arlene matzkin Posted July 13, 2014 Report Share Posted July 13, 2014 I am the architect for an almost finished new house sided with Hardiplank clapboards. The first plank under each window is bowed out. All of the planks are blind nailed. Is there a way to remedy this other than putting in nails at the bottom of the bowed pieces? Is there an adhesive application. Has this happened to anyone else? Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted July 13, 2014 Report Share Posted July 13, 2014 Since it's blind nailed, there are no nails at the first course below each window and the planks are just doing what they do. Carefully drill and countersink holes in the bowed areas and gently screw the planks down with regular old deck screws. Patch over the screw heads with bondo if you like. I did this with my house 23 years ago and the Hardi is still doing fine in those areas. Lately, I've seen some builders address this problem with a pin gun. It seems to work fine as well and is a heck of a lot quicker. Quote Link to comment Share on other sites More sharing options...
jjeffzehnder Posted July 14, 2014 Report Share Posted July 14, 2014 This seems to be more of an issue when the plank is one piece across the entire window than when there is a joint somewhere under the middle of the window. Quote Link to comment Share on other sites More sharing options...
kurt Posted July 14, 2014 Report Share Posted July 14, 2014 I've done the same thing as Jim with finish screws. Not supposed to, but it works. Quote Link to comment Share on other sites More sharing options...
Chad Fabry Posted July 14, 2014 Report Share Posted July 14, 2014 I pre-drill and use 6 penny trim head stainless ring shank nails just under the sill. Quote Link to comment Share on other sites More sharing options...
mlparham Posted July 15, 2014 Report Share Posted July 15, 2014 This seems to be more of an issue when the plank is one piece across the entire window than when there is a joint somewhere under the middle of the window. I would agree with Jim that this repair will work. However, I recommend that you consult with the manufacturer before you proceed. Blind nailing combined with face nailing may void the warranty on the siding. The installation directions are very clear that both are not allowed. Quote Link to comment Share on other sites More sharing options...
mark parlee Posted August 17, 2014 Report Share Posted August 17, 2014 Face nail it under the windows. The only way the warranty is voided is if you go against warrantable application instructions, and that particular piece fails, than that particular piece will not be warranted. Quote Link to comment Share on other sites More sharing options...
Rob Amaral Posted August 18, 2014 Report Share Posted August 18, 2014 Did you leave a gap below the sill over the board?? Quote Link to comment Share on other sites More sharing options...
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