Replies

1. 
   jroy_ | Jan 25, 2002 06:18pm | #1

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   Check with the manufacturer on the max exposure, I know for 1/2 x 6 it is 4.5" (1" minimum overlap)...it all depends on what kind of look your going for.

1. 
   david_thodal | Jan 25, 2002 06:33pm | #2

   *Jeff, I have always tried to keep my lap to 1 to 1-1/2", with nailing thus 1 to 1-1/2" from the butt and at the top edge of the lower course. So if your 1/2 x 8" actually measures 7-1/4" butt to top edge, I would like to keep my exposure to about 6". This allows a nailing offset of 1-1/4" from the butt of the clapboard. If you start nailing much higher from the butt you increase the risk of the siding cupping.walk gooddavid

1. 
   jim_"crazy_legs"_blodg | Jan 25, 2002 06:48pm | #3

   *Here in Western Washington we face nail WRC bevel siding. I've installed plenty of it with as little as 3/4" lap. But our humidity swings, therefore seasonal movement, is probably less here than in other climates. There are pretty dramatic fluctuations in quality of material from mill to mill, too. Sometimes we get a brand that tapers to too fine an edge, and you have to use judgement, depending on the application and the materials - heck, I guess that's called "experience" and you have to acquire that yourself. But as a rule of thumb, 3/4" lap is plenty if you face nail (above the top of the course below it, allowing for seasonal movement).

1. 
   Jeff_Clarke_ | Jan 25, 2002 10:24pm | #4

   *Thanks to all - I appreciate it!Jeff