Alpha Design Services
“Additionally, he's applied his wide range of knowledge to many of the project inquiries we have had, successfully guiding us to solutions that are sometimes even better than what we are looking for.”
Best Insulation Contractors near Ellicott City, MD
2 of these contractors are based in Ellicott City; the others serve Ellicott City from towns including Baltimore (12 mi), Elkridge (7 mi) and Pikesville (9 mi).
4 open 24/7 · 9 open weekends · all 15 rated 4.5+ · 4 show a license
Data verified November 2, 2026
Gawthrop Contracting
“The new space included a large, airy bedroom, a spectacular bath with a one-of-a-kind tile mural, dream closets, a yoga room, and a beautiful outdoor deck.”
Roland Slate Service Co.
“We have used Roland slate for the roof repair on our slate roof for the last couple of years.”
Exterior Experts Inc
“We recently had Exterior Experts replace our aging rooftop deck with a new composite deck, and we're very happy with how everything turned out.”
Kelbie Home Improvement Inc
“Mr Kelbie did an excellent job on my roof repair with great customer service and affordable prices.”
Four Seasons Roofing
“More importantly, they came back multiple times to address rain sheeting that overshot the gutters, corners that overran against the house, and areas that needed barriers placed to direct the flow of rain”
The 15 contractors listed for Ellicott City, 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: Ellicott City, MD
The 15 contractors on this page are rated from 4.5 to 5.0 across 3,618 reviews; 13 have 50 or more reviews. When customers rate these contractors on specific qualities, they most often praise responsiveness (92%), professionalism (89%) and quality (86%). The topics that come up most in reviews of the contractors on this page are "estimates", "price" and "cleanliness". 4 are open around the clock; 9 are open on Saturdays and 5 on Sundays. The services the contractors on this page list most often on their websites are commercial roofing (3), flat roofing (3), gutters (3), roof repairs (3) and roofing (3). 4 show a license on their websites and 6 have a BBB rating of A or A+. 11 have ten or more years of experience, the longest 45 years. 4 offer emergency call-outs; 9 offer financing or payment plans; 7 give free estimates; 6 are family- or locally-owned and 2 list coupons or special offers. We have a website on file for all 15 of the contractors on this page; 14 publish a contact page; 10 list a public email and 1 takes bookings online. 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.
Are all of these firms based in Ellicott City?
No. 2 have an address in Ellicott City and the remainder come from other towns within 15 mi. Insulation crews travel with a truck and a blower, so coverage tends to be regional. Confirm your address is inside the area they work before scheduling.
Zenith Inc
“The roof is exactly what I wanted looks great color is nice the workers and crew were very kind and did an excellent job with the project and clean up.”
Badger Contracting
“The repaired 14 pairs of 121 year old shutters (look like new), repaired cedar shakes and replaced rotted roof.”
Charm City Roofing
“Mark at Charm City Roofers helped fix my roof when I had been having issues with leaking within the house.”
Park Heights Roofing
“They came at a convenient time for me which I appreciated and diagnosed the issue quickly.”
A1 Roofing's Kangaroof
“Kangaroof was excellent from the initial inspection to the roof replacement at my home, Maurice and his team did a great job!”
Liberty Windows & Siding Inc.
“Peter's exceptional coordination skills ensured that every step of the process was smooth, and he was always readily available whenever we needed to discuss changes to the original contract.”
Horizons Unlimited
“These guys are quick, professional and did a fantastic job on my fence.”
Welsh Roofing Company
“Had new roof and gutters handled by Welsh, they were the best of the multiple estimates we received.”
Atlas Home Energy Solutions
“Anthony was nice, funny, knowledgeable, quick explained everything well, patient, friendly, great customer service!!!”
Why these companies made our list
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