The model attached is of chemistry laboratories filling in an existing courtyard (so only the roof is exposed) but it was built with a huge area of south facing roof glazing which (predictably) leads to major overheating from late May to August whenever the sun's out - but that's not what I'm getting in my model.

The rooms reach temperatures in excess of 28°C regularly for three months of the year, but I'm getting up to 10° lower in the model, so I must have something wrong. My solar gains appear far too low in relation to the internal gains.

Apologies if the answer's already here somewhere, but I've looked hard. I'm sure it's something simple/obvious, but it's driving me slightly potty trying to find what I'd very much appreciate someone having a quick look at the model to see if the solar gains look sensible to them. Could it be an issue with the Edinburgh weather file/changing climate?

Thanks,

Al