HOW TO INSTALL A ROOF WINDOW PRACTICAL ADVICE

We think it is relatively easy to install our roof windows as everything can be done from inside the property, however, ease of installation will always depend on your specific circumstances. Before you start the installation, there are a list of things that you need to take into consideration:

  • Are you installing your roof window into a new building?
  • Is this new build without a covered roof and without finished masonry?
  • Is it an established or inhabited house?
  • Does the roof have modern tiles or have you got a 100 year old slate roof?

We have organised these assembly instructions so that you can find exactly the right sections you need for your roof quickly. But should you have any concerns, you should seek the advice and assistance of a professional roofer because incorrect roofing and building work can affect the stability of the roof.

We can also advise you about the way to attach a snow guard to your roof window to avoid possible damage from snow.

Choose your product first:

 
Roof window installation sequences

Internal preparation

Prepare tools

Prepare tools

Before starting to install your roof window, make sure you have the relevant safety equipment and correct tools to hand. It will make a big difference!

Measuring

Measuring

Once inside the roof space, you may find that your rafters are covered in plaster board or other covering. If this is the case it is important to establish the correct place in which to make a hole. By measuring from an external wall, you will be able to accurately determine the position of the window in relation to the outside.

Marking out

Marking out

Once an approximate position has been determined, it should be marked out accordingly.

Pilot hole

Pilot hole

A pilot hole should be cut out and removed to allow for more accurate measurement.

Locate rafters

Locate rafters

By inserting a rule either side of the pilot hole, the rafters can be located and marked out.

Rafter edge

Rafter edge

It is useful to work from the inside edge of a rafter, so as to minimise unnecessary framing out of the window.

Removing insulation

Removing insulation

When removing insulation, ensure that you take appropriate precautions by wearing a safety mask and, if necessary, goggles.

Removing a rafter

Removing a rafter

If it is necessary to remove a rafter, it is important that you consider the structural implications of doing so. If you are uncertain, we recommend you seek professional advice before proceeding further.

The bigger picture

The bigger picture

It is better to remove the surrounding area of boarding so that you can see the big picture.

Support below and above

Support below

Be sure to support the area below where you are cutting the rafter.

Support above

... and secure support beneath the top of the rafter.

Cutting the rafter

Cutting the rafter

You can then mark out, cut and remove the timbers.

Cutting the rafter
Cutting the rafter
Framing out

Framing out

Frame out the prospective opening to the correct height and width.

Don't forget

Don't forget

... to allow enough height for the reveals to splay back at the correct angle.

Step 16

We think it is relatively easy to install our roof windows as everything can be done from inside the property, however, ease of installation will always depend on your specific circumstances. Before you start the installation, there are a list of things that you need to take into consideration:

  • Are you installing your roof window into a new building?
  • Is this new build without a covered roof and without finished masonry?
  • Is it an established or inhabited house?
  • Does the roof have modern tiles or have you got a 100 year old slate roof?

We have organised these assembly instructions so that you can find exactly the right sections you need for your roof quickly. But should you have any concerns, you should seek the advice and assistance of a professional roofer because incorrect roofing and building work can affect the stability of the roof.

We can also advise you about the way to attach a snow guard to your roof window to avoid possible damage from snow.

Choose your product first:

 
Installation sequences

Making the opening

Prepare tools

Marking out

Mark out the opening on the underside of the roof membrane. Do not remove more than necessary - you can always cut it back more later.

Measuring

Removing the membrane

Cut out and remove the membrane, exposing the battens and the roof covering.

Marking out

Tiled roof

If you have a tiled roof, carefully begin to remove the tiles from inside. Make sure the area below this roof area is clear to avoid injury or damage if an accident occurs.

Pilot hole

Composite thin tile covering

If you have a composite thin tile covering, you may need to drill and cut through to make the initial opening.

Locate rafters

Removing nails

If you have a slate covering it may be necessary to use a slate ripper to remove the nails.

Rafter edge

Removing tiles/slates

Remove sufficient tiles/slates to allow a good working area. Don't be tempted to remove too many though - you'll have to put them back later!

Removing insulation
Removing a rafter

Removing battens

Remove battens to the extent of the framed area.

We think it is relatively easy to install our roof windows as everything can be done from inside the property, however, ease of installation will always depend on your specific circumstances. Before you start the installation, there are a list of things that you need to take into consideration:

  • Are you installing your roof window into a new building?
  • Is this new build without a covered roof and without finished masonry?
  • Is it an established or inhabited house?
  • Does the roof have modern tiles or have you got a 100 year old slate roof?

We have organised these assembly instructions so that you can find exactly the right sections you need for your roof quickly. But should you have any concerns, you should seek the advice and assistance of a professional roofer because incorrect roofing and building work can affect the stability of the roof.

We can also advise you about the way to attach a snow guard to your roof window to avoid possible damage from snow.

Choose your product first:

 

Fixing the frame

Fasten a batten

Fasten a batten

After determining the correct height of the window installation fasten a batten to support the window frame.

Separate sash from frame

Separate sash from frame

To install the frame, it must first be separated from the sash. Open the sash and rotate it through 180 degrees.

Unlocking the hinge

Unlocking the hinge

Locate and press the locking mechanism on each hinge (it should make a click) and separate the sash from the frame.

Once the hinges are released, carefully separate the sash and place to one side (store horizontally).

Placing brackets

Placing brackets

Installing the frame

Installing the frame

Carefully pass the frame (with brackets fixed) through the opening. Place frame on support batten and lay flat on rafters.

Check frame alignment

Check frame alignment

If level, fix the bottom brackets.

Final alignment check

Final alignment check

Replace the sash to test that it opens and closes properly. If it is not closing properly it is best to find out at this stage.

Alignment checks

To make sure the frame is set properly, check the gaps at the closure of the sash. If the vertical gaps are parallel with the gap at the bottom in a slightly opened position, then the frame is correctly aligned, and the top brackets can be fixed.

Check alignment
Plastic wedge supplied

A plastic wedge is supplied to pack the bracket where there is an uneven rafter.

Install the brackets

Install the brackets

We think it is relatively easy to install our roof windows as everything can be done from inside the property, however, ease of installation will always depend on your specific circumstances. Before you start the installation, there are a list of things that you need to take into consideration:

  • Are you installing your roof window into a new building?
  • Is this new build without a covered roof and without finished masonry?
  • Is it an established or inhabited house?
  • Does the roof have modern tiles or have you got a 100 year old slate roof?

We have organised these assembly instructions so that you can find exactly the right sections you need for your roof quickly. But should you have any concerns, you should seek the advice and assistance of a professional roofer because incorrect roofing and building work can affect the stability of the roof.

We can also advise you about the way to attach a snow guard to your roof window to avoid possible damage from snow.

Choose your product first:

 

 
Installation sequences

Making the frame watertight

Remove the sash

Remove the sash

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.

Cut the waterproof membrane

Cut the waterproof membrane

It is important to ensure the water tightness 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.

Loosen batten

Loosen batten

Loosen (or de-nail) the batten underneath the frame to allow for the positioning of the new collar.

Attaching the membrane

Attaching the membrane

Starting with the bottom piece, slide under the batten and staple/tack to the underside of the frame.

Fixing membrane around battens

Fixing the membrane around battens

When fixing the side pieces, make sure you cut and tightly secure around roof battens.

Fixing the top of the membrane

Fixing the top of the membrane

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.

Cut existing membrane

Cut existing membrane

Cut the existing membrane over the rafter to allow the top collar piece to be slid underneath.

Overlap the membranes

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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