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    Technical tips: underlays and ventilation

    When it comes to advice on roofs, one of the most common contractor queries received by Marley’s technica ...

    When it comes to advice on roofs, one of the most common contractor queries received by Marley’s technical services helpline is on underlays and ventilation. Jamie Riddington from the technical team s ...

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    Klober’s air permeable underlays

    ­­­­The British Standard for slating and tiling now recognises that air permeable underlays can take the ...

    ­­­­The British Standard for slating and tiling now recognises that air permeable underlays can take the place of ventilation in a cold roof – as long as that underlay meets minimum performance standa ...

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