All Luxin loft windows and attic skylights are supplied with flashings and structures suitable for installation on any roof or over structure.

The installation can be done easily on either concrete or wooden roofs, into the groundwater or levels with walls or raised elements, with wave-type roofing slates or tiles or sheathing or composite slates.

When ordering, it is important to communicate the roof structure with its composition in order to decide the type of suitable and optimal installation, preparing the frame with the right features such as flat flashing, rigid brackets, in addition to opening, etc ...

In newly constructed roofs, the recommended classical installation is in the opening with a hole larger than about 1 cm per part, remembering to make the hole taking into account the standard size of base by height.

During rebuilding when renovating and replacing it is common to find holes already made for older windows with sizes no longer marketed; to avoid altering the structure of the building, installation can be carried out beyond the opening with the window larger than the hole.

type of installation
tipologia di posa

Where it is impossible to do otherwise, and you want precise work down to the centimetre, windows and skylights are made to measure, adapting the frame to the existing hole.

Where you want to increase lighting of the environment or fill a large hole where one fixture would not be sufficient, it is possible to create compositions of windows side by side, overlapping or twinned with special connections that engage and combine all the fixtures, creating an environment with greater lighting and ventilation.

There are many types of installation and solutions available for obtaining accurate and optimal work.


It is very important it is to countersink the hole in order to create better air circulation and expand direct light into the interior of the home.

The lower part of the hole (1) must be perpendicular to the floor and the upper part (2) must be parallel to the floor.

The hot air rising (1) dries the inner pane of the window without stopping in the cone created in the ceiling and comes out at the top (2), helping to limit the formation of condensation significantly.

The light is able to enter and illuminate the inner area limiting the points of shade in both the lower part (1) and in the upper part (2) of the loft; the cone of light that enters is much broader giving considerable natural lighting.

In attics that are not too high, it is possible to gain more height (2).

hole countersinking


The standard classical installation is when the hole in the roof is larger than the external frame of the window.

Luxin's advice is to design a hole that is 1 cm larger per side creating the overlap suitable for allowing the window to enter and be squared.

The fixing is carried out with pre-drilled brackets already inserted in the fixture between the bin and the flashing; tessellate inside the hole.

The void between the window and the hole will be closed with polyurethane foam to prevent draughts and heat leakage from the inside to the outside.

In wooden roofs, finishing work will be performed with padding that will be masked in the window thickness in the specific groove, while in concrete roofs plasterwork will be carried out flush with the inside walled bin.

standard installation in opening


When carrying out building renovations and old windows to be changed are replaced, already made holes are often found that you do not want to change, or you do not want to alter the structure of the existing building; in such cases installation is often made outwith the opening.

Installation outwith the opening occurs when the hole is smaller than the outside of the window frame and the frame is laid directly on the roof without entering inside.

It is important that the size of the hole is not less than inside of the window because in this case a model is installed with an opening that protrudes inwards, like mod. B with tilting opening where opening must be permitted without preventing the sash from protruding into the house.

It is also important to know if there is insulation on the roof or not in order to create a suitable flashing.

The fixing is made by rigid L-shaped brackets that protrude from the flashing to be tessellated directly outside.

installation outwith opening



- Standard contoured flashing with folds and apron in the lower part

In covers where corrugated roof tiles/slates or plates with great thicknesses are installed, the appropriate flashing is the standard flashing to ensure proper protection and correct rainwater flow.

At the top and laterally, a contoured flashing with folds is supplied that should be covered by the sheath and then topped with the suitable coverage (slates or tiles), while at the bottom a contourable and shapeable apron is applied to go over the cover and allow water to drain over the slates or tiles.

flashing installation for loft windows
standard flashing for loft windows
types of flashing for skylights
  • Flat flashing without apron

When the cover is composed only of bituminous material, sheaths, composite slates or you must instal the window on edgings, the ideal flashing is flat without apron.

The flat flashing should be noted and communicated when ordering.

This type of flashing makes it possible to pass over the flat cover around the window correctly, thus ensuring an excellent grip and effective rainwater flow.


flat flashing
flat flashing


When you have to cover a large hole and a window alone cannot fill it totally, it is possible to create interlocks flanking, overlapping or composing several windows.

A specific made to measure flashing is created that is suitable for hooking the windows and joining them.

These special and customised compositions are studied by Luxin according to the hole measurements provided by the customer, seeking to create the composition with most attractiveness and impact by inserting standard measurements or where this is not possible by customisation.

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