I have several small (~6â€™ x 20â€™) flat tar and gravel sections that come off a 45 degree pitch with concrete tiles. See attached photos. No corners, few penetrations. The portion over the main house is a bit more complicated - ~25â€™ x 50â€™, two vertical walls with an outside corner and vents for the furnace and kitchen.
Iâ€™m a DIYer, but have never done a roof. In my reading EPDM looks appealing, though one supplier was trying to direct me toward TPO (which they sell). I want the approach that is safest and requires the least amount of expertise. Paying a bit more for materials is ok. Is EPDM the way to go or are there other approaches I should consider?
I live in a part of California where it doesnâ€™t snow but it does rain a lot for 4-5 months.
Some specific questions:
1) If EPDM how would you handle the point where the flat portion meets the pitch? Iâ€™ve read that asphalt products degrade EPDM. My plan would be to remove the bottom row of tiles and the lower baton (shown in detail photo at 11â€), peel up the felt(?)/underlayment(?), remove whatever tar or asphalt product is below that, run the EPDM up the pitch as far as I could reach (about 8â€?) and adhere it without a termination bar, place aluminum flashing between the EPDM and felt, replace the felt, batton (with nails â€“ yikes!), and tiles. Is there a better way to make this transition? Can I peel up the felt or is it going to be strongly attached? Iâ€™d be a little uneasy putting the EPDM on top of the felt out of fear that water that made its way under the tiles would also get under the EPDM. Also worried about the felt degrading the EPDM.
2) Iâ€™d probably cut the copper flashing on the pitch at the top of the lowest row of tiles, adhere the EPDM up to the top of the fascia board and finish with a termination bar, then cover the termination bar with copper flashing which Iâ€™d slide under the original flashing that was still attached on the pitch.
3) The gravel stops are heavy-gauge copper. Is there a way to remove the tar and reuse them? This probably isnâ€™t cost-effective for professional roofers, but Iâ€™d like to remove them without destroying them if possible.
4) There are 2 scuppers (see photos), the other drains are through the roof. Any suggestions on these details would be helpful.
Thanks so much for your help!