Why Flat Tile Roofs Leak in Weird Places

[@f1f278]

thank you sir!! now it makes much more sense as to why i have the same issues nearer my gutters.

[@gordonpotts753]

Excellent explanation of concrete roof system.

[@davidcaldwell4953]

The American way of roofing is strange. fixing concrete tiles directly on to the roofing paper is a long term recipe for trouble in UK we fit batten from ridge to gutter .Then battens at fixed gauge parallel so the tiles never touch the paper far better system. The proper way

[@fixdroofing]

Interesting. Sounds like a pretty good system

[@neilkennykenny4113]

I agree with ye, plus it looks like thers not enough head lap on those tiles, if you look at the water mark it's only barely covering the nail holes, and who uses a blob of rendering to flash around a pipe.

[@everythinghomerepair1747]

@@neilkennykenny4113 that’s not the normal way of doing tile in America. In Arizona tile roofs have a proper lead flashing around each vent pipe. They also use wooden battens under the rows of tile like in the UK.

[@tonyford5326]

We have a similar tile in England stonewold or Marley modern I’ve just looked at a similar problem on a roof and in my opinion the tile isn’t the problem it’s the gauge dropping the gauge an inch will solve it especially on a lower pitch roof it might add a couple of course’s and the extra weight needs to be taken into account

[@ccloutiutube]

Very good explanation. Thank you.

[@jamesburton668]

This underlay is prehistoric!! I wonder how old the roof is. In the uk we had an underlay similar to that called 1F but that was donkeys years ago. Now it’s all breather membranes n always hang tiles to battens makes no sense laying them to the underlay. Also, where’s the lead slate for the pipe??? They’ve just blathered it with mortar👀 yikes! Not the way it should be done

[@ojosverdesrvgt]

Great information, thanks!

[@hansgruber2509]

The issue here is the underlayment has failed , look at the vertical crack next to the vent, unrelated to the horizontal cracks "caused by trapped water"

[@neilkennykenny4113]

Thanks for the video, we use a very similar flat tile(12x16") to what you have shown here, it looks like there is not enough head-lap on those tiles we usually allow 4" of headlap and no less than a 22.5 degree pitch on the roof and the under felt would not be depended upon to weather the roof, I agree with you that profile tiles are better that flat because the interlocking channel is positioned higher up and so water flow cannot enter the channel as it can with the lower positioned channel on a flat tile.

[@davidchi1277]

Tiles and slate are to keep the water out, the under felt is really a dust sheet and a temporary tarpaulin.

[@axjohn]

I would have loved to see the repair of this area.

[@fixdroofing]

We ended up replacing the lead plumbing vent flashing and re-sealing the area using modified bull and membrane.

[@ianhoare289]

try using battens

[@BradBlake-mp7us]

Try BattensPlus roof Battens the water flows through does not pond behind it

[@russellschneider9907]

LMAO ! Instalation failure! No battons! Code says there must be min. 1*2" minimum wood battons ubder flat tile, with gaps in battons every 4'

[@flaman1967]

Thank you for calling him out because I have a flat tile roof in Arizona built in 2018 and I was worried. IF battons are used flat and s style roofs must be equally good.