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Slate
Welsh slate comes in a range of set sizes
and his purple or green colour.
Green Westmorland slates and quarried
in the Lake District
and come in random and set sizes.
Lancashire slates,
also known as Burlingtons, are set and random sizes and black in colour
Delabole slates come from Cornwall,
are random sized and have a colour variation from Green through to Brown.
The only Scottish Slate is from Ballachulish. This is a small, thick random slate with deposits of iron pyrite (fools Gold). They are commonly referred to as “peggies”.
A variety of imported slates are also available
in different colour textures and variable quality. Currently, the two most common
sources of imported slates at Spain and China


Stone slate.
Stone slating is one of the oldest forms of slate
roofing and is found mainly in the high Pennine regions of Britain. The
slates are made from sandstone and come in random lengths and widths.
The slates Aztecs by hanging of paying through
the head of the Slate, which hooks on the lath below. In the original pegs were
formed from sheeps bones, the system was later modified to use hardwood pegs. Today
Matthew Charlton have perfected the fixing, using a large copper pin and neoprene spacer, which is nailed directly into the
lath.
This provides a more secure fastening, whilst
maintaining the integrity and longevity of the roof. The ridge and hip details
are usually finished with a stone ridge tile, but laced ridge can be found in more sheltered areas.


Tiling
roof tiles come in two forms, single lap and double
lap. Traditionally tiles are made from clay, but latterly concrete tiles have
become an increasingly popular alternative.
The oldest type of tile is a dished clay pantile,
which dates back to Roman times, this is a single lap tile. The most popular
and decorative tile is the plain tile, commonly known as the ‘Rosemary tile’
this is a double lap tile.
Originally all
Tiles were handmade in clay, but the introduction of modern machinery has both increased production and reduced the
costs of tiles of the roofing material.
Concrete tiles have become particularly popular
in the new housing market, using a single lap interlocking system.
Many accessories and decorative details can be
added to a tiled roof to enhance the aesthetic appearance. Popular additions
are bonnet and arris hips, finials, crested ridge, swept and laced valleys, eyebrow dormers and patterned or shaped titles.

Cedar shingles
Cedarwood shingles were originally used in North America and Scandinavia
as they are best suited to a dry cold climate.
However they provide an unusual and decorative
roof covering and have been therefore become more popular on older housing throughout the UK.
Cedar shingles are strips of cedar wood cut in
random widths approximately 16 inches long. The strips taper back from 3/8”
thick to nothing at the head.
One the most prestigious cedar wood contracts
Matthew Charlton has been involved with is the Alnwick garden treehouse. This
is a mixture of both shingles and shakes and these have been laid on the way that gives the impression of extreme age.
Lead
Lead sheet has many applications as a weathering material in roofing
systems. It is mainly used for valleys, sumps, gutters, flat roofing, domed roofing, flashings and soakers.


Hard Metal
Hard metal roofing materials such as copper, zinc and stainless steel are laid
in similar fashion to lead sheet. The advantage of hard materials is they can be laid in much greater lengths, making them
ideal for very shallow pitched applications


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