Porotherm Time Lapse - Porotherm UK

Porotherm is unique clay block walling system; precision engineered and utilised in the same way as traditional block work but faster & more cost effective.
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Website: www.PorothermUK...
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[@RebelofIreland]

Does it have to have concrete slabs at top of first floor? Or for a residential 2 story would wooden beams be ok?