What is a skylight curb?
When we talk about flat roof windows or skylights, the curb or upstand plays a crucial role. But what exactly is a skylight curb?
It's easy to conclude that a curb or upstand is an essential part of your flat roof window or skylight. It not only ensures proper installation and weather protection, but also contributes to the energy efficiency and appearance of your home.
Materials of Skylux curbs
| Unique features | PVC curbs | Polyester curbs | Metal curbs |
|---|---|---|---|
| Highly insulating | ✓ | ✓ | ✓ |
| Can be used anywhere | ✓ | ✓ | |
| Beautifully finished | ✓ | ✓ | ✓ |
| Easy to maintain | ✓ | ✓ | ✓ |
| Lightweight and still very sturdy | ✓ | ✓ | ✓ |
| Fully recyclable | ✓ | ✓ | |
| Easy to install | ✓ | ✓ | ✓ |
| Interior sunblind possible | ✓ | ✓ | |
| Different forms possible (square, rectangular, round) | ✓ | ✓ | ✓ |
| Suitable for industrial applications | ✓ | ||
| Available in different heights | ✓ | ✓ | ✓ |
Types of PVC curbs
20/00 EP & EP-S
Super insulating PVC curbs 20/00 EP and EP-S are the perfect choice for extra insulation. Adjustable in height for various insulation thicknesses, they are UV-stabilised for long-lasting quality. The useful lining groove allows you to connect your ceiling finish seamlessly.
16/20 EP
Super insulating, innovative design and robust strength: these curbs are perfect for standard use. The useful lining groove ensures a sleek ceiling finish. In case of a daylight size of 100 x 100 cm, use a roof opening of 120 x 120 cm or 124 x 124 cm with the lining groove included.
16/00
Perfect for refurbishments, this curb is your go-to choice when replacing straight wooden or metal curbs. It's suitable for a SHE system like Skymax CE or Skylux 160° CE, with a minimum curb height of 30 cm. Perfect for a seamless upgrade of your roof.
30/20
With its 30 cm height, this curb is perfect for supporting extensive roof insulation packages. It's designed to meet the standards of 30 cm height for SHE systems without additional carpentry. Suitable for a CE-certified SHE system such as Skymax or Skylux 160° CE.
35/30
This curb is placed over an existing curb without any cutting or demolition work on the roof. The height of the vertical part at the bottom is 150 mm. Perfect for additional insulation. In the vertical zone of the 35/30 curb, a CE compliant SHE-system Skylux 160° CE can be provided.
| PVC curbs | Uup-value |
|---|---|
| PVC 16/20 EP | 0.89 W/m²K |
| PVC 16/00 | 1.00 W/m²K |
| PVC 20/00 EP & 20/00 EP-S | 0.64 W/m²K |
| PVC 30/20 | 1.00 W/m²K |
| PVC 35/30 | 0.86 W/m²K |
Uup-value: U(upstand) or insulation value of the curb according to EN 1873:2014 and determined by EN 10077-2:2012 *according to EN 1873:2014 and determined by EN ISO 12567-2
Quick and easy to install
1. Screw the curb
Screw the curb to the roof structure with suitable screws through the indication line of the flange. Start 7.5 cm from the ends. The axial distance of the other screws may not exceed 30 cm.
2. Pull up the roof covering
Next, pull the roof covering up against the curb. Please note that the membrane and not the curb is heated during flame welding. For all types of roofing systems, we refer to the instructions of the roofing manufacturer.
Additional tip: before finishing with EPDM roofing, it is best to first apply a strip of vulcanised foil at the detail recesses.
3. Install the skylight/window
When installing your skylight or flat roof window on the curb, it's crucial to guarantee the stability and safety of the installation. Follow the installation instructions for a correct installation.
ADAPTABILITY FIRST
Create the perfect height with 20/00 EP-S
Voor extra hoogte of aanpassing aan variërende isolatiediktes is de 20/00 EP-S, zonder onderflens, een perfecte aanvulling. Door de EP-S bovenop de 20/00 EP of een andere opstand te plaatsen, kunt u eenvoudig de ideale hoogte voor uw dak creëren. Deze combinatie biedt een flexibele oplossing voor elk dakontwerp, waarbij functionaliteit en aanpassingsvermogen vooropstaan.
Read more in the installation instructionsTypes of PVC curbs
| Polyester curbs | Uup-value |
|---|---|
| Polyester PO15/25 | 1.32 W/m²K |
| Polyester PO15/20 - PO30/20 - PO50/20 | 0.80 W/m²K |
| Polyester PO30 EP60 | 0.35 W/m²K |
| Polyester PO30 EP100 | 0.23 W/m²K |
| Polyester PO30/00 - PO50/00 | 0.80 W/m²K |
Uup-value: U(upstand) or insulation value of the curb according to EN 1873:2014 and determined by EN 10077-2:2012 *according to EN 1873:2014 and determined by EN ISO 12567-2
Types of metal curbs
M15
M20
M25
M30
M40
M50
| Metal curbs | Uup-value |
|---|---|
| Metal M15-M20-M25-M30-M40-M50 (insulated) | 0.84 W/m²K |
| Metal M15 EP-M20 EP-M25 EP-M30 EP-M40 EP-M50 EP (insulated) | 0.51 W/m²K |
| Metal M15-M20-M25-M30-M40-M50 (not insulated) (round curbs are not insulated) | > 100 W/m²K |
Uup-value: U(upstand) or insulation value of the curb according to EN 1873:2014 and determined by EN 10077-2:2012 *according to EN 1873:2014 and determined by EN ISO 12567-2
Discover EPB-compliant solutions
The right curb with the right skylight or flat roof window
The following table shows an overview of our skylight solutions that meet EPB-standards. These solutions have a U-value of less than 2.0 W/m²K according to the 3g software, which means they have high thermal efficiency and contribute to energy savings.
Read moreFull control and functionality thanks to our accessories
Complete your Skylux iWindow or skylight with our accessories. Exterior sunblinds, interior sunblinds, blackout blinds or electric insect screens - we offer various options to meet your needs. Enjoy ultimate control, functionality, and comfort.
Interior sunblind
Create a cosy atmosphere and regulate the amount of daylight with our stylish interior sunblinds, specially designed for iDome hybrid skylights.
Blackout blind
Enjoy a good night's sleep or create a perfect environment for audiovisual presentations with our blackout blinds for skylights and flat roof windows.
Insect screen
Keep annoying insects out and enjoy fresh air without worries. Our electric insect screens offer easy and effective protection.