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Roofer
Asphalt Barge Board Batten
Bonnets Built-up felt Eaves
Flashing Flaunching Gable
Hip Interlocking Nail sickness
Pegged Clays Pitch/Pitched Plain clays
Plain concretes Redland 45s Sarking
Soffit Tingles Under cloak
Valley    
ASPHALT
A mixture of bitumen and fine minerals such as clay which is hot-trowelled onto roofs. The melting point is higher than tar so it has higher weather resistance. Asphalt occurs naturally in Trinidad bubbling up in lakes ready mixed with sand, but over extraction has depleted this resource.
BARGE BOARD
The boards fixed against the roof covering on a gable roof.
BATTEN
Treated soft wood, measuring around 25x38mm, which is laid horizontally on top of the sarking felt to hook the tiles / slates on to.
BONNETS
The rounded quadrant shaped tile, which is laid over the hip.
BUILT-UP FELT
Used on flat roofs to provide weathering and so-called as it is laid in two or three layers. The felts may be standard bitumen based or high performance polymer based - the latter has good flexibility properties. Felts are laid in hot bitumen or have the bitumen factory-applied to be melted on-site with a flame torch.
EAVES
The area under the overhanging part of a roof.
FLASHING
A metal sheet cut into brickwork and then dressed over a surface below, used to deflect water from a joint between two adjacent materials, such as brickwork and tiles.
FLAUNCHING
The sand / cement fillet around a chimney pot.
GABLE
The vertical end of a building with a pitched roof where the end wall goes up to form a triangle.
HIP
On a roof which has slopes on all surfaces, i.e. like a pyramid, the long sloping ridge is called the hip and inside, the rafter is the hip rafter.
INTERLOCKING
Usually constructed from coloured concrete, interlocking tiles have interlocking edges and hooked tops. The interlocking sides provide weather resistance without the great overlap of plain tiles, so the weight over an area is lower. However, the tiles are considerably heavier than slates, therefore it is very important to check that the roof structure is strong enough to bear the weight. Interlocking tiles are much cheaper than plain tiles and are a favourite on lower cost houses as a replacement for slates. When looking for new property, be suspicious of older houses that have new interlocking tiles, especially if similar houses in the area have slates. Visible raised areas of tiles on the roof, at the point where two homes join, are a sure sign of overloading of the roof structure. Interlocking tiles work well at low pitch angles and in exposed areas.
NAIL SICKNESS
Copper nails used to fix slates will corrode in time, particularly with the effects of acid rain in city areas. The result is slipping slates.
PEGGED CLAYS
Clay plain tiles that have wooden pegs to hook over the battens instead of the hook formed in tile material. These tiles are found on older buildings and are expensive to replace.
PITCH / PITCHED
The angle of a roof where two slopes meet the ridge. This is referred to as a pitched roof but often incorrectly labeled an 'apex roof'.
PLAIN CLAYS
The traditional tile is termed flat but has a slight round to spot water creeping up between courses. The size is generally 265x165x10mm thick and the tiling will be three thick at the maximum overlap. This provides the best resistance to wind driven rain but makes the covering heavy compared to slate or interlocking tiles.
PLAIN CONCRETES
Similar in colour and size to plain clay tiles, but at lower cost.
REDLAND 45'S
A common interlocking tile made in concrete with two indent lines and flexible ridges.
SARKING
This is the waterproof felt lain immediately under the roof tile battens to keep out wind driven snow and dust. This also acts as a second waterproof layer.
SOFFIT
The undersurface of any part of a building such as the arch, eaves or cantilevered section.
TINGLES
When faced with slipping slates through nail sickness, there is no easy solution as the slate above prevents access to the damaged nails. In such a situation, it is possible to insert strips of zinc or copper, bent into long 'S' shaped hooks, to catch the bottom of the slipped slate. This can then be hooked over the top of the slate above from underneath. These 'S' shaped hooks are known as tingles.
UNDER CLOAK
Where tiles or slates overhang the gable bargeboard, the underside is bedded in mortar and finished with special tiles, slates or a inert board, called the undercloaking.
VALLEY
Where two sloping roofs meet, as with two mountains, the valley is the line between.
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