Double roman tiles on low pitch roof.

[xdrive]

Hi. I have a 15 degree pitched roof on extension.

On my main roof I have sandtoft double roman tiles.
I want to use matching tiles on extension.

The minimum headlap for tiles on a 17.5 degree pitch is 100mm. For a 22.5 degree it's 75mm.

Technical spec says 120mm maximum headlap but doesn't mention pitch so I'm assuming minimum pitch for the sandtoft double roman are 17.5 degrees

Would the tiles be OK on a 15 degree pitch with a 120mm headlap? Don't get much driving rain around back.

I was going to use Redland regent tiles as they go down to 12.5 degrees however they are like rocking horse poo.

I don't want to plyboard, felt and cross batten as it thickens the roof which doesn't look too clever.

Cheers

 

[^woody^]

Tiles won't be approved below their stated 17.5° pitch, no matter what head lap.

You can board and counter batten, and design the eaves and verge to appear as a standard roof and not be visibly thicker. It will be slightly higher with potentially greater distance from frame heads to soffit, but won't appear thicker.

 

[xdrive]

Ended up using marley mandip double roman. Go down to 12.5 degree pitch and blend in nicely with roof tiles.

 

[noseall]

Marley Mendip all day.

 

[noseall]

Ended up using marley mandip double roman. Go down to 12.5 degree pitch and blend in nicely with roof tiles.

Just 'Marley Mendip'.
No need to write double Roman (confusing).

 

[^woody^]

Just 'Marley Mendip'.
No need to write double Roman (confusing).

Marley Mendip Standard or Marley Mendip 12.5. It's confusing

 

[xdrive]

Marley mendip double pantile is what I meant.

Just got to give @noseall & @^woody^ huge shout out. You guys have helped turn a basic DIYer into a "builder"

I've completed my rear single storey extension to a high standard. Did pretty much everything from beginning to end.

Now doing front porch.

Also thanks to all members who have been supportive.

Awesome forum.

 

[noseall]

Marley Mendip Standard or Marley Mendip 12.5. It's confusing

View attachment 280039

Yeah and there are caveats with very low pitches including max rafter length and simplicity of roof design, i.e. zero interruptions, smooth tile, 100mm min head-lap etc .