Aluminium Window SL 68 Slim Line System

SL 68 slim line window is a highly insulated system for outward opening windows, which meets the highest requirements concerning safety and stability. It is suitable for use in residential as well as commercial properties, and this window maximizes the glass area to let in lots of natural daylight.

Features and benefits:

  • Outward opening internally or externally glazed casement window.
  • Drained and ventilated glazing with ethlylene propylene diene monomer (EPDM) synthetic rubber gaskets.
  • Choose from a full range of polyester powder coat colours and anodized finishes.
  • Dual colour available offering a different colour inside and out.
  • Weather stripped profiles with polyamide thermal breaks.
  • High insulation variant available.
  • Ten-year systems guarantee provided as standard.
  • Corresponds to the BRE Global Green Guide online generic specification for windows and achieves a summary rating of A, Element Number 1231500007.
  • 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 2400 Pa (class CE2400).
  • Water tightness: Up to 600 Pa (class 9A).
  • Acoustic performance: Rw (C;Ctr) = 36 (-1;-5) dB/ through to 47 (-2;-7) dB, depending on the glazing type.

Thermal insulation (to BS EN 10077-2):

  • Double glazing: 1.4 W/m²K (Uw depending on the frame/ vent combination and glass unit specification).
  • Triple glazing: 0.99 W/m²K (Uw depending on the frame/ vent combination and glass unit specification).


PAS 24:2016 (UK Secured By Design Standard).


  • Fixings must ensure the window is retained securely within the opening without damage or distortion to the window frame.
  • Generally, fasteners should be positioned 150 mm from each corner and each mullion/ transom, and at centres not exceeding 600 mm.

General information


As drawing

Insert reference.

As schedule

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Uniclass 2015

Pr_30_59_98_02 Aluminium window unitsPrimary


L10/25 Aluminium windows

L10/330 Aluminium windows

Specification data - Aluminium window units

Product Reference

Aluminium Window SL 68 Slim Line System




Insert requirements: Top or side hung projecting, top or side hung.


As drawing

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As schedule

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Polyester powder coated




Insert requirement from 'Options' below.


Insert requirement from 'Options' below.

Glazing details

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Handle colour






Remote operation

Trickle ventilator

Window restrictor

Standard product features


68 mm.

Frame and components:

  • Aluminium profiles extruded from EN AW-6060 (AlMgSi0.5 F22) aluminium alloy to comply with BS EN 573-3 and BS EN 573-4.
  • Designed and manufactured to comply with BS 4873.
  • Vent frame members are 68 mm front to back and mitre cut at 45°. All corner joints are assembled with screwed corner cleats, thermal corner supports and rebate supports and glued. All joints are glued sealed during fabrication against water entry. Consult manufacturer for details.
  • Profiles are insulated with polyamide strips, 25% glass fibre reinforced to BUtgb approval, separating the internal and external faces, mechanically jointed and glued to form a single compound profile with a minimum shearing force of 30 N/mm (statistic average).
  • Dry glazed to accommodate a wide range of double and triple glazing units with internal clip-in aluminium glazing beads.
  • Extruded synthetic rubber ethlylene propylene diene monomer (EPDM) weather-stripping gaskets to DIN 7863 and ISO 3934, set in undercut grooves in the frame and vent.
  • CE marked, and fully compliant with the EU Construction Products Directive (CPD) to the relevant product standard BS EN 14351-1 for windows and doors and BS EN 13830 for curtain walls.
  • Reynaers Aluminium guarantees that the Reynaers Aluminium systems meet the technical specifications and standards of the country and the product in question. The current processing and maintenance regulations mentioned in the Reynaers Aluminium catalogues determine the extent of this ten-year guarantee (five-year guarantee for wearing parts). Consult manufacturer for details.


Standard handles, powder coated.

Product Options

Maximum vent size (h x w):

1300 x 1200 mm.


  • Profiles powder coated in a range of RAL or ‘Coatex’ colours to APA Qualicoat standard or BS EN 12206-1.
  • Anodized in satin or bronze colours to EWAA/ EURAS-Qualanod standard or BS 3987.
  • Profiles can be finished with different internal and external colours, powder coated or anodized.


  • Up to 43 mm thick double or triple glazing options. Contact the glass supplier for details of the glazing unit including, spacer type and dimension, glass type (emissivity, safety, solar, g value and energy factors), thickness and weight.
  • Glass to be set against extruded ethlylene propylene diene monomer (EPDM) rubber gaskets retained in undercut grooves within the aluminium profile and clip-in glazing beads.

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