Slate is a natural material, quarried from sedimentary rock, they tend to be 
very smooth and not overlap too much. Usually found on older buildings, are 
rare on modern buildings unless they are in a conservative area and need to fit 
in.
https://en.m.wikipedia.org/wiki/Slate#/media/File%3ASt_Fagans_Tannery_7.jpg

Tiles are moulded from clay and are designed to lock together and overlap. 
Common on more modern buildings.
https://en.m.wikipedia.org/wiki/Roof_tiles#/media/File%3ARoof-Tile-3149.jpg

Phil (trigpoint)

On 10 March 2023 18:53:09 GMT, Timothy Noname <[email protected]> wrote:
>How are slate roof tiles totally different to roof tiles?
>They are both manufactured to a certain size and laid in an overlapping
>pattern?
>
>On Fri, 10 Mar 2023, 17:19 Philip Barnes, <[email protected]> wrote:
>
>> On Fri, 2023-03-10 at 16:01 +0000, Timothy Noname wrote:
>> > Slate roof tiles
>> > roof:material=slate
>> > Or
>> > roof:material=roof_tiles
>> >
>> > I admit I've used both in the past.
>>
>> Tiles are totally different to slates, I would never consider a slate
>> to be a tile.
>>
>> Other than being used for roofing, they are different and easily
>> identified.
>>
>> Phil (trigpoint)
>>
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