The roof you see below is a slate roof replacement Arlington, VA that had reached the end of its service life. When slates start to turn brown or show white efflorescent half moons in their faces it is a sure sign that they have begun to deteriorate; over the past 5 years the owner had spent a few thousand dollars patching up areas where slates had fallen out or where flashings had begun to leak. When slates deteriorate they get soft and can drop out of their positions or just crack off entirely; its a long slow process when a slate roof starts giving up the ghost, keeping it on life support can get really expensive. I know what you’re thinking “I thought slate roofs last forever?”; nope, some slates from only a few quarries will last for more than 125 years, some slate veins in those same quarries can produce softer slate that is more prone to water absorption. [Read more…]
This was one of my favorite projects, the house is around 115 years old and is on the National Historic Register. Although beautiful on the inside; the exterior, specifically the roof, had been neglected. 90% of the roof is completely out of sight so it was easy for deterioration to get out of control. The client called with a small leak in the front part of the house.
Before: you can see the upper flat roof is covered in blisters and various peeling coatings. [Read more…]
This is a slate roof in Alexandria, VA. The homeowners had been having some sporadic leaking and hired a company to correct the problem. The solution they came up with was not carefully examining the slates for cracks or checking flashings for pits or holes; that would have been the right thing to do. [Read more…]