Double Glazing

The Inside Guide To Superior Double Glazing

To create a better window, we looked inside...

Small things make a big difference.

So where other double glazing manufacturers use a rigid metal spacer to keep the glass panes apart, National Glass uses a unique Thermoset Spacer. It’s made of durable polymer that holds its shape and gives exceptional thermal performance, keeping you cool in summer and snugly warm in winter. You’ll notice the comfort – and appreciate the lower energy bills. Take a closer look at all the benefits you’ll enjoy with National Glass. We think you’ll agree that strength, beauty and durability come from within.

National Glass Branches

Durable Performance That Lasts Up To Five Times Longer Than Single-Seal Units

Double Glazing For Life

Thermoset Spacer meets the challenge of the P-1 chamber, the test many engineers rate as the world’s toughest. One week spent in a P-1 chamber is the same as one year in the field. Thermoset Spacer survives 100 weeks, so you can work out the implications for yourself.

When choosing a double glazing system, make sure you specify the one that doesn’t give up when the going gets tough.

National Glass Double Glazing Reverse Dual Seal

Our Dual Seal Design Gives You The Edge

Thermoset Spacer’s outstanding durability is partly due to its edge seal design. Its structural seal is on the inside – pre-applied to the spacer itself. This takes the form of a pressure-sensitive acrylic adhesive backed up by hot-melt butyl . This gives you two lines of defence against gas and moisture, with the durability to keep on working for years to come.

If you’re not so interested in the technical details, all you have to remember is that double glazing is only as good as its seal. Keeping out moisture and cold air is what our system is designed to do. And it does that very well indeed.

National Glass Double Glazing Reverse Dual Seal

The Seal Of Approval From Around The World

Our Thermoset Spacer technology meets New Zealand standard BS5713 and EN1279 so you can rest assured it’s passed the test for local use. But that’s just a small part of the picture. Building authorities around the world have certified Thermoset Spacer for performance in a huge range of climates. From Norway, Canada and the USA to Germany, Spain and China – our Thermoset Spacer system has the seal of approval.

Contact National Glass to discuss your Double Glazing needs.