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Gutters prevent water ingress into the fabric of the building by channelling the rainwater away from the exterior of the walls and their foundations. [9] Water running down the walls causes dampness in the affected rooms and provides a favourable environment for growth of mould, and wet rot in timber. [citation needed] A rain gutter may be a:
Reglet detail. A reglet is found on the exterior of a building along a masonry wall, chimney or parapet that meets the roof. It is a groove cut within a mortar joint that receives counter-flashing meant to cover surface flashing used to deflect water infiltration. Reglet can also refer to the counter-flashing itself when it is applied on the ...
The crenellated parapet on a bastion of Kyrenia Castle, Cyprus. A parapet is a barrier that is an upward extension of a wall at the edge of a roof, [1] terrace, balcony, walkway or other structure. The word comes ultimately from the Italian parapetto (parare 'to cover/defend' and petto 'chest/breast').
A parapet (i.e., a defensive low wall between chest-height and head-height), in which rectangular gaps or indentations occur at intervals to allow for the discharge of arrows or other missiles. Bays The internal compartments of a building, each divided from the other by subtle means such as the boundaries implied by divisions marked in the side ...
Larger curtain walls were provided with mural passages or galleries built into the thickness of the walls and provided with arrowslits. If an enemy reached the foot of the wall, they became difficult to see or shoot at directly, so some walls were fitted with a projecting wooden platform called a hoarding or brattice.
Once underlying roof decking is soaked, it often sags, creating more room for water to accumulate and further worsening the problem. Another common reason for failure of flat roofs is lack of drain maintenance where gravel, leaves and debris block water outlets (be they spigots, drains, downpipes or gutters).
[1] [2] The top of the parapet wall projects above the roofline and the top of the brick or stone wall is stacked in a step pattern above the roof as a decoration and as a convenient way to finish the brick courses. A stepped parapet may appear on building facades with or without gable ends, and even upon a false front.
These include the waterproofing membrane used, adequate slope-drainage, proper flashing details, and proper construction materials. The penetrations through a building envelope must be built in a way such that water does not enter the building, such as using flashing and special fittings for pipes, vents, wires, etc.