I just installed three roll ups in my shop. Super easy install compared to the last few overhead doors I've done.
Sealing, the roll ups are great along the sides, but have a good sized gap at the top. It has to do with the drum or spool of door changing diameter when it is raised (Large OD) or down (small OD). When it is down, the gap is there.
One way to avoid this is to order a taller door than your opening. 10' opening, get an 11' door. The longer guides will hold it close to the header, reducing the gap. But you need the extra headroom. Tough to describe, but if you see one of these doors in person, look at the top from the outside, it will be obvious. You can get seals for it, but they need to rub against the door while moving, I havent installed mine for fear of scratches. I gotta do something quick though, the birds are starting to look for nests and that gap is an easy way in for them
