I believe with the right mixture of bristles configured on a constructor brush it will loosen stubborn dirt as easy if not easier than a normal brush but that is not the reason why I use the constructor brush. I use cold and warm water. For anyone that uses hot water they would probably be best using an industrial version of the constructor bush as it has much stiffer bristles. The main reason I use the constructor brush is because I've always rinsed on glass and with the constructor brush there is a row of bristles with twenty eight very tiny jets on a rinse bar above the bristles and two jets on the left and two jets on the right of the brush to aid cleaning right in the corners. It gives a uniformed sheet of water just above the bristles to allow a curtain of water to sheet just above the brush which is ideal for rinsing straight down vertically in fewer passes without leaving little bits of dirt left behind owing to the volume of water running straight down after the bristles so no need to lift off the glass to rinse because even when the brush is on the glass rinsing it's still scrubbing on the way down the glass. The only way to find out if the brush is for you is to borrow one to try or buy one. Unless you try, you don't know.
I bought a Tucker brush with an overhead style rinse bar back in 2003. I lost a few customers simply because the overhead spray wasn't controllable as the two jets sprayed water too high above the glass and the frames when trying to clean the glass. Back then other window cleaners thought I was barmy using water fed poles whilst they worked traditionally. I done away with the over spray facility on the Tucker pole and customers liked their clean windows and noticed how long their windows stayed cleaner for longer which became a USP for water fed pole cleaning, the rest is history. Overhead spray bars are good in principal but rubbish in reality as they spray water too vaguely where you really don't want a water spray hitting, i.e. on the lintels and over the top of window frames whilst you are just trying to clean the glass. The idea of buying another brush with over head rinse put me off owing to my history using a Tucker pole but after closer scrutiny I realised with the constructor brush how much more uniformed and closer the jets are to the top row of bristles and could see the potential and benefits of using it. I took a chance and bought one about a year ago. Now I have four of them all slightly different and use them as much as possible as I prefer working with these brushes compared to normal brushes. The only downside to these brushes is the extra weight but I can live with that for normal work up to thirty-ish feet working.
For anyone tempted to buy a constructor brush but too afraid to splash out over hundred pound on 'just' a brush, yes it's way expensive then I suggest buying a bissell bar and fitting it to your normal brushes and see how you get on with it. You do need the one with every hole not every other hole as there are two versions. They only cost £1.50 and about 5-7 quid with postage. I use them on my normal brushes with work over conservatories and above thirty feet, I like them, they are really good. Search Jack brushes as there are a couple videos on you tube to get a rough idea
