wood siding, not lapped?

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Author Message anon (Unregistered Guest) Unregistered guest Posted on Sunday, August 17, 2014 - 06:31 pm:    this looks great in an architectural magazine but will it just rot in a few years, how does it drain? doesn't wood siding have to be lapped? http://2.bp.blogspot.com/_zqFoq3qej2c/TBbsilcvgmI/AAAAAAABY70/6gnLmJXXFag/s1600/Picture-22.jpg anon (Unregistered Guest) Unregistered guest Posted on Sunday, August 17, 2014 - 07:36 pm:    reading further I see the article says "The exterior is clad in a combination of cinnamon-colored mangaris wood (a sustainably harvested Brazilian hardwood), smooth-troweled stucco and cement board painted brown." so perhaps this element is the cement board painted brown? (fiber cement siding with wood texture and painted brown?) but still even fiber cement siding has laps, using the rainscreen principle to drain and not trap moisture, in all those horizontal joints exposed to the elements. what specification section would you suggest to an architect who is thinking of doing something like this? (if that is even what they are thinking. I'm in the interrogation phase still here!) All I know is they thought a spec is needed for 064400 "ornamental woodwork" with exterior wood as the only item in that section. Searching the drawings, the only thing that remotely matches that description is noted as a "wood clad shear wall" on the elevations and looks like wood flooring turned on it's side, so I did an image search looking for how someone could make that work. That's how I arrived at the photo in my first post. Here is another view: 2.bp.blogspot.com/_zqFoq3qej2c/TBbszUygQoI/AAAAAAABY8E/RvNkUjgjWgE/s1600/SunsetPlaza003.jpg). If you want to see the whole article, it is amazing architectural eye candy, but there are so many adds you might want a script blocker: http://ifitshipitshere.blogspot.com/2010/06/sustainable-spectacular-home-in-hills.html for the project I'm specifying, it is not a primary cladding for the building, instead it is cladding to wrap around a major supporting element that I see now on the axonometric is holding up the whole end of the building (it is a 10-story hotel), recessed under the porte cochere. The wood cladding is also a backdrop to the illuminated hotel chain sign. So it receives some protection from the elements but it is all exterior. I'm thinking of suggesting 076400 and use fiber cement siding wood-textured and factory primed all sides and painted, but also please let's use horizontal lapping, unless they want to use real wood siding, and still lap it - does this make sense? I've never seen wood flooring on its side on the exterior of a building, for good reason, except perhaps here in these Hollywood pics and I wonder how that will work out in 10-20 years. ken hercenberg Senior Member Username: khercenberg Post Number: 816 Registered: 12-2006 Posted on Monday, August 18, 2014 - 10:12 am:    It may be something like this - http://www.geolaminc.com/cms/ Dave Metzger Senior Member Username: davemetzger Post Number: 525 Registered: 07-2001 Posted on Monday, August 18, 2014 - 10:41 am:    It's not necessarily horizontal joints exposed to the elements. Could be beveled tongue-and-groove joints. As long as the groove faces down and the tongue up, should be OK. Not ideal, but OK. Steve Taylor (Unregistered Guest) Unregistered guest Posted on Monday, August 18, 2014 - 07:02 pm:    I think Dave probably has it. Either t&g with a beveled quirk on the face side, or a half lap, also with a beveled quirk. The advantage to the t&g is that you don't need any face nails except on the bottom most board. Steven Bruneel, AIA, CSI-CDT, LEED-AP, EDAC Senior Member Username: redseca2 Post Number: 452 Registered: 12-2006 Posted on Monday, August 18, 2014 - 08:21 pm:    You see a lot of square edged tongue and groove siding on old San Francisco victorians and other early wood frame residential buildings. It seems to have been used to create exterior smooth wall surfaces at a time when wood was cheaper than exterior lath and plaster, and perhaps something simpler from a carpenter's perspective. You often see it used in combination with more heavily modeled tongue and groove profiles to create surface texture variations and hierarchies. The lower level of a building would have a large scale T&G simialr to a "rustic" base in classical architecture, with smaller scale T&G on the upper floors. Square edge used as a background for applied decorations where joints would conflict, on exterior soffits, and often in service side yards and lightwells.