
Serving Washington, DC and surrounding areas
Approved
In business since 2022
Free estimates
Credit card accepted
"Founders Insulation did a very good job on installing insulation in ceilings! They were careful, courteous and cleaned up."





+11


Serving Washington, DC and surrounding areas
Approved
In business since 2022
Free estimates
Credit card accepted
"Founders Insulation did a very good job on installing insulation in ceilings! They were careful, courteous and cleaned up."





+11

Serving Washington, DC and surrounding areas
Approved
In business since 2020
Free estimates
Warranties offered
"Great! Job was complete .... removal of existing 50+ year old insulation, air sealing attic, baffle installation, installed 18 inches new fiberglass blown insulation, and new whole-house fan. Job started and completed as proposed. Crew on-time, quietly performed their work, and left spaces clean when done. Definitely worth the cost as noticeable improvement in second floor temperature and humidity readings."





+1

Serving Washington, DC and surrounding areas
Approved
In business since 2025
Free estimates
Warranties offered
Here at Koala Insulation of Washington DC, we pride ourselves on our professionalism, as well as our ability to complete every job to the homeowner's total satisfaction. We never leave a job unfinished, or a homeowner not 100% satisfied with our level of service. We handle insulation work in Washington DC and the surrounding areas - Call today!\n\n



Serving Washington, DC and surrounding areas
Approved
In business since 1984
Free estimates
Warranties offered
"It was amazing, took all day to get the old insulation out, seal the holes, and refill with new insulation. Would recommend this company to anyone looking for a professional service to improve insulation and save money on heating and cooling costs."





+2

Serving Washington, DC and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"These guys were great. Allen met me at the door with a firm handshake told me what they were about to do and if I had any questions just ask. Leo was just as professional during insulation and got the job done in 3 hours. Dylan kept me up to speed during both projects and was very helpful. Easy reccomendation."





+9

Serving Washington, DC and surrounding areas
Approved
In business since 1974
Free estimates
Warranties offered
Why choose ROI Construction? Our Gold Standard guarantee is 100% customer satisfaction, 100% of the time! - It's that simple. No need to keep looking for “Contractor near me,” we are the top local Maryland and DC family owned Exterior company (est. 1974) that delivers the best results and a positive return on investment in the area!\n\nROI also does a final walkthrough of every-single-job to ensure that we deliver a superior finished product for every ROI customer!





+19

Serving Washington, DC and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"Desire Masonry Construction, LLC ensured everything went smoothly and effortlessly. Their team showed up promptly, worked with great efficiency, and left the site spotless after finishing the job. The entire process was incredibly straightforward and trouble-free. Their professionalism and attention to detail were evident throughout, making the experience as easy and pleasant as possible. I’m very satisfied with the outcome and would highly recommend their services."





+28
Serving Washington, DC and surrounding areas
In business since 1907
Free estimates
Credit card accepted
"There was a problem initially with the radiant barrier installation - the first crew of two were installing 30" wide rolls lengthwise along the roof end to end instead of from ridge to eave as the manufacturer recommends and made a couple of other minor mistakes which were easily corrected. After talking to the manufacturer, the sales rep offered to take out what had been installed and re-install according to spec or continue as already done with sealing of all seams and a discount on the job. Done this way, the foil would not have the insulation properties per spec but would provide the radiant barrier I desired. I chose the letter option and the barrier work was continued by another crew on the 2nd day. On the 3rd day the crew finished up with the barrier then blew in the installation.
With the exception of the initial problem, the work was done neatly and professionally by courteous workmen who cleaned up completely after the job was done.
"

Serving Washington, DC and surrounding areas
In business since 2004
Free estimates
Credit card accepted
"From the start, we got a very prompt and profession response from Accurate (Dave Law). He came by and
proposed several options, emailed detailed proposals quickly. Schedule an install quickly. Crew were punctual
and had all work done in ~3 hours. Great work, cleaned up nicely, very professional.
Well done.
"
Local and federal rebates are available for insulation installation, which can significantly reduce your overall costs. Many utility companies offer incentives or rebates to homeowners who improve their home's energy efficiency. Contact your local energy provider or government agencies to learn about available programs in your area, and consult with a professional insulation installer to maximize your savings.
It's not necessary to remove old insulation before adding new insulation, as long as the existing insulation is in good condition—dry, free of mold, and not damaged. Adding new insulation on top of old insulation can improve your home's energy efficiency by increasing the overall R-value. However, if the old insulation is wet, moldy, or damaged, it's best to remove it before installing new insulation to prevent potential health risks and ensure optimal performance.
Insulating a house takes between five and twelve hours for batts or boards, and two to five hours for spray foam or blown-in insulation. The exact time depends on the size of your home, the type of insulation, and the accessibility of the areas being insulated. Keep in mind that projects may take longer if old insulation needs removal, if there's a larger square footage, or if spaces are difficult to reach.
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