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Shell
A house's shell consists of roofing,
siding and
windows.
Roofing is an important part of a houses shell.
Exterior walls are faced on the outside with some
type of durable siding. Insulation provides an additional
barrier to the movement of heat through a wall.
Roofing
Since roofs are the outer cover of a house it should
be both durable and attractive. It should be leak
proof and resist craking. Roof deck is made up of sheathing
and roofing felt. Mostly solid plywood is used as
deck. Roofing felt is placed between sheathing and
surface material. This repels any water on the roofing
material. Flashing helps in repelling water wherever
roof surface is broken. It is made up of galvanizing
steel.