One of the most common problems we see with metal roofs is improper repair.
Roof covering defects.
Note or take photographs of.
Slate coverings to older roofs were secured with steel nails which are susceptible to corrosion known as nail rot or nail sickness.
Poor design damp penetration and failure of the roof covering which we sometimes see in out house surveys in london.
Installing flat roof coverings be they felt asphalt or sheet metal is a specialised job.
Here we give photographs of slate roof conditions including normal wear on slate roofs worn out slate roofs types of slate roof wear and damage and stains or discoloration on slate roofs.
Slate roof defect photo library.
Many of the problems associated with felt coverings to flat roofs stem from poor workmanship.
This is the most common roofing problem and it tends to get worse during the day when the heat of the sun causes the trapped moisture to expand.
Diy felt jobs are the biggest culprit and are simply storing up problems for the future.
Using materials that are not intended for application on specific roof types can result in permanent damage to the roof.
Poor designs found in pitched roofs inadequately sized members.
Bubble like or long thin raised areas on the roof are called blisters.
Some common causes of general roofing defects include.
This slate roofing photo series shows all kinds of roofing slate defects.
Damaged missing and slipped slates.
Build up of moss.
Pitched roof coverings roof defects 1.
Damage as a result of making.
Check for poor cement pointing and in particular for damaged or missing lead or cement flashings.
Typically before 1890 nineteenth century roofs often contained narrow rafters.
Damage can be caused by workers operating in the area.
Blisters are the most common roofing problem.
The perimeters are vulnerable even if the roof covering itself causes no problems.
Defects in pitched roofs normally caused by 3 main factors.
Even small amounts of trapped moisture can result in your flat roof membrane detaching from the layer below and cause roof blisters.
People go up with caulking and plastic roof cement and improper materials that are in no way intended for that purpose harriman says.
Warm air rising from within a property reaches the underside of the roof covering cools and deposits moisture on the underside of the slates saturating the nail heads.
Example topics discussed in our building roofing articles include asphalt roof failures including thermal splitting and other defects causes and types of asphalt shingle roof leaks shingle blow offs and wind damage shingle cracks blisters stains thermal splitting and other damage fire retardant plywood roof sheathing defects.
They occur when a gas usually water vapor is trapped within the roofing system either between the plies or between the plies and the insulation.
