Are casing and corner boards mounted on top of horizontal weatherboard? Or fitted edge to edge?
Hi, I am building a wooden house and have primed 900 meters of fjällpanel which have now been installed by builders so that they run the entire length and meet at the corners. Corner boards will be mounted there later, and this is where my questions start.
Since it is a fjällpanel, gaps will form where each plank overlaps if the corner boards and trim are mounted on top.
Won't a lot of moisture and debris get in there and eventually cause damage?
Isn't it better to leave space for the corner boards so they fit edge to edge against the panel?
What is the case here?
Regards, John
Since it is a fjällpanel, gaps will form where each plank overlaps if the corner boards and trim are mounted on top.
Won't a lot of moisture and debris get in there and eventually cause damage?
Isn't it better to leave space for the corner boards so they fit edge to edge against the panel?
What is the case here?
Regards, John
If the corners are nicely aligned, no corner boards are needed. Traditionally, trim and corner boards have been nailed on top of the paneling. If you want it to be very elegant, you can use trim and corner boards made of thicker lumber that have a rabbet on one edge to conceal the transition to the Lapwood paneling. This lumber is then mounted in the plane of the paneling.
Hi, thanks for the response.
It's one of three houses that all have corner boards and trim, so there will be corner boards regardless, tongued boards, it will be quite a few tongues... But exciting, maybe easier with a circular saw on the mounted panel to fit in the corner boards. But back to the question, is it purely a design thing or is there a function to fitting trim and corner boards edge to edge to remove all gaps in the facade panel to reduce the risk of moisture or other damage from whatever might blow into the gaps? The house is exposed to weather from both deciduous trees and strong sea winds. Or does it not matter?
It's one of three houses that all have corner boards and trim, so there will be corner boards regardless, tongued boards, it will be quite a few tongues... But exciting, maybe easier with a circular saw on the mounted panel to fit in the corner boards. But back to the question, is it purely a design thing or is there a function to fitting trim and corner boards edge to edge to remove all gaps in the facade panel to reduce the risk of moisture or other damage from whatever might blow into the gaps? The house is exposed to weather from both deciduous trees and strong sea winds. Or does it not matter?
It's mostly a design thing, but excessive water intrusion should be avoided. The local climate is usually considered when choosing the type of panel. Overhanging eaves are also important in many places. Sometimes it's important to have mustäta facades, sometimes insect-proof. It's not an advantage in itself to be absolutely tight.
OK Thanks! Now I know! It seems logical for the panel to get some air and not be hermetically sealed. However, I think it looks a bit more professional with fitting. But if the function is the same and it's mostly about preference, I might have to argue quite hard for my builder to change their technique.J justusandersson said:
It is absolutely true that debris and moisture collect in the pockets created by external corner boards on horizontal siding. I am currently in the process of replacing siding that has been damaged for that reason. The corner boards and the ends of the siding have all suffered from rot damage.