I am embarking on the renovation of a mountain cabin in snow country. The house is a 30-year-old geodesic dome that has had to bear varying loads of snow over many winters. As a result, the ceiling in the dome, which should be one of its most beautiful features, has developed cracks in the paint & underlying drywall. The cracks have formed along a number of the ceiling seams where triangular faces meet, and some are as wide as 1/2 inch. Though previous attempts have been made to disguise the cracks, they have been only partially successful, perhaps because even after all these years, the ceiling continues to flex with the seasons. I am looking for a more long-term solution. It seems as if it should be possible to patch the cracks, but I don't think just any old spackle will do. I have heard of a caulk product called "Big Stretch," and am wondering if it might be useful in addressing this vexing problem. In addition to filling the cracks, the ceiling will require retexturing over some of the repaired areas. Can small areas, like repaired drywall seams, be retextured to successfully blend in with the existing surface? Who is the ideal professional to tackle the job, or is this something in the realm of possibility for do-it-yourselfers?
Thanks in advance for any advice!