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1. #Windows on top of house code
2. #Windows on top of house windows

In these cases, shading or other solar control measures should be considered. This can be most acutely felt when exposed to direct sunlight when the sky is clear.

#Windows on top of house windows

Skylights and roof windows can be a source of unwanted heat gain in a home. Any design should meet the current regulatory requirement for building compliance. The impact of skylights and roof windows on the thermal performance of a building is complex and depends on interacting factors: climate, orientation, materials, size and location of the skylights/roof window, shading, and their thermal properties.Įnergy-efficient technologies used for windows may be applied to skylights and roof windows. Check with the supplier that your preferred product meets the Australian Standard requirements.

To comply, a product needs to be tested or demonstrate that it complies with the Bushfire Attack Level (BAL) requirement of your home. In bushfire areas, skylights must comply with the Australian Standard AS 3959-2009 Construction of buildings in bushfire-prone areas. In addition, the NCC specifies minimum distances such skylights must be from property boundaries and adjacent buildings, from separating walls on adjoining buildings, and from any other roof lights.

#Windows on top of house code

Rule of thumb for spacing skylights to help achieve uniform lightingįire safety requirements under the National Construction Code (NCC) specify that if skylights are deemed combustible, the aggregate area of the skylights must not exceed 20% of the roof or part of the roof. They are also used for other living areas with a conventional flat ceiling where a plasterboard-lined light well and no diffuser is used to bring the outside in. Roof windows are commonly used for attic rooms where there is a cathedral ceiling but little roof space. Uninsulated metal frames can cause condensation during times of cooler weather, and lose heat to the outside through conduction. Frames are typically timber with external weatherproof cladding, but may be aluminium, steel or uPVC. This feature is highly recommended during summer conditions, especially in 2-storey houses where heat would otherwise tend to concentrate in the upper level.Īs with vertical windows, roof window frames come in a variety of different materials and have a major impact on thermal performance. Ceiling-level diffusers are rarely used with roof windows.Īlmost all roof windows use sealed double glazing to reduce heat losses while minimising condensation. Roof windows are usually combined with light wells or shafts in homes that have flat ceilings.

Roof windows are simply windows set into the roof of a home. They can simulate the effect of daylight by providing artificial light from LED lights, powered by solar energy. LED virtual skylights are an alternative in situations where a skylight is not easy or possible to install. Skylights typically have long white-coloured or flexible light wells and a diffuser panel fitted at ceiling level.įlexible tubing being used to direct sunlight into the room below The top glazing of the skylights can also be in clear or tinted glass, acrylic or polycarbonate. Skylights can be made of glass, acrylic, or single glazed ‘opal’ (ie light-diffusing) moulded units. Skylights, tubular skylights and roof windows Skylights Skylights and roof windows can be included during the design stage if you are building a home, or can be retrofitted to an existing home during renovation. Skylights and roof windows can be prone to damage during extreme hailstorm events, but careful design and choice of material will reduce the risk.