In actual fact, you may be pondering why we’re even posing this question whatsoever, provided just how thermally effective double glazing could be. Nicely, secondary glazing should still shock you. The level of conduction of heat is measured by a range termed a U-value. The U-worth is measured by 1/R https://environmentalimpact85058.ssnblog.com/35889506/fire-rated-secondary-glazing-fundamentals-explained