While there are DIY kits aplenty available to homeowners, unless you've been trained to dig and crawl through your attic insulation and crawlspace planes in order to find specific problem areas, you won't have much luck with air sealing on your own (this, of course, assumes that you're willing to dig and crawl through your attic insulation and crawlspace planes).  With years of experience and the highest trained staff in the area, E3 INNOVATE is uniquely equipped to give you the best results with air sealing.