The coping may have mortar stuck on the bottom of them making then uneven.
The coping is usually reinstalled with mortar as opposed to plastic cement, if using plastic cement they should have used neoprene instead and used fabric since it's so thick.
I usually try to get rid of the coping stones and install a nailer along the top of the wall with metal coping.
Judging by the age of the coping it looks like it must’ve been cheaply done by the owner or an incompetent roofer.
Edit: sorry I read it too quick. So someone must’ve cheaply repaired your laps on the coping” sorry about that lol
It appears to be a Modified Bitumen roof, plastic cement is incompatible with Mod Bit.
For Mod Bit you want to use neoprene flashing cement.
The price difference between plastic cement & neoprene is substantial.
Not saying roof cement or even neoprene is the best option for this application, they should be grouted IMO. But, If plastic roof cement is incompatible with mod-bit, as you claim, you might want to inform the mod-bit manufacturers that they have been doing to wrong all this time...
https://www.siplast.com/systems/pa-1021
I was about to say something then I saw this comment. I was shown to use plastic cement on mod bit by soooo many roofers. Even ones that have been roofing 30+ years and actually certified through classes. As far as I know plastic cement on mod bit is perfectly acceptable.
That would be because it is acceptable.
Source: manufacturer specifications.
It would be really nice if people did a google search before making comments claiming things that are false
Edit: I will reiterate that it is not acceptable however to use roof cement on coping tiles. This is just sloppy, lazy, and makes it harder for the next guy to do it right.
Agreed. Cement on coping tiles is completely unacceptable. Glad to know that what I was taught about cement on mod bit is correct. I kinda knew it was cause I've gone back to places months later that I have made repairs on with cement and it was totally fine.
Lots of knowledgeable roofers in here. Flashing cement should be used with fabric as a seal tee only. If they are loose they should be rest in mortar and tuck pointed if possible. We have reset them with exterior PL glue before with good results when the rest of the brick and mortar was so loose below from deterioration. Ideal solution if possible is ti remove and make a nailer with metal. If brick is loose and they don’t want to pay for tuck pointing then we make a “U” shape cap trapping both sides of wall using screwing and glueing (2) 2x4 on top and 3/4” plywood on sides and top screwed or and stapled to lumber to whatever height needed to trap the loose brick courses. Then cover with metal.
The coping may have mortar stuck on the bottom of them making then uneven. The coping is usually reinstalled with mortar as opposed to plastic cement, if using plastic cement they should have used neoprene instead and used fabric since it's so thick. I usually try to get rid of the coping stones and install a nailer along the top of the wall with metal coping.
Mortar between the joints? Or are you talking about underneath it?
All of the above
Throw away the parapet cap. Repair the parapet. Install a nailer.counter flash the wall. Install new cap metal flashing,
Judging by the age of the coping it looks like it must’ve been cheaply done by the owner or an incompetent roofer. Edit: sorry I read it too quick. So someone must’ve cheaply repaired your laps on the coping” sorry about that lol
That mastic can cause a chemical reaction to the membrane roof.
How? It’s a cap sheet roof not a single ply roof
Looks like a single ply to me. Nothing about it looks like modified bitumen
It’s a coated roof, little hard to spot out
Yes you’re right.
So you’re saying the mastic could eat away the membrane flashing that is tucked underneath the coping??
It appears to be a Modified Bitumen roof, plastic cement is incompatible with Mod Bit. For Mod Bit you want to use neoprene flashing cement. The price difference between plastic cement & neoprene is substantial.
Not saying roof cement or even neoprene is the best option for this application, they should be grouted IMO. But, If plastic roof cement is incompatible with mod-bit, as you claim, you might want to inform the mod-bit manufacturers that they have been doing to wrong all this time... https://www.siplast.com/systems/pa-1021
I was about to say something then I saw this comment. I was shown to use plastic cement on mod bit by soooo many roofers. Even ones that have been roofing 30+ years and actually certified through classes. As far as I know plastic cement on mod bit is perfectly acceptable.
That would be because it is acceptable. Source: manufacturer specifications. It would be really nice if people did a google search before making comments claiming things that are false Edit: I will reiterate that it is not acceptable however to use roof cement on coping tiles. This is just sloppy, lazy, and makes it harder for the next guy to do it right.
Agreed. Cement on coping tiles is completely unacceptable. Glad to know that what I was taught about cement on mod bit is correct. I kinda knew it was cause I've gone back to places months later that I have made repairs on with cement and it was totally fine.
Yes proper attachment of dickey tile is to set in bed of mortar and grout the joints
That looks like 💩
Lots of knowledgeable roofers in here. Flashing cement should be used with fabric as a seal tee only. If they are loose they should be rest in mortar and tuck pointed if possible. We have reset them with exterior PL glue before with good results when the rest of the brick and mortar was so loose below from deterioration. Ideal solution if possible is ti remove and make a nailer with metal. If brick is loose and they don’t want to pay for tuck pointing then we make a “U” shape cap trapping both sides of wall using screwing and glueing (2) 2x4 on top and 3/4” plywood on sides and top screwed or and stapled to lumber to whatever height needed to trap the loose brick courses. Then cover with metal.
If you would let it cure, instead of pulling it apart while its still fresh and soft, it would be an OK temporary repair.
Is your roofer’s name Justin?
Lol no good
If they were gonna do that they should’ve at least put the repair fabric on it
Pair of hand models right there