Sandtoft 20/20 tiles around Velux Windows 15 Degrees

[eselim9175]

Can someone please help with their opion on these freshly installed tiles around Velux windows. At the very least does not look neat, but is there are risk of leaking here. The tiles are kicking up so much at the sides it looks like a problem just waiting to happen when there is heavy rain.

 

[Stevemac123]

Im having the same problem but yours look worse, they need trimming and smarting up, but you will get some kick, take alook at mine

 

[catlad]

Did you have any problems?

 

[Koolpc]

Yikes!!!!!

 

[Ollyfp]

Sorry to wade in, but that's a horrible job. The 'roofer' has used the incorrect flashing kit for starters. The corrugated apron is intended for high-profile tiles. Yours are flat.
There's definitely a risk of water ingress and this needs sorting asap.

 

[Ollyfp]

With such a low pitch, your tiles need to be fitted really well. I recently added a dormer with a 17° pitch using similar tiles. The manufacturers recommend counter battening and additional overlap to guard against driving rain.

 

[aveatry]

Yes you need the correct flashing kit for the tiles. As ollyfp says.

 

[aveatry]

With such a low pitch, your tiles need to be fitted really well. I recently added a dormer with a 17° pitch using similar tiles. The manufacturers recommend counter battening and additional overlap to guard against driving rain.

Do you mean so the battens are effectively double height so there is no kick up at the velux

 

[Ollyfp]

Do you mean so the battens are effectively double height so there is no kick up at the velux

With a low pitch, you need to make sure that any water that might get past the tiles can run down the membrane and out into the gutter. That's where counter battening comes in. I'd fix OSB to the rafters, then the Tyvek, then low profile vertical battens, then the usual horizontal battens and then the tiles. If fitted correctly, there should only be a very slight kick in the tiles each side of the Velux.

 

[Ollyfp]

Like this...

 

[Ollyfp]

And this is what you're aiming for...

 

[aveatry]

And this is what you're aiming for...

Nice.
But why the osb

 

[Ollyfp]

OSB keeps the Tyvek flat, which helps to shed water over the eaves protectors. Usually you'd leave the Tyvek (VPM) to sag slightly between the rafters to act as a water channel, but with a very low pitch between 10 and 20 the water doesn't run fast enough and can build up in folds and creases.
The use of OSB is also specified for high wind areas such as Scotland.

 

[noseall]

As said - wrong and incorrectly fitted flashing kit. Either that or the unit has been fitted on the wrong lugs.

 

[Dereekoo]

And this is what you're aiming for...

Ditto, and this was done with standard battening