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  • It's safe to say that cutting 100mm PIR can get in the sea

    Ugh, the thought of it sends shivers down my spine. Nice idea with the tracksaw. With a dust extractor connected too? If I ever have to do that kind of thing again I'll give this a go. I found cutting to exact size too time consuming so I ended up deliberately undersized by 10mm and then expanding foamed around all the edges later.

    Re the overhang, I'd consider making it a little longer if you don't have a compelling reason not too, it will really help keep the front of the building dry. With 365mm I think you'll get splashback from rain hitting the floor, and direct rain in mild wind.

  • How long do you reckon is long enough?

    I'm constrained by height (the longer the overhang, the higher it is), and how much overhang 2x5 can support.

    (And, to a insignificant extent, overall weight increase).

    I've drawn it up with a 100mm overhang, which is starting to look a bit unbalanced.

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