Half tile bottom row.

pads1111 · 24 Jan 2020

Hi everyone,
I’m at the roofing stage of my extension... it’s a single story rear extension with a pitched/lean-to roof.
I’d like to do the roof myself if possible and hopefully someone can point me in the right direction.

the tiles on the roof are Marley modern flat tiles, when researching I’ve noticed that some roofers do a full course of half tiles on the first row then a row of full tiles sat on top. Is it essential for the half tile and if not what’s it for?

thanks for any help.

Lower · 24 Jan 2020

Tiles are designed to lie on top of another tile with the tile underneath it filling the gap between that tile and one adjacent to it. The bottom row of tiles needs to sit on top of another tile in exactly the same way but that tile underneath needs to be smaller so that the roof finishes in the right place.

if you didn't have the half tile there would be a gap between the tiles in the bottom row that water could run straight through.

palaceray · 24 Jan 2020

With Marley Modern tiles you do not have the half tile.

The half is called an eave tile and is there to weather the joint in the first course of plain tiles or slates.
It is not required with interlocking tiles.

pads1111 · 24 Jan 2020

Thanks palaceray,

that’s why I was confused because unless the headlap was more than half the tile below, there would always be a joint that didn’t have a tile underneath.
Much appreciated for clearing that up!
On the bottom row of tiles do I put a batton about a 100mm up from the fascia board so the bottom tile has the same pitch as the rest of the roof or does it sit on top of the fascia board?
Thanks mate.

Alastairreid · 25 Jan 2020

It should sit in plane on top of the fascia board.

pads1111 · 25 Jan 2020

@Alastairreid ok thanks al, much appreciated

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Half tile bottom row.

pads1111

Lower

palaceray

pads1111

Alastairreid

pads1111

DIYnot Local

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