Roof Shutters
Stephen Shepherd in the State of Deseret
>I am in the process of making shutters for roof slots in this observatory, base and meridian house, originally built in 1853. This is a reproduction of the building from original photographs.
The slots on the roof are opened to make celestial observations, transit of stars and planets across the meridian. I am constructing the shutters and am in a quandary as to what type of joint to use between the boards?
There are battens on the back and the iron strap hinges across the front on one and across the back of another. These hold the boards together.
I am considering Tongue and Groove, grooves and spline or half lapped rabbit joint. I will bead the edges to reduce warping and to give a drip edge (on the inside) to shed water.
Which joint would weather best?
Stephen