Rainscreen substructure and sealing

How a ventilated façade is fixed back: brackets, profiles and seals.

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FX-RS / FX-SBRainscreen Substructure & Sealing

Aluminium subframe, isolators, fixings and sealing for ventilated façades.

Rainscreen substructure section with callouts

FX-RS substructure
Component	Material	Notes
Wall brackets	6063 / 6005A- extrusion	Fixed and sliding points; sized to load
Carrier profiles	T · L · top-hat, 6063 / 6005A-T6	Break at floors; leave thermal gaps
Thermal isolators	EPDM · polyamide pads	Reduce thermal bridging at brackets
Cassette hooks & pins	Stainless A2 / A4 · aluminium	For hook-on cassette systems
Stiffeners	Aluminium angle or top-hat	Bonded with structural tape / adhesive

FX-SB sealing & bonding
Sealing & bonding product	Use
EPDM gaskets & tapes	Joint and profile sealing, anti-rattle
Structural acrylic foam tape	Stiffener and panel-to-frame bonding
Silicone weather seal	Movement joints — ASTM C920 Class 25 / 50
MS-polymer adhesive	Elastic bonding and sealing
Backer rod	Closed-cell PE; sets sealant depth

ΔL = α × L × ΔT

Aluminium expands ≈ 0.024 mm per metre per °C: a 3 m profile moves ≈ 4.3 mm over a 60 °C range. Fix at one point and slide at the others.