Heavy Rainfall
About 2,500 mm of rain falls each year near Grouse Mountain, most of it between October and March. Valleys, flashing and underlayment take the heaviest beating.
Snow at Elevation
The BC Building Code raises design snow load with elevation. A home in Upper Lonsdale or Seymour carries more than one by the water, and rain on snow adds more.
Shade and Moss
Tall cedars and firs shade many lots and drop needles into gutters and valleys. Shaded slopes stay wet longer, and moss works its way under the shingle edges.
Steep Access
On steep lots in Deep Cove or up the Seymour slopes, getting material onto the roof takes planning. Hoisting and staging add to the cost on these lots.
City or District
The Lonsdale corridor belongs to the City of North Vancouver. Lynn Valley, Deep Cove and Edgemont belong to the District. Each runs its own building department.







