Assuming they were fresh all along, it depends on what age they were when you bought them. I canât really give you a general guideline because how long they were sitting fresh at the store (and how they were handled before they got there) will likely change how long they can sit in your fridge.
Effects of roofing shingle color on energy efficiency. Tweet. The color of the shingles you choose for your build can have a significant impact on the buildingâs energy efficiency. The color shingles your clients choose can have significant effect on the temperature of the upper levels of the building. Attic temperatures can vary as much as 20 to 40 degrees F which in turn can reduce energy consumption by 20%.
A white (or at least light-colored) roof provides two benefits. The first is reduced air conditioning costs, which can drop 15 to 20 percent. The second benefit is more cosmic. A lighter-colored roof will reflect as much as 80 percent of the solar radiation that hits your house back into space. This increases the albedo (reflectivity) of the planet, which could help reduce global warming-surely a worthwhile goal for any home improvement project.