
Serving Rockland, DE and surrounding areas
Approved
In business since 2006
Free estimates
Small jobs welcome
"They were punctual and explained what was to be done. The job done was a room over the garage that that needed insulation."


Serving Rockland, DE and surrounding areas
Approved
In business since 2006
Free estimates
Small jobs welcome
"They were punctual and explained what was to be done. The job done was a room over the garage that that needed insulation."

Serving Rockland, DE and surrounding areas
Approved
In business since 1981
Free estimates
Credit card accepted
"They showed up on time and the work were done in a timely manner. They cleaned up and left no mess. The insulation really helped to warm up the shed."





+4

Serving Rockland, DE and surrounding areas
Approved
In business since 2021
Free estimates
Emergency services offered
"Did a great job on the insulation however they left a hole in the ceiling when they dropped something on the attic floor. Not a big deal but they need to be careful. Overall, amazing work they do all kinds of insulation and they also install radiant barriers on roof joists. They are reasonably priced and the crew is super friendly, pleasure to work with."





+6

Serving Rockland, DE and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"Contacted Master Attic via Angi and Alex, the technician came to evaluate our attic and crawl space (2 separate spaces in our house). We heard critter noises and our upstairs was hot in the summer. The insulation was original to the ~30 year old house, so we know it's about time to get it done. Alex checked both spaces and showed us photos of problem areas. We have an estimate and Alex explained the details of the work involved. The team came within the week (we lucked out to take the spot of a cancellation), and everything was done as expected. There was a lot of work to remove old insulations, vacuum all debris, sanitize the space, seal all air gaps, install baffles, rodent proof, and install new insulation. The work was completed in around 6 hours, the spaces are now clean and tidy - quite unbelievable given how they were before. We went for the heavier insulation which is reflected in the project cost."





+106

Serving Rockland, DE 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..."




Serving Rockland, DE and surrounding areas
Approved
In business since 1976
Free estimates
Credit card accepted
"Provided excellent recommendations and completed the work in a satisfactory manner."

Serving Rockland, DE and surrounding areas
Approved
In business since 2010
Free estimates
Emergency services offered
"Friendly Knowledge Answered all questions"





+137

Serving Rockland, DE and surrounding areas
Approved (Corporate)
In business since 1928
Free estimates
Small jobs welcome
"Came out promptly - same day, on a Saturday, to remove a hornets nest because I have a bee sting allergy. Very courteous"

Serving Rockland, DE and surrounding areas
In business since 1977
Free estimates
Credit card accepted
"Unfortunately, when the techs started the process, the insulation already in the walls prohibited the addition of the foam. I cannot begin to tell you how disappointed I was, as the job they had done on our tiny addition was remarkable. However, isn't it wonderful to have a company tell you the truth!"

Serving Rockland, DE and surrounding areas
In business since 2020
Free estimates
Warranties offered
"Highly recommend Koala insulation to anyone in need of insulation services. Matt was prompt, friendly and examined all options. During the day of sevuce, the installation crew showed up on time , examined the process, worked quickly and cleaned up after. Their prices and quality cannot be beat and its not easy to find high quality at such a price. Thank you!"



Old insulation should be removed when it shows damage, contamination, or heavy deterioration. If you notice water stains, rodent droppings, mold, or large gaps, plan on taking it out to protect your home’s energy performance and indoor air quality. Removing compromised material eliminates health hazards, cuts energy loss, and sets the stage for a safer, more efficient attic—all while keeping utility bills in check.
R-value measures how well insulation resists heat flow—the higher the number, the better it slows heat transfer. The right R-value keeps your home warmer in winter and cooler in summer, saving energy year-round. Match the rating to your climate zone and have a pro verify performance over time, because moisture or settling can lower R-value and cut efficiency.
Attic insulation can stay in place for 80 to 100 years, but its performance often drops after the first 15. As dust, moisture, or mold build up, the material loses R-value and allows heat to escape. Schedule periodic inspections so a pro can tell you when replacement makes sense—helping you keep energy bills down and indoor comfort up.
You can over-insulate an attic. Beyond the recommended R-value, extra layers don’t add efficiency and can trap moisture, leading to mold or reduced performance. A local insulation pro can measure current levels, confirm the right target for your climate, and advise on any adjustments so you avoid future energy or maintenance headaches.
Insulation can be damaged by mold, pests, water leaks, or accidental electrical contact. When the material is compromised, it loses R-value and can introduce health hazards. Removing and replacing affected sections restores efficiency, while routine inspections from a qualified pro help you catch problems early and keep your attic safe and energy-smart.
From average costs to expert advice, get all the answers you need to get your job done.

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