just wanted to share something we found, we were concerned about our hinge on our nest box leaking since it is an exterior nest box. At Home Depot and Lowes they sell a rubber mat that you buy by the foot. It is used to put under a shower tray- to protect floor and walls from any leaking water. HD had a 4 foot wide and Lowes had it at 5ft wide- so depending how long your nesting boxes are you have two choices. We are hoping this works- we ( my husband) attatched it under our siding and it lays flat over the hinge and onto the shingles. We were looking for something flexible enough to handle the many openings of our nesting box- this is all new to us and wanted to try and share a little something to give back a piece of what we have learned! Hopefully this will work!