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Posted

TP have them 

Back in the day when virtually every extension and garage had a flat roof 

Limestone chippings  where used 

 

Posted
1 hour ago, SteamyTea said:

Start by asking at your local builders merchants.

(not sure why you want to cover a flat roof with stones though)

 

Our BM's have them in small bags and stupidly expensive

 

Why cover our flat roof with chippings  @SteamyTea ? We were told that they would keep the roof surface cooler.

But every roof needs maintenance - so you need to walk on it and thus risk puncturing the membrane.  When we asked the builder about maintenance - he said that the roof wouldn't need maintenace.

Yeah , right.

 

And then we asked him how we could re-point the gable wall above the flat roof without pushing the 'grit' through the membrane he went quiet.

We used specialised reflective paint on the surface instead. 

  • Like 1
Posted

I thought stone chippings were used on mineral felt roofs as a way of protecting them from UV.   Do modern roof coverings need that protection?

Posted
22 minutes ago, ProDave said:

on mineral felt roofs as a way of protecting them from UV.   

Old felt roofs used to melt in the summer sun. The chippings reflected and absorbed energy, and physically protected it against feet.

It used to be sold with a tiny grip already on it,and that would suffice for a shed. But on a flat roof tiny chippings were spread ...I think onto a bitumen sticky layer.

I think modern felts don't melt.

 

Posted

I do know said granite chips seem remarkably hard to come by.

 

Bigger, like 10mm, no problem.

Posted

Have a look at stone warehouse - basically AFAIK longstone quarry in Derbyshire.

 

We've had black granite from them - not sure how small they go.

Posted

We are looking for stone chippings to tart up the felt roof on our existing house rather than the new build. We were hoping that a few 25kg bags of chippings spread over the roof would make it less likely for the surveyor on our existing house sale to say we need a new flat roof (a common thing I have found if the roof looks a bit tired, even when it doesn't leak). 

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