These aluminium thermal windows exhibit clean external lines, yet conceal a sophisticated insulation system.

Reynaers Masterline 8 windows are available in three options to suit high-insulation, low-energy, or Passive House buildings (certified by the Passivhaus Institute). The frame shape remains constant, with varying insulation levels being achieved with internal thermal break materials and seals.

Benefitting from top-class air and water tightness and Secured By Design (SBD) approval, Masterline 8 windows allow excellent daylight ingress thanks to the slimline frame.

These single swing thermal windows open inwards or outwards, and can be double or triple glazed. Hinging is equally versatile - side or top hung, tilt-only or tilt and turn.Anodised or RAL colour finishes ensure the individuality of each installation.


Product guidance - As Standard
Min. Visible width frame-vent: inward opening 97 mm
Min. Visible width frame-vent: outward opening 133 mm
Min. Visible width T-profile 80 mm
Max. height vent 2800 mm
Max. width vent 1700 mm
Max. weight vent (element)Turn-tilt 200 kg
Overall system depth frame 77 mm
Overall system depth vent 87 mm
Rebate height 27 mm
Min. Glass thickness vent 13 mm
Max. Glass thickness vent 72 mm
Product specification
Double glazing 1.3 W/m²K (depending on the frame/ vent combination and glass unit specification).
Triple glazing 1.0 W/m²K (depending on the frame/ vent combination and glass unit specification). Inward and outward opening casement windows.
Glazing method Drained and ventilated glazing with EPDM synthetic rubber gaskets.
Finishing Choose from a full range of polyester powder coat colours and anodised finishes.
Dual colour Dual colour available offering a different colour inside and out.
Profile assembly Weather stripped profiles with polyamide thermal breaks.
BRE rating Corresponds to the BRE Global Green Guide online generic specification for windows and achieves a summary rating of A, Element Number 1231500007.
Security Meets the very stringent requirements to be awarded the Secured By Design accreditation.
Air permeability Up to 600 Pa (class 4).
Wind load resistance Up to 2000 Pa (class 5).
Water tightness Up to 600Pa (class 9A).
Acoustic performance Rw (C;Ctr) = 36 (-1;-4) dB/ 44 (-2;-5) dB, depending on the glazing type.
CAD Drawings
Reynaers Master Line 8 Window and Door System
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