NO YOU NEED TO GET SPECIAL VENTS DESIGNED SPECIFICALLY FOR YOUR ROOF TILE THEY COST APPROX £25-£30 EACH TO BUY AND £15 EACH TO FIT.
YOU NEED TO GET THEM FITTED TO THE BOTTOM OF ROOF AND TOP TO ALLOW THE AIR TO CIRCULATE.
HOPE THIS HELPS YOU.
Davie. (roofer)
ps you might also check your central heating tank is not boiling in the attic,its the small tank.
David Cummings.
February 2010