Answered 22nd jan 2016.
Removing roof tiles from inside.
If you do not have a scraper use a garden spade with a flat blade to hook the tiles underneath.
Continue tearing off the shingles and underlayment until you reach the roof jacks then start over at the top of the roof.
Keep your old roof tiles.
Push the shingles down to the roof jacks.
Remove shingles in a 2 to 3 ft wide section as you work down the roof.
Start on lowest row of shingles and work your way backwards to the upper part of the roof.
Continue spraying until you see runoff then let the chemicals sit for 15 20 minutes to soak in and begin attacking the mold.
Spray the entire roof thoroughly.
If you are removing any tiles from your roof it is a great idea to store them for use in the future.
Roof tiles can break easily and in most ca.
70 years is more than enough time for any roof especially if it has clay rosemary s on it and it sounds like they have blown.
This will prevent the solution from draining in your direction.
This maneuver will help to remove the piles together with nails.
That way you can be sure you have got an exact match if you need to replace a tile later on especially if your roof is a bit older.
Work your way through the top row of tiles weakening and pulling them.
Remove tiles from the roof ridge first.
I d tend to agree with agl above.
There is obviously no felt on the roof either so it looks like you are going to need a new roof.
The shingles will roll up like a ball in front of the fork.
Unfortunately roof tiles cannot be replaced from inside.
Working with roof tiles is a lot easier when you know a couple of basic tricks.
This video from bunnings shows you how to take a tile off and replace it prop.
Then use a brick trowel to lift up the broken over the baton underneath and slide it down and out.