Use of XL to Joint Pine clapboards

[landowner]

I have removed V-joint Tongue and grove pine (1"X6") from the house to replace rotted sections and sand and reinstall. I will be cutting out the rotted sections or damaged tongue sections with the TS55 on an MFT. Would it make sense to joint the sections together to create longer runs of pine and and reduce the number of joints showing on the wall or to extend a run to a stud. (I will be repainting so I think (hope) the joints would virtually disappear) Does this approach make sense? This would be my first use of the Domino 700,  Any recommendations on appropriate tenon size and glue to use for this outdoor application would be appreciated and I expect two tenons per joint would be required (I'm getting the plates and cutter adapter so I can use the smaller range of cutters on the 700)
Thanks for the guidance

 

[roblg3]

You're going to find out that you will need a spacer to hit the center of the 1x6.  Honestly i would just cut them shorter to land on the stud.  That would be some extra work. Unless you just want to play with the XL [unsure]
Titebond III is great for outdoors.

 

[MaineShop]

I would strongly recommend against this. It can depend on the climate where you live, and how long your horizontal runs are but putting a domino into end grain on exterior siding sounds like asking for trouble to me. Wood likes to move with moisture, especially pine, and if you restrict that you will only make pressure points that want to crack and check, It will not happen right away but properly installed wood siding with regular maintenance can last 100 years.

The best bet is to make sure all end cuts are sealed with a good primer to inhibit moisture absorption and to make sure all flashing is adequate. Also if you siding was put on by a professional it usually will have all joints meeting on a stud layout anyway.

This is only my opinion and I am sure others could make the case to try it out, and they may be right. In my area I rarely see v-match on the exterior of houses except maybe for the underside of a porch roof, so I could be way off. I am assuming that the boards are installed with a horizontal run as you called them clapboards but if they are vertical that could be another story.

Adam

 

[landowner]

Thanks for your comments. Yes they are horizontal boards. Your point about domino pressure on the end joints leading to cracking makes sense. I would be making things worse  jointing the boards this way. I'll take the advice about cutting to land on the studs and priming the ends to get the best result.
Thanks for taking the time to provide guidance folks.

Regards
Doug