Glazing - What Differences Are There?
OK, now there are many Glazing options available in the manufacturing of Glass, but lets take the most widely used options used for Flat Glass.
Firstly, Double Glazed and Triple Glazed. Now typically, going with Triple Glazed over a Double Glazed option will give you better Insulation (Keeping the heat in) and better Sound Insulation. But is it as good as it sounds? A lot of people will be side tracked as soon as they see the words 'Triple Glazed' but you want to be comparing the Glass spec itself. For example not all Double and Triple Glazing is the same in terms of Glass Pane Thickness
and Cavity Thickness
. You may be looking at two rooflights, both Triple Glazed, but they may have two very different specs, lets take an example;
Triple Glazed Rooflight 1 - 6mm Outer Pane / 16mm Spacer / 6mm Center Pane / 16mm Spacer / 6mm Inner Pane
Overall = 50mm
Triple Glazed Rooflight 2 - 6mm Outer Pane / 12mm Spacer / 4mm Center Pane / 12mm Spacer / 4mm Inner Pane
Overall = 38mm
Now both of these Rooflights will boast Triple Glazing, but clearly there is a difference in terms of Performance. And this goes for when comparing Double Glazed with
Triple Glazed, as a good spec Double Glazed Skylight can often perform as well as that of a low spec Triple Glazed.
So check the Glass Spec! You will want Toughened Glass, ideally at least 6mm (Sometimes 4mm will suffice on a smaller window) Anything over 2m2 and you should be seeing glass panes increase accordingly, if they dont, be wary! Bowing and sagging of Glass is very common on large units and a good manufacturer will know exactly when to increase Glass thickness or install a glazing bar for support.
Laminated Inner panes are there for Safety! In the event that something breaks the glass, it's to stop everything falling through. Laminated Panes also adds to cost, so if you are weighing up the cost of units and one has the laminated inner pane, bear in mind that the extra cost is for safety! Currently all of our Flat Glass Skylights offfer Laminated Inner Panes as standard.Shop Laminated Glass Rooflights