Old Ironmaker Posted March 9, 2015 Report Share Posted March 9, 2015 Parnelli does the name Luker ring a bell. Or Larry Smith? Link to comment Share on other sites More sharing options...
Parnelly Posted March 9, 2015 Report Share Posted March 9, 2015 Parnelli, an excellent explanation in layman's terms. And I always thought the drywallers were speaking gibberish. Not really, just another language amongst themselves. I'm struggling with the difference laying down or standing up a sheet makes a difference to how air movement and thus fire migration is effected. I'm a bit of a slow learner, but I'll have an eureka moment soon. Excellent. Thanks. Not the best pictures but these may help. The first picture shows a fire rated system. The second, is a typical installation, for housing, or non rated walls. Parnelli does the name Luker ring a bell. Or Larry Smith? No not familiar with either names. Link to comment Share on other sites More sharing options...
wormdunker Posted March 10, 2015 Author Report Share Posted March 10, 2015 Parnelly - In your second sketch how do I mud the vertical butt joint? Is the edge of those two 4' adjoining sheets square? Unlike the 8' horizontal edge has a factory taper for mud coverage. Link to comment Share on other sites More sharing options...
Parnelly Posted March 10, 2015 Report Share Posted March 10, 2015 Butt ends of the sheets "should" be square. When making a butt joint, its best to only use factory ends. Mudding a butt, requires it to be feathered out significantly more than a standard beveled edge. Try to keep the butt joints as tight as possible. Link to comment Share on other sites More sharing options...
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