Carport that an amateur (me) applied .45 EPDM over/adhered to OSB approx 8 years ago. … .I know now bad move
Didnt take long to start leaking. Had to make 3 seams (at the time) for installation. Transition to shingled gable is also a probable trouble spot.
Have reseamed a couple times. Still cant get it stop leaking.
Have purchased .60 EPDM sheet —Now able to purchase 1 single piece 20 x 40 to eliminate the seam issue. Transitioning to the shingled gable still tricky but will be hiring experienced roofer on his off time to assist.
Have a couple soft spots, especially at gable shingle transition and a couple small other spots where ponding occured. Figure I can hack those
out and replace with new plywood prior to re roof.
Am I on the right track here? Internet research shows I can use a RECOVERY board type of polyisoboard to cover old and re-lay new .60
over top assuming substrated is still solid and or I repaired soft spots.
Owens Corning makes a durapink Iso board specifically made for Recovery roofing. Do I really need recovery board? Is it that much different then regular isoboard? Willing to spend/go the extra mile here not to have to
go through another tear-off…
There is very little if any pitch to this roof. Assuming the substrate is solid, would I be able to start at the gable shingle transition and “step down” some plywood i.e 3/4 to 1/2 to 1/4 inch plywood to create a pitch? As above the recovery board would be applied on top of the plywood then the new EPDM.
Appreciate all ideas and replies…