Homely I had to google that and yes, up to 5000 houses a year have new thatch roofs put on. They're suppose to hold up better than shingle roofs and they are excellent insulators.

I thought it was thatch, N Q - but do they have those in the Netherlands?

It is a nice place, I'm trying to figure out if that's a thatch roof or if there's moss growing on it ?

Lovely place!