Velux GGU INTEGRA Uživatelský manuál stáhnout pdf (Strana 6)

Planning

6 VELUX

To be able to choose the right VELUX roof window for a given situ-

ation, it is always recommended to start from the construction of

the house, user requirements and current building regulations.

Normally, a standard VELUX roof window can satisfy the basic

requirements, but often choosing another window type or vari-

ant and/or choosing accessories can optimise the function and

increase the utility value of the window.

Planning must include the following aspects:

The distance between the rafters in the

roof construction usually decides the size

of the windows if cutting them and install-

ing trimmers is not an option. Therefore,

ﬁrst check whether the position chosen

and size of the roof windows ﬁt into the

existing roof construction or if rafters will

need cutting (see pages 16, 48).

The roof pitch is important when choosing

windows and ﬂashings. As a rule, VELUX

products can be used in roof pitches from

15° to 90°. However, there are exceptions

so always check whether the products

chosen can be used in the roof pitch in

question (see chapter 8).

The rooﬁng material decides the type of

ﬂashing to be installed around the window

to ensure a watertight installation. The

dierent ﬂashing types are described in

chapter 8, pages 124-126.

When there is underfelt in the roof

construction, a tight connection must be

established between the underfelt and the

window frame to keep out water and driv-

ing snow. The easiest solution is VELUX

underfelt collar BFX (see page 21).

The construction of the house

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Velux GGU INTEGRA Uživatelský manuál Strana 6