that we could never use the fireplace. I called Kurt at Midtown and he suggested a wood-burning insert stove . He suggested a contractor to help with closing-in the fireplace hearth so that it seamlessly would receive the wood stove. They had to be pretty creative in how to make this work, and were really patient and focused on getting the best look possible for the age of the house.
In the first month after having the wood burning insert installed, we have used it at least 20 times. Its super easy to fire, draws great, and warms the room fantastically. My wife is thrilled... which is saying something! Nice work Midtown Chimney. We couldn't be happier.
Response from the owner:Thank you so much, Christopher, for sharing your wonderful experience with us! We're thrilled to hear that the wood-burning insert stove has brought new life to your historic farmhouse and that your wife is delighted with the results. It's fantastic to know that Kurt and the team could provide a solution that fits seamlessly with your home's character. We truly appreciate your kind words and are here whenever you need us!
MICHELLE SAK
1 month ago
Mike did a great job repairing shoddy work done by another vendor before him. After finding switches on 3 of my propane fireplaces had their safety wires removed he went about repairing and bringing all of them up to code and working order. Everything works great now. Thank you!
Response from the owner:Thank you so much, Michelle, for your wonderful feedback! We're thrilled to hear that Mike was able to repair and bring your fireplaces up to code. It's great to know everything is working perfectly now. We appreciate your trust in us and look forward to serving you again in the future!
Sarah Cassella
2 months ago
Cannot more highly recommend Daniel - honest and trustworthy vendors are very hard to find and we will absolutely call upon him again should we have any issues.
Response from the owner:Thank you so much, Sarah, for your wonderful review! We're thrilled to hear that Daniel provided you with such a positive experience. Honest and trustworthy service is what we strive for, and it's great to know we met your expectations. We look forward to assisting you again in the future!
Coryn Nelson
2 months ago
I can not begin to tell you how happy we have been with Stephen! I'm a denver designer and he has helped me on a few projects now. His attention to detail and wanting whats best for the customer is top notch! I recently had a client who had 3 fireplace professional out and all of them said they needed to replace the whole unit. Stephan cam ein and fixed it in a matter of 2 days and saved them so much money! 10 out of 10
Josh Greenberg
2 months ago
We have had Levi twice now. The first year Levi came and did an amazing job not only for me, but my father as well. Levi is timely, professional, but my favorite personable. The other thing about MTCS is their website works and the phone staff is great as well. Levi just cleaned our Kuma wood stove for this year and once again showed up prompt with a friendly personality. He got right to work and did another fantastic job. Lastly, MTCS and Levi not only does a fantastic job, but their pricing will beat the pants off of anyone in our area. Thank you Levi and MTCS for being phenomenal at what you do.
Response from the owner:Thank you so much, Josh, for your wonderful review! We're thrilled to hear that Levi has consistently provided you and your father with excellent service. It's great to know that our website and phone staff have also met your expectations. We truly appreciate your kind words and look forward to serving you again in the future!
Stephen Carter
2 months ago
Byron is the best! Beau serviced my freestanding gas stove for the 1st time in 12 years. He did diagnose a bit of a faulty pilot assembly. After replacing the pilot assembly there were some issues with the flame pulling off the thermocouple resulting with the stove refusing to stay burning for longer than 1 minute. After trying several fixes while consulting with Byron and even the Quadrafire techs the problem still remained. Byron came out personally a couple of days later and fixed the problem in less than 10 minutes. His experience really came through for us.
Beau and Byron will certainly to service our gas stove as well as our wood burner that Byron actually installed about 15 years ago.
Don't hesitate to call Mid Town for your fireplace and stove services.
Response from the owner:Thank you for your five-star review of our gas fireplace and gas stove repair and diagnosis business in the Evergreen and Conifer and Bailey area!
- Byron and the Midtown Chimney team
William Binns
2 months ago
Phenomenal work done while also being quick and clean. Definitely recommend these guys for you for any fireplace or chimney needs
Rachel Appel
3 months ago
Byron and crew are fantastic. We’ve always had good experiences with Midtown Chimney and plan to use their services ongoing. Grateful for their friendliness and professionalism!
Response from the owner:Woohoo thank you!
Rachel it has been a pleasure serving you and your husband all these years, fixing the wood stove and sweeping the chimney. We appreciate you!
-Byron and the Midtown Chimney and Firepalce Store Team of Boulder
Laura Kidd
3 months ago
Evergreen - Byron was very communicative when dealing with pellet stove issues right before Christmas. Extremely helpful
Response from the owner:Thank you for your kind words about our pellet stove repair services in Evergreen, CO!
-Byron and the Midtown Firepalce Store Team
Millie Hobgood
3 months ago
Stephen was super friendly, fast, and knowledgeable. Would recommend!
Lindsay S
3 months ago
We moved into a home with a faulty fireplace and couldn’t be happier that we called Midtown Chimney of Franktown. Mike showed up promptly and was incredibly professional, knowledgeable, and easy to work with. He clearly explained all of our replacement options and helped us choose the best solution without any pressure.

When additional electrical work was needed, Mike went above and beyond by arranging for an electrician to come out the very same day. The coordination was seamless, and the end result is a beautiful fireplace that we absolutely love.

What truly sets Mike and his team apart is their integrity and kindness. He even followed up afterward to make sure everything was working perfectly. Honest people, quality workmanship, and fair pricing are hard to find—but Midtown Chimney delivers on all three. We would recommend them every single time!
Response from the owner:Thank you so much, Lindsay, for your wonderful review! We're thrilled to hear that Mike and our team were able to provide you with a seamless and satisfying experience. It's great to know that you love your new fireplace and that our commitment to integrity and quality workmanship made a positive impression. We truly appreciate your recommendation and look forward to serving you again in the future!
Andrew Poole
3 months ago
Beau came out to my property in Littleton, CO and did an awesome job! He was communicative, efficient, and knowledgeable. I would have him back out again!

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