New estates around Penrith pack houses tight. A first-floor bedroom looking straight into the neighbour’s kitchen is a common complaint. Curtains block the view but also block the light. Privacy louvres block the sight line at the specific angles that matter while letting the daylight through. The trick is picking a blade pitch that works for both.
What privacy louvres do
Fixed angled blades set at a specific pitch (typically 30 to 45 degrees from horizontal) block line-of-sight from below and from the sides while allowing skyward light in. The room stays bright, the view out to the sky remains, but the neighbour’s ground-floor windows are invisible from your bedroom.
Working out the blade angle
Two data points decide the angle. The height difference between your window and the target line of sight (usually the neighbour’s window or their outdoor entertaining area), and the horizontal distance to it. From those you calculate the sight-line angle, then set the blade pitch to be steeper than that. A quick sketch on the site visit works out both numbers in ten minutes.
Blade options for privacy louvres
- Horizontal aluminium blade at 30 degrees, 100 mm centres: near-total sight-line blocking below the horizontal, high daylight retention
- Horizontal aluminium blade at 45 degrees, 75 mm centres: full sight-line blocking including some ground-level, moderate daylight
- Vertical aluminium blade at 45 degrees, 150 mm centres: side-angle sight-line blocking, ideal for windows facing a neighbour side wall
- Glass louvre with obscure or fluted glass at flat pitch: privacy from any angle, some daylight loss, but see-through when open
Heat management as a bonus
Privacy louvres are also solar shading. A west-facing louvre bank cuts direct summer sun into the room by 60 to 90 percent depending on blade pitch and depth. In a Penrith summer, that is a measurable difference in aircon load. In winter, the low sun angle actually passes under the blades in most designs, so you keep the passive heating.
Fixed versus adjustable for privacy applications
For pure privacy screening, fixed is usually the right call. Set-and-forget, no mechanism to service, cheaper to install. Adjustable makes sense only if the sight-line target is intermittent (say the neighbour uses their entertaining area seasonally and you want a clear view most of the year). Otherwise fixed is more reliable and looks cleaner.
Where the daylight actually goes
A well-designed privacy louvre bank retains 40 to 65 percent of the daylight the unblocked window would have received. Compare that to a heavy curtain (typically 5 to 15 percent) or a Venetian blind at closed pitch (10 to 25 percent). The room reads bright and airy while the sight line is closed. See our louvre and window service for the design process.
Residential context around Penrith
Newer subdivisions in Glenmore Park, Cranebrook and Jamisontown have first-floor windows facing the neighbour at eight to twelve metre separation. That is right in the sweet spot for fixed privacy louvres. We do a handful every month, mostly on bedroom and ensuite windows where the sight line is intolerable but curtains would be a waste.
Sight-line concern with the neighbour and hate the curtain solution? Ring 02 4722 2787. We come out, measure the actual sight-line angle and quote a louvre bank designed for your specific problem.
Frequently asked questions
Can louvred sight-line screens be added to an existing window without replacing the frame?
Yes. Most screens install as an external panel mounted to the wall around the existing window. The window itself stays as it is. Fixing depends on the wall type (brick, cladding, render) and we assess on the quote visit.
Do angled blade screens reduce natural ventilation from the window?
Marginally. Air still passes between the blades. Compression of the flow through the louvre reduces the effective wind velocity into the room by around 20 to 40 percent. Usually not enough to matter for cross-ventilation purposes.
Do external sight-line screens need council approval?
External screens that alter the streetscape or exceed certain size thresholds may need a development application. Most residential-scale screens on side or rear elevations are exempt under complying development. Council checks are worth doing before install.
