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.

• It's what's inside that counts
• Durable performance that lasts up to five times longer than single-seal units
• Make chilly rooms and condensation a thing of the past
• Technical specifications