You must be diagnosed with parathyroid disease (hyperparathyroidism) if your parathyroid hormone level is high and your calcium level is also high. The excess parathyroid hormone is the CAUSE of the high calcium. The high calcium is caused by a parathyroid tumor--nothing else will cause this.
The ridge of a sloped roof system is the horizontal top area where two sloped roof areas meet. The National Roofing Contractors Association defines ridge as Highest point on a roof, represented by a horizontal line where two roof areas intersect, running the length of the area.. The ridge area on sloped roof systems should be capped to ensure a watertight roof system as well as aesthetic appeal.
When thatched properly by professionals, the major portion of such a roof (the water reed) should last about 30 years in the Irish climate. However, the roof ridge will have to be replaced roughly every 8 - 10 years. Such ridge line replacement is, luckily, a fairly rapid and reasonably inexpensive procedure.