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  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon85
    Verified insulation services reviews

Find Insulation pros in Eldersburg

Avatar for Koala Insulation of The Greater Baltimore Area
Koala Insulation of The Greater Baltimore Area
4.8(
13
)

Serving Eldersburg, MD and surrounding areas

Approved

In business since 2023

Free estimates

Warranties offered

"We had insulation installed a week earlier by Koala. During the insulation, Jasper (insulator) suggested another area that we might consider installing blown-in insulation. We agreed and the second job was performed on Friday, the 24th. Jasper and Richard were on time, the insulation project was well done and they left the area very clean. Would use them again."
Insulation Projects
Spray Foam Insulation
Insulation Projects
Blow-in Rig
Truck

+9

Response time8 hrs
Recommended by83%of homeowners
Avatar for JT Insulation, LLC
JT Insulation, LLC
5.0(
6
)

Serving Eldersburg, MD and surrounding areas

Approved

In business since 2023

Free estimates

Warranties offered

"Very prompt. Gave us a great price and did a wonderful job installing insulation in a tight area. Would definitely hire him again."
Response time1 day
2 neighbors recently requested a quote
Recommended by16%of homeowners
Avatar for Atlas Home Energy Solutions LLC
Atlas Home Energy Solutions LLC
4.9(
105
)

Serving Eldersburg, MD and surrounding areas

Approved

In business since 2009

Free estimates

Warranties offered

"Highly recommend. Exceptional and professional service from their contractors and most especially by Nolan Walker (Performance Consultant). Nolan showed photos taken of my home's ductwork and insulation and provided a list of options and the cost of each project so that I could make a well informed choice of which projects to pursue. He took his time and was honest and understanding - not aggressive like other companies I have dealt with. His test-out and follow-up appointment was just as thorough. It was a pleasure working with him."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+16

Response time3 days
10 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for RetroFoam of Philadelphia
RetroFoam of Philadelphia
5.0(
22
)

Serving Eldersburg, MD and surrounding areas

Approved (Corporate)

In business since 2023

Free estimates

Warranties offered

"These guys were professional, on time and communicated very well... I would recommend this company to you for all your Spray Foam Insulation needs..."
RetroFoam Wall Insulation
Installing RetroFoam
RetroFoam with Siding
RetroFoam with Brick
Response time1 day
136 neighbors recently requested a quote
Recommended by75%of homeowners
Avatar for Atlas Home Energy Solutions
Atlas Home Energy Solutions
4.1(
34
)

Serving Eldersburg, MD and surrounding areas

Approved

In business since 2009

Free estimates

Credit card accepted

"I hired Atlas Home Energy Solutions to remove old insulation and replace it with the foam technique. However, I ran into numerous unexpected problems due to a slow leak from old pipes. It took awhile to sort out. Atlas Home Energy Solutions gave me lots of expert advice. They were willing to come out and review the situation. They were also willing to reschedule and wait until another contractor dealt with the water issue and its ensuing problems. They helped me make some difficult decisions before they could insulate the crawl space. When it was ready for them to come and insulate the area they bumped their schedule forward to get it done. This company did sterling work. Their expertise and professionalism were outstanding. They really know what they are doing and guided me through a more protracted process than originally envisioned. I would highly recommend them to anyone."
Visual Inspection of all Areas of your Home
Attic Insulation and Air Sealing
Infrared Camera Inspection
Attic Spray Foam
Blower Door Whole House Air Leakage Test

+11

Response time1 day
Recommended by87%of homeowners
Avatar for ROI Construction LLC
ROI Construction LLC
4.3(
17
)

Serving Eldersburg, MD and surrounding areas

Approved

In business since 1974

Free estimates

Warranties offered

"We had a great experience with ROI Construction sales representative David Burke. David was very knowledgeable about ROI's porducts and services. We look forward to getting our attic insulation project completed and will provide a more thorough review at that time. Thanks, Tim"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+19

43 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Smart Energy Pros
Smart Energy Pros
4.3(
19
)

Serving Eldersburg, MD and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"Brian was extremely excellent from start to finish! He thoroughly explained all rebates and incentives which made the project extremely affordable. My attic insulation project was seamless! Excellent communication, friendliness, and amazing job cleaning up. I highly, highly, HIGHLY recommend Smart Energy Pros!"
Energy Audit-Insulation
Energy Audit-Insulation
Energy Audit-Insulation
Energy Audit-Insulation
Energy Audit-Insulation

+8

Response time8 hrs
Response rate94%
5 neighbors recently requested a quote
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Insulation questions, answered by experts

The lifespan of insulation depends on the material type. Fiberglass can last between 80 and 100 years, but it is important to start checking it around the 15-year mark. Spray foam has a lifespan of up to 100 years, and mineral wool can last up to 100 years. Cellulose, an eco-friendly option, has a lifespan of 20 to 30 years.

There are two reasons why cellulose insulation repels rodents (and insects). First, the insulation has been treated with boric acid, which is a natural pest-repellent. In addition, the loose-fill style of cellulose creates less-than-ideal conditions for mice and other rodents to nest and burrow, helping to keep them at bay.

Ideally, you can add new insulation to your existing insulation. However, some circumstances require you to remove old insulation before adding any new insulation: 

  • If the insulation is over 15 years old

  • If the insulation is wet or moldy

  • If it is vermiculite insulation

  • If you see signs of pest infestation

Removing old insulation is best left to a pro who can safely dispose of potential moldy or asbestos-ridden insulation.

In some cases, yes, insulating an unheated garage can lead to mold and mildew. The issue with insulating a garage is that the interior will warm up and cool down more slowly than the exterior air, which can cause condensation inside the space. Where there is moisture, there is likely to be mold and mildew over time. Installing a vapor barrier can help avoid moisture and mildew problems in an insulated garage.

You do not always need to remove old insulation before adding new. If the existing insulation is in good condition—not wet, physically damaged, moldy, or infested with pests—you can add new insulation directly on top of it for a compounding effect. You can also mix different types, such as adding blown-in insulation around existing fiberglass batts.

However, removal is recommended if the old insulation is compromised by water damage or pests. You should also remove it if you plan to install a different type of insulation, like switching from roll or batt insulation to spray foam. If the existing insulation is very old or damaged, you will likely get more benefit from removing it and starting fresh.

The Eldersburg, MD homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.