How to make an upstand - curb

Installation guide example for making a Curb - Upstand for a 100x100 cm Skylight.

Requirements:

• Wooden beams 69 mm wide
• Carpentry tools (saw, hammer, nails/screws)
• Roof covering material
• Insulation material
• PU Glazing tape
• Wooden batten of 2"x1" (22x50 mm)
• Silicone sealant Dowsil 791 Black Waterproof

Step-by-step plan:

1. Preparation of the Opening:

• Measure and mark an opening of 1000x1000 mm on the roof.
• Ensure the opening is accurate and cut it out.

2. Construction of the Curb - Upstand:

• Use wooden beams 69 mm wide to build the Curb - Upstand.
• The internal dimension of the Curb - Upstand must be 1010x1010 mm (10 mm larger in width and length than the opening).
• Firmly assemble the Curb - Upstand.

3. Applying the Slope:

• Ensure that one side of the Curb - Upstand is higher than the other side to create a slope of 5-6 degrees.
• Use a rise of 10 cm per linear meter to achieve the correct slope. This ensures that rainwater can drain off.

4. Installation of the Curb - Upstand:

• Place the timbered Curb - Upstand on the roof above the opening.
• Securely attach the Curb - Upstand to the roof.

5. Insulating the Curb - Upstand:

• Start applying roofing on the top of the Curb - Upstand.
• Continue with the outer sides of the Curb - Upstand.
• Continue with a piece of roofing over the old roofing.
• Ensure the roofing overlaps the existing roofing by at least 15-20 cm.

6. Installation of the Skylight support (batten 22x50mm):

• This is a crucial step, as this support will ultimately bear the weight of your Skylight.
• Note: the warranty is void if no glazing tape is applied.
• Use the recommended PU Glazing Tape, available on our website under the "Accessories" category.
• The Skylight support consists of a wooden batten of 2"x1" (22x50 mm) and must be placed 47 mm below the top of the Curb - Upstand on all four inner sides (see technical drawing in product photos).

7. Applying glazing tape:

• Apply glazing tape to the wooden batten to correct any unevenness and prevent pressure. This protects the lower laminated glass pane from cracking.

8. Installation of the Skylight:

• After the Curb - Upstand is fully assembled and insulated, the Skylight can be installed.
• Follow the installation instructions for correct placement.

Tips:

• Always check if the Curb - Upstand is watertight before installing the Skylight.
• Work carefully and ensure all measurements are accurate to avoid problems during installation.
• Consult a professional installer for additional help and advice if necessary.