This insulated box lintel from Keystone Lintels Ltd is manufactured from galvanised steel and measures 2250mm in length with a height of 150mm. Designed for general building applications, it is suitable for supporting masonry work over door and window openings.
The box lintel format provides structural support in cavity wall construction with typical wall widths ranging from 100mm to 215mm. Its built-in insulation helps reduce thermal bridging at reveals, making it a practical choice for new builds or refurbishment projects requiring thermal efficiency as part of the wall support system.
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