On 26/09/2020 19:44, Peter wrote:
On Saturday, 26 September 2020 at 19:10:59 UTC+1, John Rumm wrote:
On 26/09/2020 18:11, Peter wrote:
Bay window has rot in the bottom of the 6 boards which form the
boxes. Going to cut away and piece in new timber lower 6-12" or so
each one. Could cut 90deg and put a couple of dowels in, or scarf to
increase the connecting end grain area. Or something else?
I quite like doing a scarf joint since you can then use screws into the
face to bring the joint together. You can use a two part resin filler in
the joint as well to form the glue and exclude any voids in the process,
and fill the screw head holes (if countersunk a little).

Thanks for the advice John. Scarf- at about 45deg? The boards are about 225 wide

That is usually adequate. A more acute from the end gives more contact
area, but is more difficult to cut by machine.

In some cases where there is space behind a board you can also
glue/screw in a section of bridging timber to give more mechanical
stability to the joint.


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/