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3180EA (400mm) = 400mm x 22mm x 20mm. Equivalent Area (Airflow) The 300mm vent provides 2328mm2, whilst the 400mm vent provides 3180mm2. These window ventilators by RW Simon, reduce the chance of mould, condensation, and water vapour in the air, by increasing the airflow.
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It is particularly important to treat areas of newly installed lead that are subject to water flowing over the surface onto surrounding areas as staining of tile and brick will be more severe in such circumstances.
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It is particularly important to treat areas of newly installed lead that are subject to water flowing over the surface onto surrounding areas as staining of tile and brick will be more severe in such circumstances.
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Lead sheets in various sizes.
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Lead sheet 31 inch x 36 inch 79 cm x 92 cm approx Code 4 lead and treated with patination oil.
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(copper, tin, antimony, etc) in the lead. Lead is a natural product which, when exposed to the air, can discolour due to oxidisation. 12" Lead Flashing Roll for Lightweight Applications. Versatile and Lightweight - for soakers and flashing.
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