02-13-2015, 04:40 AM
In my experience of home built skylights in damp, rainy environs is the waterproofing and flashing of opening. A full flashed curb ( metal flashing min 6 inches under roofing felt, all the way up curb) is crucial, with roofing paper and flashing lapped and glued with roofing adhesive. The wider the flashing lap on roofing side the better. Lay bottom first on top of roofing paper, then up sides like roofing,keeping in mind laps and seams are top over bottom, or downslope.finish with top curb lap over on sides, under paper on bottom.
The edging of your panel should have a flashing covering the edge of plastic/glass to curb interface, as no matter what you use to bond the panel to the curb, water will find a way in. Recommend roofing metal edging, 1x1 1/2 with drip edge. Put drip edge side along roof flashing. Put bead of butyl or silicone along curb flashing, thin bead along masked off vision panel, glue and screw thru with pan head screws,
Pre drill plastic and location mark flashing to avoid cracking of plastic panel. Easy way to mark is cut flashing, layout screw pattern, start screw with scrap wood backer to make small hole. Full drill thru OK . Continue with screw to finish flashing. Dry lay flashing on top of panel and using it as a drill guide, drill thru flashing and plastic using drill bit diameter of outside edge of screw thread. When done, glue and set flashing with screws.
This ( if my hands have told my brain what to write correctly) will hopefully create a rainproof porthole to observe the galaxies from the comfort of a warm bed, without sleeping with buckets to catch the drip of a leak. Good luck!
Community begins with Aloha
The edging of your panel should have a flashing covering the edge of plastic/glass to curb interface, as no matter what you use to bond the panel to the curb, water will find a way in. Recommend roofing metal edging, 1x1 1/2 with drip edge. Put drip edge side along roof flashing. Put bead of butyl or silicone along curb flashing, thin bead along masked off vision panel, glue and screw thru with pan head screws,
Pre drill plastic and location mark flashing to avoid cracking of plastic panel. Easy way to mark is cut flashing, layout screw pattern, start screw with scrap wood backer to make small hole. Full drill thru OK . Continue with screw to finish flashing. Dry lay flashing on top of panel and using it as a drill guide, drill thru flashing and plastic using drill bit diameter of outside edge of screw thread. When done, glue and set flashing with screws.
This ( if my hands have told my brain what to write correctly) will hopefully create a rainproof porthole to observe the galaxies from the comfort of a warm bed, without sleeping with buckets to catch the drip of a leak. Good luck!
Community begins with Aloha