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A Guide To Brush Heads

October 16, 2019 5 min read

Water Fed brushes come in a number of shapes and sizes, and seem to be something that water fed Window Cleaners accumulate over time. Below are the most common brush types, and which situations might suit each. 

There are a few key variations that dictate how a brush will perform. These are split into the subheadings below: 



Which size brush suits best is really down to preference and the type of work it will be used for. A car showroom, typically with large panes of glass, might warrant a large brush, to cover the sheer volume of surface area needed, whereas domestic Window Cleaning or cleaning at height will require a smaller brush.

Choosing the wrong size of brush head can limit a Window Cleaners efficiency, and add unnecessary fatigue. Basic physics tells us that the weight of a brush head is more significant, the further it is away from the operator. 

Using a large and heavy brush might cover large surface areas, but in some scenarios might be detrimental. Conversely, there will be some scenarios where a large brush head is exactly the right option. 

The most common sizes of brush head for use on both domestic & commercial cleaning are between 9'' & 12'' (22-27cm). These generally strike a good balance between weight & surface area. In this size range, there are a variety of shapes & colour. Some example are linked below: 


14''-16'' (35cm-40cm) brushes are often considered specialty brushes. These are excellent for covering large areas of glass & can often be fitted with additional jets. Some examples are linked below


There is one larger brush in our range, at 24'' (60cm). This brush is specifically designed for Solar panels, but can also be used to clean windows and other large surfaces of glass. Take a look at this brush head below: 

Unger nLite Radius SOLAR Brush


Bristle Type

Brush heads generally consist of varying types of nylon, and occasionally animal hair (horse or boars) bristles. Becoming more popular is a combination of both.

However there are a few terms to be aware of, that will highlight some of the differences between bristle types. 


Our most popular brush heads right now feature DuPont® branded bristles. This particular type of nylon bristle is constantly increasing in popularity and comes with great reviews. 

DuPont® bristled brush heads are robust, offer brilliant cleaning power whilst retaining their shape. Some of our brush heads featuring DuPont® bristles can be found below:


Dual Trim

Dual trim brushes feature two types of bristle, this can either be the same bristle in varying lengths or two different bristle types. 

Many Window Cleaning brushes feature a longer length of bristle on the outside of the brush head, with an alternate material in the centre - or a shorter, stiffer variation of the same bristle in the middle. A large proportion of the WCW range of brush heads feature a dual trim. 


Flocked / Unflocked 

This refers directly to the bristles themselves, bristles are either categorised as flocked or unflocked (sometimes flagged/ unflagged). Flocked bristles are split at the ends to create smaller filaments.This gives the brush a softer feel, and a microfibre like cleaning effect. This softer bristle makes it perfect for cleaning surfaces that are a little more fragile, such as leaded windows or solar panels. 

Most Window Cleaning brushes are unflocked, generally they provide a deeper clean with less pressure, and hold less dirt. A few of our Flocked brush heads can be found below:


Stiff Bristle

Stiff bristle brushes offer exactly what you might expect. These include a short, rigid nylon bristle and are brilliant for cleaning stubborn dirt. Currently we only stock a single Stiff bristle brush, take a look at that here: 

Vikan 9.5'' Stiff Bristle Hi-Lo Brush


Brush Shape

Brush heads used for Window Cleaning generally fall into two categories, these are rectangular and sill brush heads. Rectangular brush heads are the classic shape of brush head, this shape lends itself to Window Cleaning, and allows brush heads to remain lightweight. Take a look at our most popular rectangular brush heads:


Sill brush heads, also known as Hi-Lo or Radius brush heads, are angled so that the bristles splay in two directions. In doing so it allows the operator to clean frames, sills & crevices with ease, covering the sill of the window as you clean the bottom of the frame. Some Sill brushes angle in a number of directions, making them even more versatile. Take a look at our most popular Sill brush heads: 

Brush Considerations

Delivery Jets

All brushes come as standard with Pencil or Fan Jets (chosen when ordering online), these refer to the way the water is delivered to the windows. 

Pencil jets deliver water directly to the window, whereas fan jets spread the water over a greater area, in a mist like effect. Both jets have benefits, depending on their application.  

Rinse bars are a slightly newer development, but offer brilliant functionality. They may be used alone as a rinse system or in conjunction with pencil or fan jets. The rinse bar delivers water through multiple narrow jets, giving a wide coverage. 


Shop The FaceLift Rinse Bar

Important Terminology

Glass is generally classified in two ways, understanding each can help you choose the perfect delivery jets. 

Hydrophilic Glass: Hydrophilic surfaces hold water. How this translates to Window Cleaning is that water will hold on the window and 'sheet' over the glass allowing the rinse to quickly clear all the dirt from the glass. This type of glass is more common, particularly for domestic cleaning. 

Hydrophilic glass can be quickly cleaned with any preferred delivery jet. 


Hydrophobic Glass:Hydrophobic surfaces repel water. How this translates to Window Cleaning is that water will bead and clear quickly from the window. This makes it difficult to rinse the whole window as the water does not create the distinct sheeting effect and so some spots can be easily missed. This type of glass is sometimes found in a commercial cleaning enviroment. 

Hydrophobic glass can be quickly cleaned by fan jets or rinse bar. 

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