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| Making the Frame Watertight |
Steps 1-9 |
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| Remove the window |
Remove the sash once more to continue with the installation.
Remember to push in the locking pin on each hinge. Support the
weight of the sash underneath whilst dislocating the hinges
and carefully place back inside roof. |
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| Making Watertight 1/9 |
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| Remove batten |
Remove the support batten.
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| Making Watertight 2/9 |
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| Cut the
waterproof membrane |
It is important to ensure the watertightness of a roof window
against the elements. It is therefore recommended that a collar
of waterproof membrane is placed around the frame. First cut
the four strips that will surround the frame.
 Click
for video |
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| Making Watertight 3/9 |
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| Loosen batten |
Loosen (or de-nail) the batten underneath the frame to allow
for the positioning of the new collar. |
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| Making Watertight 4/9 |
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| Attaching the membrane |
Starting with the bottom piece, slide under the batten and staple/tack
to the underside of the frame.
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| Making Watertight 5/9 |
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| Fixing membrane around battens |
When fixing the side pieces, make sure you cut and tightly fix
around roof battens. |
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| Making Watertight 6/9 |
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| Fixing the top of the membrane |
It is necessary to fix the top piece of membrane underneath
the existing roof membrane. If the roof is counter-battened,
it may be necessary to remove a small section of batten in order
to slide the cover piece into place. |
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| Making Watertight 7/9 |
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| Cut existing membrane |
Cut the existing membrane over the rafter to allow the top collar
piece to be slid underneath. |
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| Making Watertight 8/9 |
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| Overlap the membranes |
Lift up the cut piece and fix the top collar piece underneath
and to the frame. Replace the existing piece and fix. |
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| Making Watertight 9/9 |
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| Fixing the Frame |
Steps 1-9 |
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