The hub is half a moon shape where the end roof rafters fix to.
Roof lantern leaking.
Isolate areas when you run the hose.
Had an extension built last year with one of these on the roof.
In the victorian era metal framed roof lanterns became popular in building design and were used to highlight stairwells.
Boots the rubber seals that are around the electric service and plumbing vent pipes air vents and exhaust fan.
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A year has now passed and during the very heavy rain at the weekend a few drops came through from where the central ridge joins the supports.
Assuming that roof lanterns are fitted on flat roofs.
Start low soaking the area just above where the leak appears in the house.
If you don t have an attic or just can t find the source of the leak you can check several places for problems with moisture or damage.
Post renaissance roof lanterns were typically made from timber and glass and many structures were prone to leaking.
These normally have a foam bung stuck to the glass as they have a sticky backing.
Nothing serious but obviously a concern.
Remember the old saying.
They shouldn t be if the company installed the roof correctly.
For example soak the downhill side of a chimney first then each side then the top on both sides.
Ridge cap flashing gaskets around pipes.