If the slope of your roof is greater than 6:12 you will need more ventilation to reflect the extra volume of attic space: Calculate 20 per cent more for 7:12 to 10:12 pitches, and 30 per cent more for a pitch that is 11:12 or greater. (Source: Asphalt Roofing and NRCA.) Then,...
Read the passage and fill in the blanks with proper words(在短文的空格内填入适当的单词): Water never stops moving. Snow and rain 1 to the earth from the sky. Water runs down 2 rivers and lakes, and sometimes it 3 waterfalls. Finally, the water 4 into th
We have a building with a 2/12 pitch. We are looking to replace this roof after 15 years. It was suppose to last 30 years. It started leaking 3 years ago. the shingle exposure is 4 inches. Can we decrease the exposure and get a longer life from the 3 tab shingles? I think we ...