[0001] This invention relates to a unit that can be retrofitted into an existing top-hung
roof window, enabling the window to stay open for a prolonged period. The invention
removes the pitch of a roof to increase head height.
[0002] When a top-hung roof window is opened, it elevates head height and creates additional
functional space in a room. However, keeping a top-hung window open at all times exposes
a property to security issues and intermittent weather. It is possible to permanently
increase the volume of a room by installing a dormer-style window - however, this
requires planning permission.
[0003] To overcome these problems, this invention can be fitted to an existing top-hung
window to create a temporary dormer-style window structure.
[0004] The invention creates a wedge structure between the window and the roof, using two
insulated side panels, a top connecting bar, a bottom insulated joining panel, an
adjustable interior shelf, and a sealed double-glazed glass panel, which acts as an
additional window.
[0005] The unit is secured with hinge brackets, and operates using the locking mechanism
from the existing window.
[0006] The unit is a temporary structure - it can be installed and removed within a few
minutes. The structure does not require planning permission and can be used in conservation
areas.
[0007] This provides a unique solution; the unit is secure, weather proofed, and can be
in place on a long-term basis. It creates more functional space, whilst side-stepping
planning restrictions.
[0008] In the drawings:
Figure 1 shows an exploded axonometric drawing, which illustrates the five key components
of the unit. Two insulated side panels (1) with hinge brackets attached. A top connecting
bar (2), which connects the two insulated side panels (2). A bottom insulated joining
panel (3), which forms the bottom of the unit. A window panel (4), containing double
glazed sealed glass, which clips into the aforementioned hinge bracket. An adjustable
interior shelf(5), which can be levelled to allow for varying roof pitches.
Figure 2 shows the fully constructed unit. The components are fitted to an existing
top-hung roof window. The two insulated side panels (1) are slotted into place on
the existing window, supported by the top connecting bar (2) and the bottom insulated
joining panel (3). The window panel (4) is clipped into the insulated side panels
(1) using the hinge brackets attached. The interior shelf (5) is attached to the bottom
insulated joining panel (3).
[0009] Once in place, the unit allows the user to create a temporary 'dormer style' window,
elevating head height in a room. The unit can be attached to an existing top-hung
roof window, and is designed to adapt to varying roof-pitches.
[0010] Figure 3 shows the existing top-hung roof window in operation. It is possible to
open and close the existing window with the unit fitted.
[0011] Figure 4 shows a colour diagram of the unit attached to an existing top-hung roof
window.
1. Two insulated side panels (1), which attach to an existing top-hung window. A top
connecting bar (2) which connects to the two insulated side panels (1) using the hinge
brackets attached. A bottom insulated joining panel (3), which creates the bottom
of the unit, a window panel (4) containing a double glazed sealed glass unit, which
clips into the aforementioned hinge bracket on the insulated side panels (1). An interior
shelf (5) which attaches to the unit and can be leveled according to the pitch of
a roof.
