An Integra Trim external corner joins two gutter-trim lengths at an outside right angle. The key details are the 4mm expansion gap and bonding only one inside edge of the corner component.
Butt the two gutter-trim lengths at 90 degrees with a 4mm gap, glue one inside edge of the external-corner component, activate the matching trim surface and hold the component until the bond is solid.
What you need
- Matching Integra Trim Gutter Trim External Corner
- Suitable superglue
- uPVC superglue activator
- Clean, dry and contamination-free trim surfaces
Four installation steps
- Form the corner. Butt-join the two gutter-trim lengths at the external right angle and leave a 4mm expansion gap.
- Glue one edge only. Apply superglue to one inside edge of the corner component so the other side can accommodate movement.
- Apply activator. Treat the gutter-trim surface that will meet the glued edge.
- Fit the component. Press it down into the corner and hold until the bond is solid.
Where gutter trim meets raised kerb
At an external transition, use the Raised Kerb external-corner component and remove only the Raised Kerb side of its backing arrangement as shown in the current manufacturer guide.
Shop matching components
Shop Solid gutter corners →
Shop Cellular gutter corners →
Frequently asked questions
Why glue only one side?
The free side allows the uPVC lengths to expand and contract with temperature without forcing the corner joint.
What size expansion gap is required?
The supplied external-corner guide states 4mm.
Can I use any corner component?
No. Match the component to the selected Solid or Cellular gutter-trim family and colour.
Which component joins gutter trim to raised kerb?
The manufacturer guide uses the Raised Kerb corner component for this external transition.
Need project-specific help?
Forti Nova supplies the FlexiProof system with practical product support. Send your maximum roof dimensions, deck type and details such as upstands, outlets, rooflights and corners before ordering.
Ask Forti Nova for free product advice → Training and installation support →
This web guide is based on the supplied FlexiProof manufacturer literature. Follow the current instructions supplied with the product, observe safe working-at-height practice and obtain project-specific design or structural advice where required.