Tile Roof Underlayment Replacement

What This Service Involves

On most Washington tile roofs the tiles far outlast the waterproof membrane beneath them, so when leaks appear the fix is usually a new underlayment rather than a whole new roof. This lift-and-relay process removes the tiles in sequence, installs a modern high-temperature waterproofing layer, and resets the original tiles, saving the considerable cost of new material. It is exacting work, because tiles must be catalogued, protected from breakage, and returned to their proper headlap and pattern. We upgrade to a self-adhering, heat-resistant membrane engineered for the decades of moisture our climate delivers, along with fresh flashing at every vulnerable joint. The result is a watertight roof with the life expectancy essentially reset, at a fraction of full replacement cost.

Benefits

Reuses existing tiles to avoid the expense of new material; Restores full waterproofing with a modern high-temperature membrane; Extends total roof life by decades rather than years; Provides an opportunity to renew flashing and fix deck rot; Far more economical than a complete tile roof replacement

Our Process

1) Catalog and carefully lift the existing tiles, staging them for reuse; 2) Strip the failed underlayment and repair any rotted sheathing beneath; 3) Install a new self-adhering high-temperature waterproof membrane and fresh flashing; 4) Reset the original tiles to correct headlap and inspect the completed roof for watertightness

What Affects the Cost

Roof size and the total number of tiles to lift and reset; Percentage of tiles broken during removal that need replacing; Extent of deck or sheathing rot discovered underneath; Grade of replacement underlayment and new flashing specified; Roof complexity and safe-access considerations

Best Time of Year

Plan an underlayment relay for the dry summer window, since the deck is briefly exposed and must stay dry during the work.