How to bridge Colorbond to tiles on the roof?

[a_amir]

Greetings, lovely community.

I have a colorbond section on a tiled roof. As seen in the photos, the way the colobond is connected to the tiles is via a piece of flashing that extends from the last ridge of the colorbond, under the adjacent tile, with a small upwards "lip" created at the end of the flashing under the tiles.

As you can imagine, under the right (wrong?) conditions, water overflows into the roof cavity and runs down the walls inside the house.

I'm considering removing this flashing, and bridging the gap instead with a suitably sized (perhaps 300mm) lead-free flashing instead, something like Smartform or Dakaflash. Is this the best long-term solution? It's a bit tideous and somewhat pricey solution, so any tips and suggestions are very welcome.

[EricL]

Hello @a_amir 

Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thanks for sharing your question about your tiles.

I propose replacing the flashing under the tiles and Colorbond roof with a wider piece of flashing so that it can accommodate a larger volume of water before it overflows. Next, I suggest making sure that the lip of the flashing properly flows into the gutter. Once you've carried out the repairs, your proposal of using either Dakaflash or Smartform is an excellent solution to preventing water from entering the gap. My best advice is to make sure you get a good solid overlap so that water does not bridge back to the gap.

Let me call on our experienced members @Dave-1 and @Nailbag for their recommendations.

If you need further assistance, please let us know.

Eric

[Dave-1]

Good Afternoon @a_amir 

Welcome to the community page And you have a good one to start off with! Well you have actually already suggested the solution, @EricL confirmed it and il add a third to it I would remove that existing flashing, install a wider flashing so the down edge is in the next gully of the tile, or even prefer strtech at a shallow angle to go over so its the second gully with something like a 15deg angle, maybe 30deg? I would do it both sides. Making sure that the top is aslso under the tiles so it gives a continuious path for the water to flow off.

Dave

[a_amir]

Thank you Eric and Dave. You've been most helpful.

Hopefully I can wrap this up before it rains again.

Cheers.

[Dave-1]

Afternoon @a_amir 

Whatever you do, please do not get up on the roof even in a light sprinkle of rain. I stood on teh roof once to hose the dirt out of the gutters when I was a very cleaver 16yo..... Almost went over the roof just from the spray wetting the tiles and as soon as I stepped on the wet tile "wooshka" only thing that stopped me was the gutter edge which I bent

Dave

[EricL]

Hello @a_amir 

I totally support @Dave-1's suggestion of safety. Please take every precaution when working at height and rent a roof harness to keep you protected.

Eric

[Nailbag]

Hi @a_amir 

I think the solution that both @EricL and @Dave-1 has suggested inline with your idea is sound. My personal preference for mostly aesthetic's, would be to replace the flashing both sides with one that rested within the valley of the side tiles as per the image below.

and just out of interest why is there colourbond instead of tiles in that area as it looks like a patch of some for.

Regards Nailbag 

[EricL]

Hi @a_amir 

Now that @Nailbag has mentioned it, why is that section of your roof in Colorbond and what is its purpose.

Eric

[a_amir]

Hi @Nailbag,

So, the flashing would run on top? That would look better IMO as well. In that case, I assume the lead-free flashing would be what holds and seals the outer edge of the flashing to the tiles?

The section covered by the colorbond was originally outside the house, and the previous owners decided to add it in. Underneath the three edges where the colorbond meets the tiles is the top of what used to be a U-shaped brick wall.

My long term plan is to hire a professional to tile the area so the roof is one continuous piece. But in the meantime I'm looking for a proper fix for the leaking; one that preferably doesn't break the bank.

I'm used to doing everything around the house myself (where legal to do so) but haven't come across this arrangement before.

Cheers.

[Nailbag]

Thats correct @a_amir  please see profile below.

Nailbag