If your window is broken, security is a big concern. You also don’t want a quick fix that’s unsightly or energy inefficient. Nor do you want materials that won’t last a long time. At 1st Double Glazing Doctor, we offer fast, affordable glass replacement and repair services. We use quality double glazed glass sealed unit which come with a 5 Year guarantee. With 20 years of experience in the business, you can count on us for professional, honest service and a franchise seal of quality.