We’d noticed that some panes of the new conservatory glass had stickers on the outside, and some on the inside. Well – the glue from the stickers, as the labels themselves had been scraped off. Fortunately I’d taken a photo of the glass when it was on the pallet, because, well, you never know when photos will come in useful.
The information on the stickers themselves made absolutely no sense:

Now, what would you think (the bottom line of) that meant?
When we asked the roof boss man about this 10 days ago, he said it didn’t matter which side faced out, but we were unconvinced, so, when Mr BW got back from his week away, he sent an email to the window manufacturing company.
And so it came to pass that a window man turned up this morning to turn 6 panes around to be the same way as the other panes. And all was well. Well, we hope so.
The roof men have now finished. Almost all is now good, and Mr BW can polish the bits that aren’t. As well as do all the other jobs that need doing before the carpet is laid on Tuesday.
However, as one workman job finishes, another re-opens… some of the composite ‘slates’ on the summerhouse/museum roof have changed colour in the 15 weeks since they were installed.
Apparently there were some rogue batches that didn’t have UV stabiliser put in. Why, oh why, are we always the ones to get the rogues?

Ian
Personally I like the contrast of the rogue coloured tiles, but I can understand that you may prefer a uniform look
Blue Witch
Ian – the problem is that without the correct UV stabiliser in them, the tiles will beome brittle and will fracture/disintegrate over time as well as further lighten in colour. Recycled plastics are all very good and environmentally responsible IF they are formulated correctly.
Tim – if you read this, these are (I suspect) the same tiles you have on your new conservatory roof (they are what the company we both used use as standard), and yours were installed at around the same time that the tile manufacturers had this batch problem, so do keep an eye on them.
Tim W.
I’ve read it (thank you!) and been outside to check. All looks good at the moment. We had a terracotta colour, which might make discrepancies more difficult to detect. We’ll see!
Blue Witch
Tim – it becomes apparent very quickly once it starts happening – but only shows when it is dry not when it is damp or wet. It might only have been the ‘black’ (which are actually dark grey) ones, or it might have been an employee who got the recipe wrong on different batches of different colours. As you say, we’ll see!