Z-speed rated tires. â¦tires were all Z-speed rated. They were tested at some speed above 149 mph. In order to be more precise, tire manufacturers started testing at 168 mph (W-speed rating) and 186 mph (Y-speed rating). In the above picture you'll see 91W to the right of the size. The W of the 91W means the above Yokohamaâ¦.
I get this question many times and it is my opinion that the old felt should be removed and not covered over. I donât know why some roofers say âleave it onâ. I seem to me if you are going to the trouble of removing the shingles, you now have a chance to do repair on the roof deck by removing all the old felt.
Wash the surface only of the felt item if it is only slightly dirty. Be sure the felt is completely dry and use a soft-bristled brush to brush away any debris. Slightly dampen a clean cloth with cool water and gently wipe the surface to clean it. 3. Wash the entire piece by hand if surface washing is not enough. Dry brush any loose dirt off of the felt. Fill the sink with cool water. Soak the felt item in the water for a few minutes, then gently squeeze the water out of it.