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Ageing slate and flashing on Victorian terraces

The brick terraces near Doncaster town centre, Hyde Park and Balby often still have their original slate roofs, and while slate itself is a long-lasting material, the flashing, ridge pointing and roofing nails holding it in place have a shorter working life.

Nail sickness, where the fixings holding slates in place corrode and fail, is a genuine issue on roofs of this age, and it shows up as slates slipping or sliding even though the slate itself is perfectly sound.

Concrete tile roofs reaching the end of their life

Many of the post-war estates around Bentley, Wheatley, Cantley and Intake have concrete interlocking tile roofs now several decades old, and the felt underlay beneath those tiles has often perished well before the tiles show obvious surface wear.

This means a roof can look fine from the ground while the felt underneath is failing, which only becomes obvious once water starts tracking through during heavier weather.

• Perished felt underlay beneath tiles that still look sound
• Tiles that have become porous and start absorbing water after decades of weathering
• Ridge and verge mortar failing well before the main roof covering does

Guttering and fascia wear on estate housing

Original guttering and fascia boards on Doncaster's post-war estate housing are frequently reaching the end of their practical life, particularly where timber fascias have been left unpainted or unmaintained for years.

Replacing worn guttering and fascias before they fail completely avoids water tracking down the wall and causing damp at ground level, which is a common knock-on issue we see on this type of property.

Snagging on new-build developments

Newer developments around Lakeside and the Great Yorkshire Way corridor are generally well built, but as with any new estate, flashing details, verge finishes and guttering falls occasionally fall short of what they should be.

We're regularly asked for an independent opinion on this kind of issue, since it's not always straightforward for a homeowner to tell whether something is a builder's snag worth pursuing under warranty or an unrelated maintenance issue.

Damp linked to solid brick walls on older terraces

Many of Doncaster's older terraces were built with solid brick walls rather than a cavity, and ageing pointing on these walls can let moisture in at ground level in a way that's separate from, but sometimes confused with, a roofing leak.

Where a homeowner reports damp that doesn't seem to match up with an obvious roof fault, we're honest that a proper survey may be the right next step before committing to repair work in the wrong place.