Know the recommendations for your climate. Purchase insulation only after understanding the R-value needs of your area and abilities of the selected insulating materials. You should understand the concept of R-value. R-value refers to a material's ability to resist heat. Amount of insulation used is dependent on climate.
New vocabulary is vital to the passage being read.
These terms should be noted in the margin or glossary. Writing these new definitions down will help you remember them. The main idea is often found in the first sentence of the paragraph. The main idea tells what the paragraph will be about. Supporting details are found in subsequent sentences.