Popular Cities
2 of these contractors are based in Timonium; the others serve Timonium from towns including Baltimore (10 mi), Owings Mills (9 mi) and Towson (4 mi).
5 open 24/7 · 15 open weekends · 20 rated 4.5+ · 11 show a license
Data verified October 18, 2026
The 24 contractors listed for Timonium, 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.
The 24 contractors on this page are rated from 4.3 to 5.0 across 4,412 reviews; 20 have 50 or more reviews and 20 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (90%), quality (85%) and responsiveness (81%). The topics that come up most in reviews of the contractors on this page are "estimates", "price" and "communication". 5 are open around the clock; 15 are open on Saturdays and 10 on Sundays. The services the contractors on this page list most often on their websites are gutters (6), siding (6), decks (4), roofing (4) and commercial roofing (2). 11 show a license on their websites; 1 lists staff certifications (GAF) and 7 have a BBB rating of A or A+. Domain records put 15 websites of the contractors on this page at ten or more years old; the oldest dates from 1997. 5 offer emergency call-outs; 12 offer financing or payment plans; 15 give free estimates; 10 are family- or locally-owned and 5 list 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.
No. 2 have an address in Timonium and the remainder come from other towns within 20 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.
