DL489 – Fluid Glass X Aluminium Bifold Door – Base Details: Non-Level and Level Threshold

Price range: £9.00 through £14.00 + VAT

This detail provides two base installation options for a three-leaf Fluid Glass X aluminium bifold door system, each using a visible external frame located in line with the outer brick leaf. Both details demonstrate compliant masonry construction, supporting a thermally insulated concrete ground floor and addressing common performance and drainage challenges.

DL489A shows a non-level threshold condition where the external paving is set below the internal floor level, sloped away from the door. The reinforced concrete slab extends into the threshold zone, with a perimeter insulation upstand to reduce thermal bridging. Additional components include a concrete plinth or high-density blockwork support and optional DPC under the frame.

DL489B depicts a level threshold arrangement with paving slabs installed on adjustable pedestals. The detail maintains the same floor insulation and slab build-up but relies on a raft foundation design to the structural engineer’s specification. The pedestal system allows for external drainage clearance and is recommended to sit at least 75mm below DPC level.

The visible frame position offers ease of installation and replacement, though it is not the most efficient for thermal performance. These drawings are supported by the associated elevation, which shows the full door configuration.

Features of this detail: bifold door base detail, level threshold, non-level threshold, visible frame, reinforced concrete slab, perimeter insulation, adjustable pedestals, concrete plinth, cavity wall, ground floor insulation

£14.00 + VAT
£9.00 + VAT
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01 Jan26 DL485-493 Fluid Glass Set

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