Primus Group

Quick Facts

Brand at a Glance

Product Range

Why This System

Step 1 of 2: Manufacturer Recommendations

Official Care Guidance

Glass

• ✓Pre-rinse glass surfaces with clean water before applying cleaning solution in dusty or high-mineral-deposit conditions.
• ✓Clean south-facing glass in the morning or late afternoon to avoid solution evaporation in direct midday summer sun.
• ✓pH-neutral glass cleaner in warm water. Microfibre T-bar and professional squeegee.
• ✓Edge wipe in rebate groove before final squeegee pull.

Frames

• ✓pH-neutral solvent-free PVC cleaner on damp cloth. Do not apply to hot PVC in direct sun - move to shaded face first.
• ✓Use soft tools only. Hot PVC surface in summer marks more easily than cooler PVC.
• ✓Clear all sash drainage slots at every clean.
• ✓Check and clear the cill junction of mineral deposits that accumulate faster in the Balkan climate.

Hardware

• ✓Lubricate all moving hardware twice yearly in Bulgarian climate conditions: spring and autumn.
• ✓Use a lubricant with a wide operating temperature range - standard light machine oil may thin excessively in summer peak temperatures.
• ✓Wipe hardware with damp cloth and dry at every clean. Mineral dust in hardware mechanisms is abrasive.

Step 2 of 2: The Orloffs Protocol

The Orloffs Protocol

Pro Tools

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

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

1. 1

   Timing check for south-facing glass

   Check the sun position before starting south or west-facing windows. Midday direct sun on Bulgarian glazing makes cleaning significantly harder.

   Schedule south-facing windows for morning or late afternoon. North and east-facing windows can be done at any time.

   In summer heat, also check whether the PVC frame face is cool enough to clean - place a hand on the frame. If it is uncomfortably hot, wait or clean the shaded face first.

2. 2

   Pre-rinse

   Before applying cleaning solution, rinse the glass surface with clean water from a spray bottle or small applicator.

   Allow the rinse water to carry the loose mineral dust off the glass surface before the main clean.

   On heavily dusted glass, a second pre-rinse may be needed before applying cleaning solution.

3. 3

   Glass cleaning

   Apply solution with T-bar in full overlapping passes.

   Squeegee from top to bottom. Rubber wipe after each pass.

   Edge wipe in rebate before final pull.

4. 4

   Frame cleaning

   Apply pH-neutral cleaner to cloth. Wipe straight strokes.

   On hot PVC, work quickly and use minimal mechanical pressure.

   Rinse and dry immediately.

5. 5

   Drainage and cill clearance

   Clear all sash drainage slots with plastic tool.

   Clear the external cill junction of mineral deposits. These are harder and more adhered in south-eastern European conditions and may need a brief soak with water before brushing.

   Test drainage with a small amount of water.

6. 6

   Hardware service

   Apply lubricant to all mechanism points. Use a wide-temperature-range product.

   Operate full tilt-and-turn cycle to distribute lubricant.

   Dry any lubricant excess from the frame face - mineral dust in the air will adhere to wet lubricant on PVC.

Pro Tips

• ★ Timing is the most important variable in Bulgarian window cleaning. The same technique that produces perfect results at 8am on a south-facing window produces streaks and residue at 1pm on the same window.
• ★ Pre-rinsing is not a step that can be skipped in dusty south-eastern European conditions. The alternative is dragging mineral grit across the glass surface with every T-bar pass.
• ★ Hot PVC in Bulgarian summer is noticeably softer than cooled PVC in autumn. If you clean the south-facing elevation in September you will find the PVC frames much more forgiving than in July.
• ★ Twice-yearly hardware lubrication is a minimum standard in the Balkan climate, not a luxury. Lubricant applied in spring is significantly degraded by September in high-temperature conditions.
• ★ Apartment balcony doors in Bulgarian cities are the highest-use windows in any residential building. They are opened multiple times daily in all seasons and are the first hardware to deteriorate without service.
• ★ Mineral bloom on south-facing glass that has been left for more than 6 weeks in Bulgarian summer conditions may need a dedicated mineral stain remover rather than standard glass cleaner. Apply according to product instructions, rinse thoroughly, and complete with standard cleaning technique.
• ★ White PVC frames on south-facing Bulgarian elevations yellow faster than north-facing frames due to UV exposure. This differential yellowing is normal and accelerates if cleaning products with bleach or oxidising agents are ever used.

What NOT To Do

Bundle Kits and Tool Recommendations

Cleaning Frequency

Glass: 3 to 4x per year (South-facing elevations in Bulgarian climate benefit from quarterly cleaning to prevent mineral bloom bonding.). Frames: Same visit as glass (More frequent light cleaning is better for PVC in high-UV, high-temperature environments.). Drainage slots: Every clean (Standard maintenance.). Hardware lubrication: Twice per year (Spring and autumn. The Bulgarian temperature range degrades annual lubrication too fast for single-application service.)

Frequently Asked Questions

Field Notes

“South-eastern European PVC window cleaning requires timing awareness that is not part of standard northern European window cleaning training. The sun position and glass surface temperature are real variables, not theoretical ones. Primus Group windows represent the standard mid-range Bulgarian residential product. The material and construction are consistent with central European mid-range products - the climate context is what changes the maintenance approach. Twice-yearly hardware service is the most underperformed maintenance action on Bulgarian residential windows. The temperature range makes annual lubrication genuinely insufficient to protect the mechanism through the full year.”

Justin Orloff