HOW A TILED ROOF IS CONSTRUCTED TO FLORIDA BUILDING CODE
The roof structure is then covered with a thick waterproof sheet called the underlayment sheet, the underlayment sheet is made of fiberglass and asphalt and as long as it is sealed properly around pipe work and vents it will make the roof waterproof.
The Roof tiles are then added, Roof tiles in Florida are nearly always concrete overlapping and interlocking tiles which provide the maximum protection from water ingress under high winds. In the roof valleys where two pitches meet tiles are cut and butted up to each other this allows water to get in behind the tile and onto the underlayment sheet. Water that gets behind the roof tile travels down the underlayment sheet and exits from vent holes in the the eave closure strips (see diagram below).
CAUTION: Caustic roof cleaning chemicals including Chlorine and Sodium Hydroxide will rot tile roof fixtures and fittings leading to early and expensive repairs to your roof.
Roof Tiles are mechanically fixed to the roof board usually with a screw, they are perfectly safe to walk on but care should always be taken as there are many tripping hazards such as tile edges and vents to avoid. The screws that fix the tiles to the roof board go through the underlayment sheet, the screw threads tend to seal themselves as they go through the soft asphalt sheet.
The Capping Tiles or Ridge Tiles that finish the top of roof edges are also mechanically fixed to the roof board, the gaps between the capping tile and the roof tiles are then filled in with a cement mix usually matched to the color of the roof tile. This completes the roof construction.
Common Questions about Tiled Roof Cleaning
If you are interested in Green Roof Cleaning consider joining the Clean4Life™ QA™ Program,
Florida's 1st Green Certification Program for roof cleaning contractors.