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Europe ยท Window Manufacturer

Lian Trevarefabrikk โ€” Window Cleaning Guide

๐Ÿ‡ณ๐Ÿ‡ด Norway ยท Last reviewed by Justin Orloff

lian-trevarefabrikk windows

Quick Facts

Founded

Established Norwegian manufacturer

HQ

Leksvik, Norway

Materials

Traditional Scandinavian timber

Specialty

Traditional timber windows and doors

Market

Norway (Dovista/VKR Group)

Brand at a Glance

  • Part of Dovista/VKR Group - one of Europe's largest window groups
  • Traditional Scandinavian solid timber construction
  • Built for Norwegian cold, frost, ice and coastal conditions

Product Range

  • Timber casement windows
  • Timber tilt-and-turn windows
  • Exterior timber doors

Why This System

Lian Trevarefabrikk represents the traditional Norwegian timber window - no aluminium cladding, just solid wood with a quality surface finish. This gives a warm, authentic Nordic appearance but demands careful maintenance and cleaning to protect the paint or stain from water damage.

Unclad timber is the most sensitive window frame material in our work. Water forced into joints, aggressive brushing or wrong cleaners all shorten the life of the finish. At Orloffs we treat every Lian Trevarefabrikk window as a heritage clean - minimum water contact time, soft brushes, and a final dry pass on every frame.

Step 1 of 2: Manufacturer Recommendations

Official Care Guidance

No official guide published. The steps below are based on Justin Orloff's 25 years hands-on experience with this system.

Step 2 of 2: The Orloffs Protocol

The Orloffs Protocol

This is how I clean Lian Trevarefabrikk 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 Lian Trevarefabrikk systems.

Pro Tools

My daily tool list. This is what I carry to every job.

1Microfiber T-bar applicator, kept clean and rinsed regularly to prevent grit
2Professional squeegee with a fresh rubber blade
3Extension pole for glass above arm height
4Bucket with at least 10 litres of water and enough soap for cleaning power without excess foam
5100% cotton towelling rags for edge detailing
6Vacuum for sill tracks and base profiles

Follow these steps in order. Each one builds on the last. This is the same sequence I use on every Lian Trevarefabrikk installation.

  1. 1

    Preparation -- before any water touches the glass

    Fill the bucket with at least 10 litres of water. Add soap for cleaning power -- enough to cut through environmental deposits, not so much you are fighting foam.

    Before touching the glass, brush down the surface to remove loose dust, spiderwebs, and debris. Any grit left on the glass during the wash phase risks scratching during agitation.

    Check the timber frame condition before you start. Confirm which cleaning product is safe for that surface before opening any bottle.

    Cover anything below the windows that cannot be moved.

  2. 2

    Agitation -- apply and work the solution

    Dip the microfiber T-bar completely into the soap water, both sides. Remove excess water with your hand so it does not drip. Apply the solution across the entire glass surface with overlapping passes.

    The goal is to fully dissolve and release every deposit from the glass surface. Anything not released during agitation gets transported across the glass by the squeegee as a smear.

    For stubborn spots -- insect marks, salt residue, environmental deposits -- re-apply soap water and allow it to soak for a full minute before agitating again. Use more soap water, not more pressure.

    For panels above arm reach: attach the T-bar to an extension pole. Work in sections -- top first, then middle, then bottom -- keeping each section wet until you squeegee it.

    Rinse the T-bar cover regularly during the job. A dirty applicator causes microscopic scratches that accumulate over time.

  3. 3

    Detail the frame edge before squeegeeing

    Use your 100% cotton towelling rag, finger pressed into the fabric, to work into every junction and remove pooled soap water before the squeegee pass.

    This prevents drips running down onto already-cleaned areas during squeegeeing and keeps soap water out of drainage channels.

    On Lian Trevarefabrikk timber frames, pay particular attention to the bottom edge where glass meets the frame sill -- water pooled here runs into drainage openings and leaves residue over time.

  4. 4

    The squeegee

    Tilt the squeegee at a slight angle so soap water spills from one side of the channel only -- not both. If the rubber is jumping or squeaking, either the rubber is not lubricated enough or the glass surface has warmed.

    Cutting in: start with the rubber blade making first contact on a dry edge of the glass.

    Side to side: horizontal passes across the panel. Works well on wide sections. Top to bottom: vertical passes down the panel. Works well on tall narrow sections.

    The J tune: one smooth unbroken motion top to bottom, wrist rotating at each end to reverse without lifting the rubber. The most efficient method on larger panels -- but it requires training before applying it to premium glass.

    Wipe the rubber dry after every pass. Overlap each stroke by 2-3 cm.

  5. 5

    Final edge detailing

    After squeegeeing, there is always a residual line of water along the bottom edge and at the panel sides. Take a dry cotton rag, fold to a clean corner, and detail these edges in one smooth pass.

    On Lian Trevarefabrikk frames, the bottom edge where glass meets the sill requires the most careful attention. Water left here runs into drainage and leaves residue that affects the next clean.

    Rotate the rag to a clean section after every pass. If the rag picks up grit at any point, replace it immediately.

  6. 6

    Frame wipe and hardware check

    On Lian Trevarefabrikk timber frames: use a barely damp cloth and dry immediately. Never allow water to sit on timber joints or frame corners -- moisture causes swelling and paint failure.

    Check that all drainage openings are clear and unobstructed. Water must be able to flow freely -- a blocked channel leads to accumulation that affects seal performance over time.

    Operate every opening window through its full range. Stiff handles or resistance at locking points indicate hardware that needs lubrication. Flag it to the owner rather than forcing it.

Watch the Window Cleaning Manifesto hereSee these techniques in action. Free, 5 minutes, lifetime access.

Pro Tips

  • If paint is flaking or joints are open, advise the owner before cleaning - water entry causes hidden rot
  • Traditional Norwegian timber windows often have older glazing putty - clean gently around the glass edge
  • Spring pollen can combine with moisture to create a sticky residue on painted surfaces - rinse fully before brushing

What NOT To Do

  • Do not use a pressure washer at any setting on unclad timber frames
  • Do not allow cleaning solution to sit on painted surfaces
  • Do not use abrasive pads or scourers on any timber surface

Bundle Kits and Tool Recommendations

Bundle Kit

Orloffs Squeegee Pro Pack flat lay
Pro KitThe full professional setup. Brass squeegees, T-bar with applicator cover, tool belt, rags, soap, and bucket. Everything from the daily tool list in one box.Shop now โ†’
Orloffs Squeegee Pro Pack bundled

Cleaning Frequency

Twice yearly minimum. Heritage or unpainted timber frames may need annual inspection as well as cleaning.

Frequently Asked Questions

How often should I clean Lian Trevarefabrikk windows?
For Lian Trevarefabrikk windows, Twice yearly minimum. Heritage or unpainted timber frames may need annual inspection as well as cleaning.. Coastal or urban locations may need more frequent cleaning.
What tools do I need for Lian Trevarefabrikk windows?
Professional cleaning of Lian Trevarefabrikk windows requires my daily tool list of: Microfiber T-bar applicator, kept clean and rinsed regularly to prevent grit, Professional squeegee with a fresh rubber blade, Extension pole for glass above arm height, Bucket with at least 10 litres of water and enough soap for cleaning power without excess foam, 100% cotton towelling rags for edge detailing, Vacuum for sill tracks and base profiles.
What should I avoid on Lian Trevarefabrikk windows?
Do not use a pressure washer at any setting on unclad timber frames
Does Lian Trevarefabrikk publish an official cleaning guide?
Lian Trevarefabrikk has not published an official cleaning guide. The protocol on this page is based on Justin Orloff's 25 years hands-on experience.
Can I use a water-fed pole on Lian Trevarefabrikk windows?
Yes, purified water via a water-fed pole is one of the safest methods for Lian Trevarefabrikk glass. Ensure TDS is at or near zero before use and avoid directing high-pressure water at seals or gaskets.

Field Notes

โ€œLian Trevarefabrikk windows appear most often in traditional Norwegian homes - often with deep reveals and small-pane casement configurations. Deep reveals mean the inner frame and sill collect more debris than flush modern systems. Budget extra time per window on heritage properties.โ€

Justin Orloff