Generally it is not necessary nor desirable to nail every single tile on roofs nailing as described here will provide a fully functional roof while allowing individual tiles to be remove later if necessary.
How to remove bottom row of roof tiles.
Once you have safely gotten to the broken tile you ll need to slightly lift the tiles that overlap the one to be removed.
Working with roof tiles is a lot easier when you know a couple of basic tricks.
You simply slightly lift the tile at the rear of the one you want to move and then lift the front and slide back the lower tile.
If your tiles aren t lifting they may have nails holding them in place.
As you roll out the underlay keep the bottom edge of the material aligned with the edge of the eave but above any metal or synthetic edging that may cover the borders of the eave.
Every tile of the 2 rows at the eaves both the half and full tiles those up verges and along the 2 rows at the ridge both the half.
Then use a brick trowel to lift up the broken over the baton underneath and slide it down and out.
Do this using two pieces of timber to hold them up.
This will lift the overlapping tiles on the row above so the tile you want to remove should come out easily.
If they are all nailed then its a bit harder.
Begin by lifting up the next door overlapping tile.
You may be able to prise the nail free by lifting the bottom edge then again it might snap the tile so have a spare handy.
How to replace a roof slate.
You may find that you need to go up a couple of rows to find an un nailed one then then work back down.
Position the first roll of underlayment at one side of the roof perpendicular to the lower edge the eave of the roof.
They are not hard to remove either the hardest part being lifting the first tile.
This will expose the nail on the tile on the bottom row.
Individual hanging slate removal sometimes a good tactic is to place a large 300mm 12 hacksaw blade in a hacksaw blade holder and cut through the two nails that hold the slate rather than use the slate rip and risk further damage.