Make sure your routing table is clear of sawdust and other debris.
Make my own tongue and groove siding.
Carefully slice the back part of the groove of your replacement board but leave the front part of the groove attached.
Any rubbish under the wood can cause errors in your cuts.
Check to make sure the siding you choose has a successful track record in your region.
Depending on how the pieces fit together some jointed sidings can be fully attached by blind nailing through a tongue or underlap that will be covered by the course above.
Tongue and groove joints can easily be made with a router when using the right bits on a proper router table.
To begin making tongue and groove boards you first must decide to use either a table saw or a router.
Insert your new board s tongue into your old board s groove and lay the new board s front groove over the other old board s tongue.
You can use your circular saw set to the depth of just the back part of the groove.