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Steel lintels are recommended when using Quinn-Lite Aircrete blocks to prevent cold bridging. If full fill insulation is used in the cavity, concrete lintels can be used but metal lathing should be placed over the face of the lintel (extending 300mm over each edge) before plastering. Concrete lintels can also be used over internal doors. Lintels should bear onto a full block and should have 100mm minimum bearing at openings of 1.2m or less and 150mm minimum bearing at openings of greater than 1.2m.
