I checked the web page for the quilt shop where I got the pattern, which they also wrote, and they are open today. Usually aren't on Sunday. Called and asked how I was to "crinkle" the roof. Was told to when I cut the tiki strips, to heat them with the iron and push towards the main part of the roof. I tried it on a practice piece and I think it will work. If not, it turns out we may be in the area of the quilt shop this week and I can stop in. Thanks for all the suggestions.