Double glazing lasts for around 20 years but does differ according to the top quality of your window models and the caliber of the set up. Very happy and I am about to order further secondary double glazing and a few polycarb replacements for your greenhouse. Secondary glazing is a https://custom-tile-design-in-lon58023.wssblogs.com/29495919/indicators-on-vibration-dampening-you-should-know