Due to its durability, a professionally installed slate roof can last about 100 years. However, it may reach a point where replacing the roof is essential. Generally, the lifespan of these roofs depends on the installation quality and the slate type. If it is an imported slate, it may not last beyond 80 years in UK weather. Poor installation or repair service may exacerbate the issue. Therefore, expert roofers in Stround advise on replacement when signs of damage become apparent.
Common Signs that Your Slate Roof Requires Replacement
Missing and Slipping Slates
Slipping of the slate is quite common. It is especially observed after storms. However, frequent movement is not a positive sign. It is often caused by the brittleness close to the nail holes and failed fixings. If the fixing system shows signs of weakness, repair work may become costly. Plus, it may make your roof unsafe.
Failing or Worn-Out Fixings and Nail Sickness
One of the most common causes of slate roof failure is nail sickness. It happens when steel or iron nails corrode due to ageing. Occasionally, the nail may begin to break. It may even pull the slate. A lack of support may cause the slate tile to shift out of place.
A large section of the roof may be affected by nail sickness. When it begins, it may not be visible from the ground. Falling or slipping tiles indicate a serious issue. During this time, it becomes essential to replace the slate roof tiles.
Crumbling and Brittleness in Slate Roof Tiles
Slate loses its natural oil over time, becoming brittle. It is a sign that the roof tile is nearing the end of its lifespan. When handling the material, it may crack. The material’s edges may delaminate and flake. On the surface, a powdery residue may become visible.
During this time, repairing the roof tiles may seem risky because they could break underfoot during service. Replaced tiles may not match the rest of the tiles. Plus, they may not be able to hold themselves and break away.
Persistent Leaking
If there is only one leak, it may be repairable. However, it can become a serious issue when you notice widespread leaks. It is possible to encounter slate deterioration, underlay failure, and failed flashing.
If the leak persists after the repair, it indicates the roofing system is no longer water-tight. Replacing the roof may be the only solution here.
Uneven and Sagging Roofline
A slate roof should have a straight, even roofline. When it starts to sag or dip near the ridge, there may be an underlying issue. On occasion, the roof rafters or battens may be failing. The roofing structure may have become sodden. The presence of previous inlays may have increased the weight, putting pressure on the supporting beam. Due to a structural issue, roof repair may no longer be an option.
Inspecting the roof, expert roofers in Stroud from RS Roofing & Building Services Ltd may be able to tell you whether you need a roof replacement service. However, you can also look for the signs above and contact the professionals.