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Topper Construction
- Warranty
- Job
- Estimate
“Carlo showed me photographs of the new roof installation as they did it, from clean off, through to insulation and ice barrier installs, and finally the R-Loc high seam roofing system.”
Best Insulation Contractors in Frederick, MD
24 contractors listed · 12 in Frederick · 3 open 24/7 · 13 open weekends · 23 rated 4.5+
Data verified October 18, 2026
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Semper West Roofing
- Project Manager
- Siding
- Work
“From the initial consultation to the completion of the project, they kept me well-informed about the schedule, materials, and any potential issues that arose.”
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Pj's Roofing
- Nails
- Job
- Home
“They really went above and beyond--someone on their crew noticed a piece of gutter that wasn't well supported, and they fashioned a support out of flashing.”
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Apex Solar & Roofing
- Insurance Company
- Job
- Estimate
“We also replaced the windows upstairs shortly after the new roof (we went with brown), so between the two projects we noticed a significant improvement in the temperature upstairs…cooler in the summer and warmer in the winter.”
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M&J Exteriors LLC
- Work
- Gutters
- Estimate
“Through home Insurance, nothing more humbling than having a Roof over your head,very blessed to have such a Wonderful Team and Company Like M&J Exteriors LLC working hard for our family !”
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Frederick Roof Repair
- Pipe
- Leak
- Estimate
“We have used Stephan and Frederick Roof Repair for years to repair missing shingles from wind damage on our aging roof after storms and they always did a great job for us.”
The 24 contractors listed for Frederick, MD insulate attics, walls, crawl spaces and rim joists. Details under each one about materials, hours and the services advertised are copied from the company's own site; star ratings and comments come from public reviews.
Area overview: Frederick, MD
12 of the 24 contractors we list are based in Frederick; the other 12 serve Frederick from towns including Ijamsville (11 mi), Middletown (6 mi) and Jefferson (8 mi). The contractors on this page are rated from 4.3 to 5.0 across 3,669 reviews; 18 have 50 or more reviews and 23 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (87%), quality (87%) and responsiveness (86%). The topics that come up most in reviews of the contractors on this page are "estimates", "price" and "communication". 3 are open around the clock; 13 are open on Saturdays and 5 on Sundays. The services the contractors on this page list most often on their websites are roofing (6), siding (6), windows (5), gutters (4) and doors (2). 16 show a license on their websites and 8 have a BBB rating of A or A+. 14 have ten or more years of experience, the longest 80 years. 3 offer emergency call-outs; 8 offer financing or payment plans; 11 give free estimates; 9 are family- or locally-owned and 1 lists coupons or special offers. We count these figures across the contractors on this page; distances are straight-line, and hours and prices change, so confirm the details with the contractor before you book.
How many listings here have a website?
A website is on file for 23 of the 24 contractors here. Use it to see which materials they actually install, since a firm that only sprays foam will recommend foam. A contractor with no site is not automatically worse, but you will have to ask on the phone what the site would have told you.
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MLM Home Improvement
- Accounts Receivable
- Project Manager
- Windows
“Our sales representative, Philip R, helped us navigate insurance nuances and provided clear communication throughout the entire process (which was a total of six+ months due to insurance delays).”
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Shumaker Roofing Co.
- Personality
- Questions
- Information
“The plan for our new roof had comprehensive protection against water intrusion, used top quality materials, and still managed to price well below what we were expecting (we reviewed local and national averages per square foot).”
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Politz Enterprises Roofing Inc.
- Downspouts
- Job
- Communication
“A neighbor recommended Politz Enterprises to me for a full roof replacement, it turned out to be one of the best repair experiences that I have had on my 22 year old house.”
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TEO Construction
- Informative
- Gutters
- Siding
“Workers arrived on time, worked hard and quickly, and cleaned up everything afterwards, my garage was cleaner when they left then before they came, they used a blower to clean all areas, used a magnet to pick up nails, and even took time to wave to o...”
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ETC Services
- Tarp
- Price
- Communication
“ETC Services was timely in providing an estimate, was comprehensive in describing the work to be done and the materials to be used, was direct and easy to work with, was professional in all dealings and the work done, was timely in performing the wo...”
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First Call Contractors
- Hail
- Siding
- Job
“We appreciated Brian's guidance throughout the whole process but especially impressive was his reliability, fairness, organization and, above all, he is a man of his word.”
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Edram General Construction
- Floor
- Job
- Estimate
“We took a home built in 1792 and made the bathroom and doors ADA compliment, painted, wallpapered, put book shelves in, carpeted, all new floors, new kitchen appliances, backsplash, 2 ceiling fans and 11 light fixtures, all new fixtures in both bathr...”
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Authority Roofing
“He comes when he says he will and his work is top quality and I'm not easily pleased so I would without question recommend his company”
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Jacob Air Duct Cleaning & Attic Insulation
“We had them put in an attic ladder, removed the old insulation and installed new fiberglass.”
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Arch Exteriors LLC
- Schedule
- Questions
- Insurance Company
“The appointment was about two hours for completion of contract and setting up the no-interest one-year payment plan, and a date scheduled for installation.”
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Custom Concepts Construction Inc.
- Scope
- Job
- Schedule
“Once the contract was signed, we really appreciated Katherine who was our liaison and kept us updated on contract progress, scheduling and meeting dates/times.”
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Eastern Exteriors
- Cost
- Insurance
- Questions
“They ensured no nails were left on our property and all backyard furnitures and flower pots were moved back to the original spot after the roof work was done.”
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Absolute Home Solutions
- Questions
- Siding
- Windows
“This was a very hard job as we were dealing with a non-responsive insurance adjustor who insisted the discontinued siding could be repaired with something "similar".”
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Exteriormax
- Plan
- Insurance Company
- Crew
“Our rep Chidi was surpassingly patient working with us to coordinate with the insurance adjuster, solar removal and install team, and the overall roof replacement.”
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PRG
- Educated
- Questions
- Crew
“Paul was very informative, he came by looked at my house and educated me on the roofs life span, what to look for in the future so I know when to call again, etc.”
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High Performance Home LLC
- Team
- Job
- Siding
“HPH blew in R30 insulation above the first floor attic to top off the R19 already there, insulated the basement rim by the joists and also insulated the area above the replacement soffit along that section of the first floor (a 2-car garage in which ...”
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GSA Home
- Communication
- Project
- Team
“They certainly value your time as they demonstrated by being punctual from our very first meeting together to the installation of our roof and vinyl siding.”
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American Spray Foam
- Owner
- Company
- Job
“The quote was 1/3 the price of our highest quote and almost half of the price of one of the other quotes for the same space, same insulation removal, and the same type of closed cell insulation we requested.”
Why these companies made our list
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