About us

We install a wide range of quality uPVC double glazing and triple glazing windows, composite and uPVC front doors, back doors and conservatories in the Portland, Weymouth and wider Dorset area. Our reputation has been built on solid workmanship and customer satisfaction.

When looking for double glazing windows, triple glazing windows, doors or conservatories choose Alpha Windows. Our quality cannot be beaten by our competitors as we work with the highest quality manufactures of window, doors and conservatories.

We can quickly replace broken or misty glass and fix broken handles and locks.

Alpha Windows are also Portland's approved PLANITHERM® window installer for double glazing and triple glazing.

Why not ask for a quote today? You will be surprised how competitive Alpha Windows can be while offering quality windows, doors and conservatories that meet, or in most cases exceed, the quality offered by large national window companies.