Keeping Water out of the Top of Brick Walls
It sounds as if they did not do a good quality job of terminating the roof flashing material on the sides of the parapet walls.
It very well could have gone up higher than they installed it, although the specifications they provided may have met the "Minimum" height requirements.
An aluminum coping cap could be fabricated, but their is an art to installing an architectural sheet metal coping cap in place with proper cleats and splice plates and multiple possibilities of alternative installation methods.
The clay tile coping caps are an expensive option, but the flange that protrudes downward over the interior parapet walls will more than likely not come down far enough vertically to counter-flash the existing height of the current wall flashing materials.
Do you per chance have any digital photos that you could upload onto this forum for a better perspective of the situation and if possible, also lay out a tape measure vertically for a reference frame of view point?
Last edited by Ed the Roofer; 02-11-2008 at 09:53 PM.