The attached photo shows a clay tile roof valley. The valley has a metal flashing installed beneath the clay tiles. This valley flashing will carry water down the valley and off the roof. Since the tiles are cut back from the center of this flashing the water can move quickly with less resistance.
In the gallery image labeled concrete tiles four types of concrete tiles are shown.Two types of flat tiles shown are interlocking and shingle. The others are spanish and curved. One similarity is that each tile has two nailing holes at the top. During installation the course above will cover these nails.
The amount of water absorption into clay roofing tiles depends on the extent of clay vitrification, in turn an effect of how the clay tiles were fired or produced. Soft low-vitrification clay tiles such as those shown at above left (Mexico) are more likely to absorb water and would not perform well in freezing climates.
More often we see dark stains on these clay tile roofs, typically an algae formation. Generally low-vitrified soft clay tile roofs fail due to the fragility of the roofing tiles themselves, and not from water absorption or mineral salt formation.
The is a picture of the valley flashing along with its continuance behind the chimney. The debris and neglect as well as age of this roof has caused it to fail in this area. There are holes in the flashing and leaks that need immediate attention by a licensed contractor.
Tile to wall flashing (pic from the gallery): This type of installation uses a pan flashing under the counter flashing so that water will not run back under the clay tile. Other roofing systems use a counter and step flashing. This is important to note before you install clay tile because using just regular step flashing will cause leaks.
I read the article “Mastering Roof Inspections: Tile Roofs, Part 1” by Kenton Shepard and Nick Gromicko. I learned that medium and high profile tiles should have a birdstop installed along the eave that will help keep birds, insects and wind from entering the space under the tile. The stop could be provided by the manufacturer, made on site or filled with mortar.
In this picture is a clay tile roof that has been neglected and is now in need of replacement. The tiles have not been kept clean and there is a buildup of debris and living organisms. The debris holds moisture and deteriorates thee tiles along with the growth of moss, algae and lichens.
This roof is covered using a clay roofing tile. The ridge cap of this roof was sealed with mortar. The mortar appears to be in good condition and is adequately holding the tiles in place. I see no signs of water intrusion on this roof.
Toilet Inspections:
When inspecting a bathroom in a home be sure to inspect the toilet. Look for any cracks in the bowl or tank, check the water supply connections for any leaks. If the home has not been winterized and has water running to be sure to flush the toilet to ensure it works properly.
this cement roof tile has experienced some damage to the lower right corner of the locking portion of the tile. the missing piece is exposing a small hole to which moisture can enter I recommend having a roofing expert asses the proper course of action.
ozone generators can be useful in aiding in odor removal in a space . the generators should not be used in an occupied space as it is harmful to breathe excessive amounts and is even harmful to plants for a similar reason.
The residence in this photo has flat concrete roof tile as the finish roof material. The starter strips are perforated copper to allow for water drainage. The manufacturers guidelines call for a stainless steel fastener in each tile of the first course and every third tile every fifth course. All of the roof tiles are set with expanding foam.
Concrete and clay roof tiles are to be handled carefully during transport, stocking on the roof and installation.Rough handling can cause breakage or stress that will lessen the tiles ability to shed water properly. The tiles life span may be compromised as well.
After reading about bathroom ventilation I was assured that referring to anything as mold is not advised, especially without a lab test. The bathroom vents need to terminate outside with the least amount of turns, if any. If there is any mold like material only refer to it mold like or conditions are present for bacterial growth.
This clay roof was recently installed. There are no signs of chipped or broken tiles. The pattern in which the tiles were set in place seems as if they correctly placed. I see no signs of growth present on the tiles. The tiles are not covered by shade.
The ridge caps on older tile roofs may depend on just mortar to attach to roof structure. This one has lost its bond to the mortar. A roofer is able to repair this with a roof tile adhesive . New tile roofs have a ridge “board” which the tiles are mechanically attached to.
Roofing may come in many different types. Asphalt / fiberglass shingles are the most common in residential construction . They are made of a fiberglass matting saturated with asphalt and covered with a colored granule . They can generally last 20 to 30 years.
This is a picture of a cinder block shed built on a concrete slab with a shingle roof. The roof sheathing is 1/2" plywood, the shingles are a 3 tab architectural shingle, and the flashings include only a drip edge on the eave as there are no through roof penetrations.
Tile roofs can be characterized in three categories, low profile or flat, medium profile may be clay pan tiles or s shaped tiles, and high profile tiles which are typically barrel tiles. Some tiles roofs have interlocking tiles and some have overlapping tiles.
