Replacement windows

Horses for courses, as far as I can gather. Polycarbonate is stronger, so will keep waves out a little better. perspex (acrylic) is harder, so is likely to scratch - though far from scratch proof. For an average yacht, I'd use perspex, for a high latitude blue water job, where I'm expecting the 'oggin to throw big lumps of itself at me, I'd consider polycarb.
 
Stemar said:
Horses for courses, as far as I can gather. Polycarbonate is stronger, so will keep waves out a little better. perspex (acrylic) is harder, so is likely to scratch - though far from scratch proof. For an average yacht, I'd use perspex, for a high latitude blue water job, where I'm expecting the 'oggin to throw big lumps of itself at me, I'd consider polycarb.
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The vast majority of 'plastic' boat windows are acrylic. I assume you mean "perspex (acrylic) is harder, so is less likely to scratch"?
 
Is it possible to fit frame-less toughened glass windows? I'm having four made up at the moment and I will bond them to the f/g. (these days motor car windscreens are bonded to the metal chassis in a similar fashion). The surface of the boat would have to be flat as the glass can't, of course be bent.

Windows West are doing mine but surely businesses are providing a similar service in the UK

Where are you prv? prv know all about it as he advised me of the merits of the system just a week or so ago.y

http://www.windowswest.com.au/direct-glazed-windows.asp
 
Why can't you get curved glass? Car windscreens are all curved as far as I can tell. Surely this is quite a simple process to heat glass and bend it over a form. I was thinking about a solid spayhood rather than the normal bit of saggy plastic that you are supposed to be able to see through. For this the options are a rather angular affair such as some Halberg Rasseys have or, I thought potentially a curved bit of glass custom made. I am sure it would be expensive but surely not prohibitively so compared to some of the things on a yacht.

Quote from glass manufacturer (PSV Glass):
[h=3]Toughened Glass Manufacturing[/h]Toughened glass is produced by heating a sheet of ordinary annealed glass to softening point (approx 620-640°C) then rapidly air quenching it. It is the speed of quenching that determines the toughened quality.
The air quenching solidifies the outer layers whilst the inner core continues to contract. The outer layers are put under compression and the inner core is put under tension. This builds a degree of stress in the glass which increases its strength to four times that of annealed glass. This gives it excellent resistance qualities.
It is in the heating and softening process that the forming and shaping of the glass occurs, including sag bending on a mould or pattern.
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Looking online there seem to be so many variations of windscreens and side windows in cars, of various curves, that there is probably one sitting in a dump somewhere ready to install.
 
vyv_cox said:
I suspect that the cost of making a precise former to suit one yacht would be prohibitively expensive.
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I am not sure. I suspect it would be costly but having done a bit of research it seems that you can make your own moulds and there are a number of companies offering custom moulded glass. The difficult bit is finding ones that temper the glass also. I suspect that this would require a call to one of the manufacturers. It must be possible as it seems to be offered for architectural use and this glass needs to be tempered. It is amazing what deals you can get if you are nice to the people running a local factory. It will obviously be an order of magnitude more expensive than bog standard plastic but then it will not craze or look semi-opaque. I wonder if, for my boat design, I shouldn't try and see what is available in scrapyards as this is a really cheap way of getting tempered glass. Old aeroplane windows are also good and they have the 'double glazing' or, more acurately, secondary glazing.
 
pmagowan said:
Why can't you get curved glass? Car windscreens are all curved as far as I can tell. Surely this is quite a simple process to heat glass and bend it over a form.
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vyv_cox said:
I suspect that the cost of making a precise former to suit one yacht would be prohibitively expensive.
Click to expand...

It's definitely worth asking Compound curves are horribly expensive, but simple curves are straightforward and reasonably cheap - not much more than flat glass which is in turn not much more than perspex. I had a quote from C&J International for a new curved window for the front of my Hunter 490 ... it was pretty affordable, though I can't remember the amount. A hundred quid, maybe, including a frame?

My old Westerly had curved glass windows but when I took them out I discovered that the glass was made flat. All the curvature - about an inch over the 3' length - was sprung into the glass. Eek. Incidentally, the fact that the glass was dead flat after 25 years of forced curvature puts another nail in the coffin of the "glass is a supercooled liquid and flows" nonsense which goes around.
 
Apparently it is done all the time but I wonder about the cost


Replacement Boat Windows - PerspexPanels.co.uk
www.perspexpanels.co.uk/replacement-boat-windows.html
Typically these windows will be fixed or in frames and many are curved or formed. ... Typically tempered glass is used for front flat windows and is usually ...


Glass Manufacturers | Australia | Glasshape
glasshape.com.au/about/
Highly successful glass manufacturers in specialist glass products, for the Architectural, Transport, High Security and Super Yacht Industries. ... all types of applications including curved and toughened glass for balustrades, bay windows and ...

ALFAB Australia Auto Marine Glazing Solutions
www.alfab.com.au/
Complete Anodised windows, doors Black anodised, Marine toughened safety ... Curved Glass Windshields Alfab (Aust) Pty Ltd is proudly Australian made and ...

Marine Glass & Boat Windows (206) 538-5416
durashieldmarine.com/
We are manufacturers of custom marine glass, including marine windshields, port lights, yacht windows, curved glass, bent glass, laminated glass, and more!
 
Toughened glass windows - Yachting and Boating World
www.ybw.com › ... › Forum › Practical Boat Owner's Reader to Reader
Oct 2, 2006 - 23 posts - ‎13 authors
Glass in boat windows should be toughened and will be twice the .... I am not in UK but I believe that Pilkington do curved specials toughened ...
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http://www.ybw.com/forums/archive/index.php/t-101851.html
 
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