First Example for a plain roof 150 M2 on a cost per annum basis.  [Slate cost only]

Roof                                                     Roof Cost                     Expected Life              Cost per Annum

New Penrhyn Blue Bangor slates            12,000 Euros                 300                   40.00

Best Quality Spanish Natural Slates        7,000 Euros                  100                   70.00

Poor Quality Natural slate                       5,000 Euros                     20                   250.00

Fibre-cement slates                               2,500 Euros                   30                     83.33

Clay Plain Tiles                                      5,500 Euros                   50                     110.00             

This proves that Blue Bangors are the lowest cost per annum, by a mile.

Second Example:-

We stripped an old roof in November 2001 and the Customer had the original Merchants receipt for the slates as follows:

Purchased from

Brooks Thomas & Co. Ltd, 4 Sackville Place, Dublin Telephone  3351.

Ref No F.C. 52                       Date 1st April 1914    Delivery :Free on rail Dublin

1320 pieces 24” x 12” Best Welsh Bangor slates                    14 : 17 : 0d

27 Plain Blue Ridge Tiles                                               9 : 0d

5. 24” Plain Chimney pots                                               8 : 9d

Total                                                             15 : 14 : 9d

The slates cost 2 old pence each  -- we paid him 2 pounds each

The ridges cost 4 old pence each -- we paid him 4 pounds each.

Calculate the cost per Annum taking into account that the slates had appreciated in value by 240 times their cost