Roof Covering Defects

The perimeters are vulnerable even if the roof covering itself causes no problems.

Roof covering defects. Typically before 1890 nineteenth century roofs often contained narrow rafters. Check for any damaged missing and slipped slates. 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. Weak points can be created where services pass through the covering.

Build up of moss. 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. Defects in pitched roofs normally caused by 3 main factors. Poor designs found in pitched roofs inadequately sized members.

Damage as a result of making. Even small amounts of trapped moisture can result in your flat roof membrane detaching from the layer below and cause roof blisters. Some common causes of general roofing defects include. 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.

Flat roof defect 2 blistering. Damaged missing and slipped slates. Bubble like or long thin raised areas on the roof are called blisters. Many of the problems associated with felt coverings to flat roofs stem from poor workmanship.

Damage can be caused by workers operating in the area. 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. People go up with caulking and plastic roof cement and improper materials that are in no way intended for that purpose harriman says. Note or take photographs of.

Installing flat roof coverings be they felt asphalt or sheet metal is a specialised job. Diy felt jobs are the biggest culprit and are simply storing up problems for the future. Blisters are the most common roofing problem. One of the most common problems we see with metal roofs is improper repair.

Pitched roof coverings roof defects 1. Slate coverings to older roofs were secured with steel nails which are susceptible to corrosion known as nail rot or nail sickness. Slate roof defect photo library. 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.

Check for poor cement pointing and in particular for damaged or missing lead or cement flashings.