Liniar

• ▸Country: United Kingdom
• ▸HQ: Heanor, Derbyshire
• ▸Founded: 2007
• ▸Material: Lead-free uPVC, multi-chamber profile
• ▸Market: UK new-build, replacement windows, social housing
• ▸Climate context: UK - persistent damp, salt air coastal, urban acid rain, mould risk
• ▸Made in: Britain

• ▸Casement windows
• ▸Tilt-and-turn windows
• ▸Sliding patio doors
• ▸Residential entrance doors

Liniar profiles are designed around UK conditions - the drainage channel geometry, chamber arrangement, and seal specification reflect the persistent damp of British winters rather than being adapted from continental European specifications. The lead-free uPVC formulation uses alternative stabilisers - this is important for long-term yellowing resistance, but it also means the surface chemistry is slightly different from older lead-stabilised profiles. pH-neutral cleaning is the safe approach across all generations. Liniar's integrated dummy sash option means some windows appear to have more panels than they actually open - cleaners who are unfamiliar with the system may try to operate a dummy sash. Always check before applying any leverage.

This is how I clean Liniar 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 Liniar systems.

• ✕Do not use bleach, chlorine, or strong alkali cleaners on any uPVC frame surface
• ✕Do not use solvent-based products or acetone near uPVC profiles or rubber seals
• ✕Do not attempt to open dummy sash panels - verify which panels operate before applying any force
• ✕Do not use abrasive pads or scouring compounds on the frame face
• ✕Do not leave cleaning product residue in rebate grooves - rinse thoroughly after every clean

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