Jonathan and his team did a great job with our insulation. We opted for the complete clean up of old installation and added new blown in insulation this past November, just before the cold s season kicked in. We had just had a new hvac system installed and wanted to ensure we were able to maintain a constant temperature. Our home was built in the 1920's and though previous owners had done some work, the insulation definitely needed to be changed. The months later, we have noticed are heater downs t come on as frequently as last year and our utility bills have actually decreased. Looking forward to summer and see how offer we need to use the AC. Overall we're very happy with the work they did and would definitely recommend them. read more

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If you are looking for the best quality yet most reasonably priced attic cleaning and insulation installation company, check out a couple of five star yelp reviewed companies - then call Jonathan of Marathon Insulation. It is guaranteed that you will stop after talking to him since you can feel the sincerity in his words on what he will deliver to you. He is the owner and will personally supervise the jobs himself. Jonathan together with his partner Ralph and lead Pablo are punctual, their quality of work beyond reproach, things which you will never see will be consciously attended by them and will leave the project spotless. As important, the rodent proofing (with 5 yr warranty), air sealing and that they will treat your attic with BoraCare making sure that you will have termite and other troublesome insects' prevention and control. These are all completed for you to have that much needed peace of mind. The insulation installation is professionally done making sure that what is needed to be accomplished is carried out right. Normally, project like this one is a bit onerous but to say it will be simple with Marathon is an understatement, because they do it admirably well for you. read more

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True professionals in every way! Johnathan was the first to respond to my inquiry and came out the next morning on time. He's honest and true to his work. I received multiple quotes and Johnathan was by far the only one I felt comfortable with. Other companies sent sales reps and couldn't answer many of my questions. Johnathan, on the other hand worked on site with his team and got the job done quickly and thoroughly. Johnathan promptly answered any questions I had before I committed to his service. I can't recommend he and his team enough. Thank you! read more

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I was so happy with my experience. I reached out to get an estimate on insulating my exterior walls and attic. Johnathan quickly responded and came out the following day to look at the job. He was able to explain my options and give me an estimate on the spot. I received 3 other estimates and no one was able to beat what is company had to offer. He was able to schedule me within a couple weeks. The best part was that he was able to complete the job while I was at work which made my life easier. Johnathan and his team did an excellent job cleaning up after themselves and keeping everything professional. They made completely this project easy. The quality of their work looks great. My house is no longer freezing at night so we use the heater less. I appreciate how transparent this company is. Thanks I will definitely recommend this company to anyone in the future. read more

AMAZING is the one word I have to describe working with Marathon installation. I always have low expectations but high hopes when I hire a company to do work at my house. Hope for the best is my motto, that is why having a truly professional team of people provide quality services at a fair price is such a blessing! I found Marathon Insulation on YELP and called them. Jonathan responded promptly and came out to estimate the job of insulating my mid-century house with no wall insulation. Their bid was very fair, so I scheduled the work within the week. Jonathan sent a text reminder the night before the job, perfect timing. They showed up on time and the MI team could not have been nicer and more respectful of my personal things and my property. They work quickly laying down protective film, and drilling the small holes for the blown insulation. Then they seal the hole with a styrofoam cap and a thin coat of plaster on top of that. They even suggested a wonderful plaster / painter to come to do the final patch and paint. I was fearful working with someone new, but they far exceeded my expectations and I would highly recommend them to any of my friends and YELP contacts!! read more

Marathon Insulation - Skim patch of living room wall after blown in insulation by Marathon Insulation. - Insulation Installation Near Me - Sylmar , California

Jonathan's team did a great job with our blown-in insulation. We had our outside walls done and inside our home office. They made extra efforts in problem areas, like where cabling and other interferences were present. Excellent communication and flexibility with schedule. The drilling, install, and touchup was completed in one day. We are very happy with the work and the touch up afterwards. read more

Very happy with the installation of my insulation , Jonathan is a great worker, very professional, he and his team did all the work only in one day , I would recommend to everyone, very grateful read more

Jonathan responded back to me very quickly and he gave me the lowest quote for blow-in cellulose to an attic. He also told me not to forget about tax credit no matter what company I chose. His quote was the cheapest but the works he and his colleagues did great. They were professional and very nice. I definitely recommend Marathon Insulation. read more

They were very responsive. Followed up quickly. Answered all my questions and concerns. Gave me a very competitive price. Scheduled the work for the next day, showed up on time and completed the work professionally. I highly recommend them. read more

I was in a time crunch and they worked really hard to accommodate me. The price was great. And the service was done well. I needed a patio cover to be insulated and also some interior sound proofing insulation during new construction. read more

All of the positive reviews are well deserved! We initially brought Jonathan and his team in to do drill-and-fill insulation for our exterior walls. It was such a good experience that we ended up using him to insulate our attic and add insulation and soundproofing to our garage so that it could be turned into a music room for our drums-loving son. Jonathan's prices were extremely fair, communication was great, and he completed the work super-fast. He's also one of the nicest human beings you'll ever meet. Highly, highly recommended! read more

Jonathan was great and a pleasure to work with. His communication and explanation of insulation products was very helpful and easy to understand and to make a final decision. His team was prompt, professional and friendly. They showed urgency and were well coordinated with set-up, install and break-down. Compared to other quotes I had received, he provided a reasonable price and great value for the work. Glad I went ahead with them to complete this job that was way overdue. Looking forward to saving energy and being comfortable this summer. read more

I had two very informative conversations with Jonathan. His reviews and prices were great. I decided to go with him, even though he didn't seem to want to see my house first (he was busy with business post-fires in Eaton and Pacific Palisades). He asked me to text him the date we settled on and my address. No response---no confirmation, no answering my questions, nothing. I double checked the phone number. He didn't show up date we scheduled and he has still not responded to texts. I guess he just didn't want my business after all. read more

I hired them to remove old attic insulation, clean and seal up any holes to prevent pest from entering. The owner Jonathan was very easy to work with, was on time and the final price was the same as the quoted price. They were fast and cleaned everything up when they completed the job. read more

I fully recommend marathon. Jonathan serviced my brother home and also my home. You can't go wrong with marathon read more

Did insulation twice with these guys and both times were impressive! We had our attic cleaned, rodent proof and insulation done a couple of months back and they did a great job and were quick. This time around we had 1 room insulated. They drilled the holes, filled with insulation and patched the holes up after. We had some decals and stuff hanging on the walls and they were considerate to drill the holes around it. The price was also reasonable and within my budget! If I were to need more insulation jobs in the future done, I would definitely call them again! read more

Highly recommended Ralph and Jonathan are very knowledgeable and explain everything thoroughly. They drilled and filled my entire house with blown in cellulose and I immediately noticed a temperature difference the following morning. read more

Marathon Insulation - Insulation Installation Near Me - Sylmar , California

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Jonathan did an incredible job from start to finish. I recently bought my first home, a 120 year old Craftsman in the valley with an attic like a furnace and a rodent problem to boot. He showed up and 2 weeks later delivered full rodent proofing and full insulation. After vacuuming out all the old insulation and rodent droppings and sanitizing the space, they got to work with the insulation and rodent proofing. There were a lot of inaccessible attic / roof spaces, his team took care to cut access hatches or small cellulose spray holes (all of which he explained in advance when he came out for his initial consult). A common problem with spray insulation is covering up the crawl/walkways and making it hard for any future workers. I asked Jonathan if he could clear a path to save future workers trouble and he immediately fixed it without a second thought. On the rodent front, he installed grates and spray foam over all the obvious access points. This included cutting a small access hatch into the space above the en-suite master bath where the bathroom vent lived and putting grate/mesh over it, as well as spray foaming a PVC entry into the attic which had a big gap surrounding it. I was a little skeptical going in, insulation / attic work is easy to cut corners since it's a dirty job that clients usually don't bother to inspect, but I can tell he goes above and beyond for his customers. 10/10 would hire again. Fantastic work Jonathan & team! read more

Amazing job done be them, responds back and great communication, And as far as Value no other company can beat them.

I contacted Marathon Insulation based on the many great reviews. My home attic was in desperate need of new insulation, and I wanted to insulate my garage roof as well. Jonathan replied quickly with pricing information and answered other questions I had over Yelp, and when I ready to move forward he came out the next day to inspect and provide a quote. A couple of days later his crew arrived and cleaned out the old worthless insulation and installed the new insulation, including a fan to remove heat buildup in the attic. It was very hot that day and must have been miserable to work up there, but the guys toughed it out and finished in 5-6 hours. They next day they came back and did my garage in the morning which took less time. They took care to put down cloth tarps to walk on in the house, and cover up things with plastic to minimize any dirt or debris. They had one little mishap when a workers foot when through the ceiling. An unfortunate accident, but Jonathan wasted no time to get a painter out to repair and paint the drywall the next day and it looked good as new, like it never happened. I understand that accidents like this can happen, and since Jonathan made sure it was repaired quickly and professionally with no additional cost to me I'm still leaving a 5-star review. read more

What a great company! If you are looking for new insulation this company is the best. They explain the process thoroughly, they are very helpful, friendly, and respectful. The clean up and install all went well and we are happy with the results. read more

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Marathon was fantastic. Jonathan was prompt to come out and estimate the work and was straight forward and honest. Did not try to upsell me or anything and delivered the service I needed. Was early to do the work and the work was done quickly and they were sure to clean up after. Highly recommended. Competitive pricing. And, most importantly, the house is warmer now! :-) read more

We were in need of insulation on a portion of the wall the builder failed to install insulation. Marathon Insulation was quick to respond and give us a fair quote. The day of the insulation Jonathan was great and was professional and courteous. The insulation went great and the patchwork for the holes was also great and now that we painted it looks like nothing happened. The room feels a lot cooler and comfortable. Highly recommend. read more

Jonathan and his team were great! My electric bill was soaring (over $300 a month). I chose Marathon over one of the bigger "sales" like companies. Jonathan didn't try to upsell me in anyway, I appreciated that. He originally suggested I didn't need a full clean out and I could save money that way. I did more research and opted for a full clean out of attic and batts insulation. His team completed the job is about 6 hours which was great. They were clean and cleaned up after themselves. It's hard work that they're doing and I appreciate their professionalism. Good job Jonathan! read more

Very professional, on time, neat and tidy, personable and friendly, great price and a job well done... I highly recommend!

Johnathon and his team were on time and did an exceptional job. I would highly recommend their services.

Today we used Marathon insulation to replace the old rubbish of insulation that was in our attic and the service we got was amazing from when Jonathan provided an estimate to when they finished installation. We liked the fact we were able to provide the square footage of our home and obtain an estimate over yelp. It was none of that "We need to come out and do and estimate" like the other companies and the price was still the same regardless. They removed the old blown in insulation with care, leaving our home clean. Not a speck of dust or debris was left behind. They also had an industrial filtered fan going just in case if any debris left the attic. The staff was very friendly, professional, informed us of every step, and one even took interest in our frenchies and mentioned he got one for his family. This made us feel comfortable about their work. Also, I asked Jonathan if he would be able to remove some old wiring from our old security camera system and he was able to do the task which prevented us having to climb in there. The outcome of their work is amazing and of quality. We decided to go with padded insulation because the blown it material is messy. The company does both. We highly recommend Marathon insulation and couldn't be satisfied with the results they delivered. Check out the photos to see the results. read more

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I had a great experience working with this company. They were super responsive and offered competitive pricing. I had three people come in remove all the old insulation seal all the gaps and install R 38 batts. they did a fantastic job. The home feels better already. I will be recommending them to my closest friends and family. read more

After talking with several attic clean out and insulation, wall insulation companies, I decided to go with Marathon Insulation. Johnathan was very helpful and professional, gave the best choices for my issues, without trying to upsell like some of the others. After getting the attic and walls insulated (with attic clean out) I can already feel the heat stay in the rooms much longer and the walls much less cold to the touch before. I highly recommend Marathon Insulation! They were always on time, delivered as promised, and cleaned up after. read more

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To me, being straightforward is the way to go. jonathan asked me what I needed done, and without even coming out to do the, the b.s upsale gave me a quote based on my square foot of the home got straight to the point if you want a great fast job give them your business in n out and the home feels like new wife gave 2 thumbs up read more

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They did an amazing job with a tough attic and even though it was probably more work than they bargained for the price remained the same and they cleaned up so nicely after. Can't recommend enough read more

Jonathon from Marathon was very responsive. He accommodated our needs in spite of it being a small project. He worked with us both in terms of scheduling the work, and where they did the actual installation within the house. We sought the insulation for an interior wall between two rooms. It made a difference, but as Jonathon told us in advance, it's not 100%. Still the reduction in sound volume between the rooms was worth it for us. read more

Excellent communication from start to finish. All questions I had were answered promptly and they were very accommodating to my requests as well. Replaced my insulation and I am extremely happy with the work read more

Johnathan and his team were amazing. Professional and clearly explained the process before starting. They really were very easy to work with and respected and treated the tenants' stuff with care. Johnathan was very easy to reach with post Q&A. He will either answer the phone or call you back within minutes. Price was fair for the service they provided. Thanks guys! read more

Our LADWP bill got ridiculous this summer with our electricity costs going thru the roof. Looked at a lot of solutions and I know Solar tends to be the default but didn't find getting and oversized system just to keep AC running was the best solution. Went down the path and looked at a lot of different Insulation companies and there was one that really stood above the rest and it wasn't even close. So glad I went with Marathon Insulation. Yelp reviews are not long enough to express how great Jonathan was to work with in our insulation journey. He has a great team, is an expert in what he is doing and I'm actually impressed with how much of a substantial difference the insulation has made not only with keeping our house more comfortable and the heating/cooling but also with the sound proofing it adds. Extremely grateful customer with Marathon Insulation. Thanks Jonathan, Ralph and team! read more

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Wow is all I have to say! Working with Marathon was probably the easiest transaction I've ever had. I sent out a Yelp request around 5pm last night and they were out here this morning getting our insulation done for us. We are in the middle of some home renovation projects and I have our stucco guys on stand by so having them come and get this done for us ASAP was awesome! They were very nice guys, cleaned up after all their work and got this done for us a just a few hours. I will definitely recommend them to all my friends and family and we are likely gonna have them come back out to insulate our attic after we finish up with the stucco work. 10 outta 10 for Marathon and 2 thumbs up! Thanks guys for everything. read more

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Don't you just love the feeling when you follow your gut, try somebody new and things turn even better than you expected? That was exactly the case with Jonathan. Not only he replied really fast, was super punctual and courteous but also had the best price of all the quotes I received for replacing the insulation in the attic of my house. Things couldn't have gone any smoother, so I'm not surprised he's in such a high demand. Totally recommend him and his crew! read more

I hired Marathon for insulation removal. They were on time and on point. They did an excellent job, reasonably priced and I highly recommend them. read more

We've had Jonathan and crew complete two jobs for us- the first we had him fill two walls with blown in insulation- the walls were so poorly insulated beforehand that they felt warm to the touch when the sun was on them. The insulation made a huge difference in keeping that room cool. Scheduling and communication was super easy and Jonathan is very friendly. Was able to give me a quote after a quick conversation. We also had our roof done and the attic was a total disaster afterward. Jonathan came out, cleared out the debris and the old insulation, sanitized and treated the space and then blew in new insulation. The thing that really impressed me was how careful they were with dust- they taped a path from the attic to the front door and totally contained the dust. I am SUPER appreciative of that. Highly recommend this company, we will be calling them for any additional insulation needs. read more

Jonathan and his team did an amazing job insulating our attic with R38 Blown In Cellulose! He was very responsive, kind and transparent in insulation differences/needs during the entire process and we are highly satisfied with the results. Our home is significantly better at retaining heat during the cold mornings and throughout the day. We highly recommend them for your insulation needs. Thank you!! read more