Thomson Slate Roofing

Specializing in Slate Roofing, Copper Gutters, Flashing, Exterior Restoration, (410) 889-7391, MHIC 18421

No Headlap

The title should really be "Lack of Adequate Headlap," because it is a common problem with newly installed slate roofs. Headlap; what is it and why do I want more of it?

Headlap, or the relationship of overlap of one slate to the 2nd slate above it. Headlap is one of the most important technical aspects of slate roofing.


Read more: No Headlap

Valley Problems

Valley Problems

  • Pinholes in the metal
  • Broken slates in the valley 
  • Slip Valleys
  • Debris Build-up in the valley creating a dam.

Picture of a valley

Buy Maryland

Buy Maryland Flag