Dry ridge system (Manthorpe) installed - will it leak?

[JayN]

During a few sunny days I dismantled the old Marley Modern angular ridge and replaced it with the new same ridge tiles. Please look at the photos of the plastic union/clips attached. It's not one of those ratchet systems where you place the two tiles in place then push the ratchets in, in Manthorpe you have to slide the tiles under the plastic thingy. It's a tight fit and takes some jiggling, using a half round file to get rid of burrs and bits of concrete helps a lot, then it slides in right to the end (in 98% of the cases). I have no idea what the tolerance is, how tightly the tiles should butt up to the plastic. It is almost impossible to make it perfect.

So I think the ratchet system is superior. Also, in the tinternet some say the grooves in the plastic, if water gets ander the tile, will channel the water down. But in this system as you can see, the grooves are not continuous, there's a flat smooth section. Why wouldn't water just slide off the edge there? And in some others there's a small lip on the edge. This one doesn't.

Also, roof tiles are flat and the union was tight against them due to the pitch of my roof so made small weep hole notches because everything seemed very tight against the roof tiles.

So I don't know if I bought the best product, I guess I'll know real soon now that the summer rains have arrived. The membrane is perforated for ventilation and will not help if there's a leak. Yes, I know I'm overthinking this but I also think that plastic union could've been designed better.

 

[noseall]

During a few sunny days I dismantled the old Marley Modern angular ridge and replaced it with the new same ridge tiles. Please look at the photos of the plastic union/clips attached. It's not one of those ratchet systems where you place the two tiles in place then push the ratchets in, in Manthorpe you have to slide the tiles under the plastic thingy. It's a tight fit and takes some jiggling, using a half round file to get rid of burrs and bits of concrete helps a lot, then it slides in right to the end (in 98% of the cases). I have no idea what the tolerance is, how tightly the tiles should butt up to the plastic. It is almost impossible to make it perfect.

So I think the ratchet system is superior. Also, in the tinternet some say the grooves in the plastic, if water gets ander the tile, will channel the water down. But in this system as you can see, the grooves are not continuous, there's a flat smooth section. Why wouldn't water just slide off the edge there? And in some others there's a small lip on the edge. This one doesn't.

Also, roof tiles are flat and the union was tight against them due to the pitch of my roof so made small weep hole notches because everything seemed very tight against the roof tiles.

So I don't know if I bought the best product, I guess I'll know real soon now that the summer rains have arrived. The membrane is perforated for ventilation and will not help if there's a leak. Yes, I know I'm overthinking this but I also think that plastic union could've been designed better.View attachment 415686View attachment 415687

Its fine. Fear not. We have installed gazillions of Manthorpe stuff.

 

[mrrusty]

not gazillions, but a few and no problem. It was recommended as the best system to me by the local roofing supplier

 

[JayN]

Thanks, that puts my mind at ease. That job is fairly difficult for a 60+ year old man who is gingerly stepping on old and brittle Marley Modern tiles from 1970. I was easily able just to lift the old ridge tiles off the mortar bed. I decided against the brackets and screwed the battens on the trusses, then another batten on top so there's a nice dome under the membrane. I still need to OB1 some cracked small corners and replace some eroded roof tiles and hopefully job's a fish. Five years from now I would have to call a man for a job like this.