BarnGirl chose the Prima Ultra grade, which, in the slate world, basically means 'first dibs' ie first in the quarry to cut out the best grade possible, with as few pyrites* as possible.
See what you think?
Meanwhile, the BarnBoys worked on the inside, preparing hundreds of mini batons to put in between the rafters. I think this is to create a pocket of air between the Tyvek on the roof and the very thick insulation to be cut n stuffed in the gaps created by the rafters.
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| The 'John Friedas' are back to blow-dry the walls after all the rain. |
Love
BarnGirl
xx
If you're interested.....
*Pyrites
The mineral pyrite, or iron pyrite, also known as fool's gold, is an iron sulfide. This mineral's metallic luster and pale brass-yellow hue give it a superficial resemblance to gold hence the well-known nickname of fool's gold. The color has also led to the nicknames brass, brazzle, and Brazil, primarily used to refer to pyrite found in coal.
Tiles made of natural slate have been used extensively throughout the UK. They offer a relatively light, impermeable roof covering, that readily sheds water with a very traditional appearance.
Roofing slates come in a wide range of colours that are mainly blues, greys, blacks and greens. The colour and texture is a reflection of the natural origin of the slate and varies from deposit to deposit and also within individual quarries. Similarly the quality of the tiles can vary substantially.
Recently there has been an increase in the interest of the presence of pyrite within slates. Pyrite (FeS2) is a mineral that can occur naturally in slates. Weathering of pyrite can result in the formation of iron oxide causing unsightly rust stains on the surfaces of tiles and runoff water or degradation due to expansive oxidation of pyrite.
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