This is a roof with metal shingles. There are snow guards along the south slope of the roof. The valley is open with the flashing designed to prevent cross-wash. The flashing around the penetrations appear to be properly installed to prevent moisture intrusion into the roof deck.
I looked at the picture of the “Metal Roof Clip”. This was mentioned as a fastener found on more expensive roofing systems. With its design, it appears to be a superior fastening device compared to the various standing and flat seams for fastening. With the integrated clip, the metal panel and the sealant, as long as it is properly installed, should prevent any leakage through the joints.
Roof debris which usually can be found in valleys where trees are present, is a no-brainer on a roof inspection. Debris can shorten the life span of asphalt shingles and actually provide a place for vegetation to grow if left in place. However, debris on metal roofs can provide negative effects as well, after this training, I will definitely be making that same comment for roofs with metal material as well.
After looking at some photos of metal roofing in the gallery, I found one that I was particularly interested in “fastener withdrawal”. This can be an issue in the roofing materials even if it cannot be viewed. The photo shows the fastener missing the supporting member underneath, yet the head of the fastener is flush with the metal surface. This situation can create wind lift issues depending on how many of the fasteners on that roof are in this condition. You can’t even see it! Another issue is with the use of improper fasteners that would be too short, yet were forced to make contact with the securing members below. This would improperly bend the roofing material and create “valleys” where moisture can settle and slowing corrode the material.
Metal can be formed into many different styles of roof covering. It can be made into panels or shingles. The shingles can be made to look like shakes or tile. These should not be walked on as they may be damaged.
This roof has several issues. There is significant rust which can over time lead to water penetration.The fasteners are over driven in several locations, which can also lead to water penetration. There is a sealant over some fasteners that will be a recurring maintenance. There appears to be a missing fastener head that is covered with sealent, but should be addressed by a roofing professional.
Placing the new metal roofing on the old composite roofing is an excellent way to save time, money, and effort. There is one issue in this endeavor though, you risk loose fasteners if there was any damage to the wood under the original roof due to WDO’s.
Lack of gutters could damage your whole roof in wetter areas. Misplacement of roofing on the edge of the roof may cause edge damage such as delamination and WDO’s as well. The remedy to these issues should be make sure the home has flashing and gutters installed.
The ridge vent helps ventilate the attic and helps keep moisture from building up. Without the ridge vent the attic would get really hot and also could affect the temperatures inside the house. If the attic got to hot then that could cause several issues like moisture and mold
This is a picture of the ridge cap having been blown off on a home in a high velocity wind zone. There was no other damage caused by the storm. The ridge cap was a clip on cap and when it blew off it exposed the fasteners underneith.
Since this is a metal roof course I found a picture of a metal fastner damage in the folder. I live near a high velocity wind zone and it is common to have winds 60mpr plus. I have seen fasteners get rusted and shear in half from wind loads.
My article is under metal roofing and “Batten With Clip”. This is a mechanically locking seam that is good and keeping out moisture while also securing the metal sheets together. These type of interlocking seams are used on lifetime roofing.
This is a picture of a metal roof that has been properly installed and flashed. The shingle roof was removed prior to installation over the roof sheathing and properly attached per the manufacturers instructions. This is considered a life time roof.
This plywood decking works as a substrate for metal roofing with a approved underlayment and fasteners the plywood acts as a Secure substrate for metal roofs therefore it is one of the preferred types of material to be used in this area
Metal roofing and Clay roofing can be difficult to spot but metal roofing does And in certain areas so that is the way you can distinguish metal roofing from clay tile roofing also if it is a copper metal roof it will have a green color to it and you can check to see how old it is by scratching on it and in certain areas so that is the way you can distinguish metal roofing from clay tile roofing also if it is a copper metal roof it will have a green color to it and you can check to see how old it is by scratching on it
While inspecting metal roofs the inspector should pay close attention to the fasteners if they exposed. Making sure that they are sealed and not leaking. If there is no fasteners exposed then you should look close to where the seems are and make sure water is not getting through.
This home that I inspected had metal structure roof made of aluminum that was painted from the manufactor the seams, flashing, gutters and fasteners appeared to be installed properly with no signs of any of the fasteners lifting of rusting
I learned in this course was how metal roofs can rust and shift if they are not installed properly. I also learned the metal shingles are hollow and can’t be walked and can be damaged in hail and wind storms
This is a re-due of this course for this inspector to make sure that we are still in the goods of our work & knowledge plus skills. i also have some pics of metal roofs from a neighbor that has a metal roof system on her home
These fastners were observed to have backed out or were not installed properly. The wood behind the screw may have developed water damaged that is hidden and not readily visible. A licensed roofing contractor should evaluate and repair as necessary.