Europe · Window Manufacturer

CMS Window Systems

🇬🇧 United Kingdom · Last reviewed by Justin Orloff

Cms Window Systems window systems

Quick Facts

founded

2006

Scotland, UK

primaryMaterials

uPVC profiles, energy-efficient specification

glazingPartner

Supply and install - glazing included

marketTier

Mid-Range

Brand at a Glance

Country: Scotland, UK
Founded: 2006
Market: Scottish social housing, private residential new-build
Focus: Energy efficiency in Scottish climate conditions
Climate context: Scotland - highest UK rainfall, frost cycles, Atlantic damp, coastal salt air

Product Range

uPVC casement windows
uPVC tilt-and-turn windows
Residential entrance doors

Why This System

CMS Windows' energy-efficient specification means their products are sealed more thoroughly than basic uPVC - the glazing unit specification and seal quality is higher to meet Scottish Building Standards. For cleaners, this means the drainage design is particularly important to maintain. Scottish climate means faster mould growth in rebate grooves and on frame faces than in England. North-facing CMS Windows installations in Scotland can develop mould growth within weeks in winter. CMS Window Systems operates as a supply-and-install company - the installer is also the manufacturer. This means the installation quality is consistent with the product quality, and drainage slot positioning follows CMS's own specification rather than a fabricator's variation.

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 CMS Window Systems 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 CMS Window Systems systems.

Pro Tools

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

1Pure water fed pole

2Microfibre T-bar applicator

3Professional squeegee

4White vinegar solution in spray bottle

5Soft drainage brush

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

Pro Tips

In Scottish winter, schedule CMS Windows cleans for 10am to 2pm when temperatures are highest - morning frost on the frames and glass makes pre-dawn or early-morning cleaning ineffective and potentially damaging to seals
Always carry white vinegar solution when working Scottish residential - mould on north-facing frames is routine and needs treatment at every visit
On CMS Windows in coastal Scottish locations, pre-rinse with a full pure water pole pass before any contact cleaning - salt crystallisation on the cold frame surface is abrasive if dragged across during the cleaning step

What NOT To Do

Do not use bleach or chlorine cleaners on any CMS Windows uPVC surface - mould must be treated with vinegar not bleach
Do not clean in freezing conditions - solution freezes in drainage slots and seals
Do not use abrasive pads on any frame surface
Do not skip drainage slot clearing at any visit - Scottish rainfall frequency makes this the highest priority maintenance point
Do not use solvent-based cleaners on rubber seals

Bundle Kits and Tool Recommendations

Bundle Kit

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 →

Tool Recommendations

pH-neutral glass cleaner

View on Amazon [coming soon]

pH-neutral uPVC frame cleaner

View on Amazon [coming soon]

White vinegar solution for mould treatment on frames

View on Amazon [coming soon]

Cleaning Frequency

Clean every 4–8 weeks depending on environment.

Frequently Asked Questions

How often should I clean CMS Window Systems windows?

For CMS Window Systems windows, we recommend cleaning twice a year depending on your local environment. Coastal or urban locations may need more frequent cleaning.

What tools do I need for CMS Window Systems windows?

Professional cleaning of CMS Window Systems windows requires my daily tool list of: Pure water fed pole, Microfibre T-bar applicator, Professional squeegee, White vinegar solution in spray bottle, Soft drainage brush.

What should I avoid on CMS Window Systems windows?

Do not use bleach or chlorine cleaners on any CMS Windows uPVC surface - mould must be treated with vinegar not bleach

Does CMS Window Systems publish an official cleaning guide?

CMS Window Systems 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 CMS Window Systems windows?

Yes, purified water via a water-fed pole is one of the safest methods for CMS Window Systems glass. Ensure TDS is at or near zero before use and avoid directing high-pressure water at seals or gaskets.

Field Notes

“CMS Windows in Scottish social housing blocks face a maintenance challenge common to all Scottish residential - high rainfall, low cleaning frequency in some contracts, and fast mould growth. The first professional clean on a neglected Scottish social housing property requires significantly more time than a maintained property. In rural Scotland with peat-influenced water supply, the mains water used for rinsing may contain peat staining. Pure water fed pole systems using deionised or reverse osmosis water give a cleaner result than mains water rinsing in peat areas. Scottish coastal properties with CMS Windows face salt air loading year-round. Pre-rinse with pure water at every visit - salt crystallisation on cold uPVC frames in Scottish winters is more aggressive than on warmed summer surfaces.”

Justin Orloff

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