Difficulty finding a particular size of roof sheet

[Rollerball]

I have an old outbuilding which had part of an old (maybe asbestos?) roof sheet ripped off during Storm Darragh.

My roofer is having difficulty finding a replacement sheet due to the profile of the existing sheets.

When he measured it up I wrote down the profile which he stated was 'one and three quarter inches, 2 and 6'

The existing sheets are the sinusoidal type, not trapezoidal.

So if I'm calculating that correctly it's a 6 inch pitch, not sure about the other two measurements though. I remember when he measured it he used a flat edge to get what I assume is the depth (2) but I'm not sure about the 1 and 3/4 measurement.

I've done my own searching online but have come up with nothing. Which roofing suppliers are likely to carry this?

 

[Harry Bloomfield]

When he measured it up I wrote down the profile which he stated was "one and three quarter inches, 2 and 6"

That makes no sense to me. Corrugated sheets, are measured from the top of one peak to the next, and the height of the corrugation. The measurements, are in metric, although corrugated is usually imperial sizes. 146mm peak to peak, is almost 6"

 

[Rollerball]

That makes no sense to me. Corrugated sheets, are measured from the top of one peak to the next, and the height of the corrugation. The measurements, are in metric, although corrugated is usually imperial sizes. 146mm peak to peak, is almost 6"

I see - well, I'm even more confused now.

Perhaps I'll go and measure it myself soon.

Any tips on how best to do that?

BTW, I believe he was looking to replace the broken sheet with a fibre cement sheet. Needs to be very strong due to my fairly exposed location.

 

[Harry Bloomfield]

Any tips on how best to do that?

Measure across several corrugations, then divide, by the number of corrugations you measured across - you get a more accurate measurement that way.

 

[noseall]

I have an old outbuilding which had part of an old (maybe asbestos?) roof sheet ripped off during Storm Darragh.

My roofer is having difficulty finding a replacement sheet due to the profile of the existing sheets.

When he measured it up I wrote down the profile which he stated was 'one and three quarter inches, 2 and 6'

It's 'Big 6' surely?

I've done my own searching online but have come up with nothing. Which roofing suppliers are likely to carry this?

Here.

 

[Rollerball]

Thanks for the link - is 'Big 6' the common term for that size?

 

[noseall]

Thanks for the link - is 'Big 6' the common term for that size?

Yes. Big 6 is well known throughout agricultural circles. Google it.

 

[Rollerball]

Just re-checked the measurements of my roof sheets - the pitch appears to be 146mm while the profile depth is about 50mm, maybe a tad under.

 

[Harry Bloomfield]

Just re-checked the measurements of my roof sheets - the pitch appears to be 146mm while the profile depth is about 50mm, maybe a tad under.

Which seems to match this - https://www.briarwoodsupplies.co.uk...fibre-cement-profiled-sheets-in-juniper-green

 

[wagster]

I have an old outbuilding which had part of an old (maybe asbestos?) roof sheet ripped off during Storm Darragh.

My roofer is having difficulty finding a replacement sheet due to the profile of the existing sheets.

When he measured it up I wrote down the profile which he stated was 'one and three quarter inches, 2 and 6'

The existing sheets are the sinusoidal type, not trapezoidal.

So if I'm calculating that correctly it's a 6 inch pitch, not sure about the other two measurements though. I remember when he measured it he used a flat edge to get what I assume is the depth (2) but I'm not sure about the 1 and 3/4 measurement.

I've done my own searching online but have come up with nothing. Which roofing suppliers are likely to carry this?

Try tecron.ie in Galway - used to be Newell Roofing. They do a lot of corrugated roofing sheets.