Loewen Windows

• ▸Country: Canada
• ▸Founded: 1905
• ▸Facility: 600,000 sq ft custom manufacturing, Steinbach, Manitoba
• ▸Primary materials: Timber, aluminium-clad timber, full aluminium
• ▸Sizing: Bespoke custom sizing - no standard catalogue
• ▸Market: Luxury residential, architect-specified, US and Canadian high-end builds
• ▸Market tier: Luxury
• ▸Website: loewen.com

• ▸Timber windows and doors
• ▸Aluminium-clad timber windows
• ▸Full aluminium windows and doors
• ▸Lift and slide doors
• ▸Pivot doors

The timber-aluminium junction on Loewen clad windows is unique in Canadian manufacturing. The aluminium cladding is mechanically fixed over the timber frame with a designed gap to allow for timber movement with humidity and temperature change. Water sitting in this junction - from pressure washing, over-wetting the frame, or blocked drainage - wicks into the timber core and begins rot from the inside out. Loewen powder coat finishes are specified to high standards but they are applied over shaped aluminium profiles with corner radii and joints that collect cleaning product residue. Residue left in these joints discolours the finish over time and is difficult to remove without abrasion. Manitoba winters are extreme - temperatures regularly fall below minus 30 degrees Celsius. Freeze-thaw cycling through spring puts significant stress on all seal and junction points. The cleaning visit following the first spring thaw is the most important diagnostic visit of the year on Loewen windows.

This is how I clean Loewen Windows windows. The tools and technique below come from 25 years of daily professional work on the glass. Every step has been tested on real installations and adapted specifically for Loewen Windows systems.

• ✕Do not pressure wash Loewen windows - high-pressure water forces moisture into the timber-aluminium junction and begins internal timber rot
• ✕Do not use acid-based glass cleaners near any timber or aluminium junction - acid attacks both materials
• ✕Do not use abrasive pads or steel wool on powder-coated aluminium cladding
• ✕Do not wet the interior timber frame - use barely damp cloths only and dry immediately
• ✕Do not leave cleaning solution residue in cladding joints or frame channels
• ✕Do not ignore glazing seal cracks after winter - on a Loewen triple-pane unit, a failed seal is an expensive replacement
• ✕Do not use solvent-based cleaning products on any part of a Loewen timber window

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