Bought two models for our entrance bedrooms as we have been on a noisy principal road. Mounted them yesterday and the difference in noise is amazing. I went with the six.4mm laminated glass and positioned the models over the entrance in the window sill to give utmost hole. Clearview customer https://troyubgjo.designi1.com/48857390/top-latest-five-chelsea-secondary-glazing-solutions-urban-news