An internal gutter-trim corner joins two Integra Gutter Trim lengths where they meet at an inside right angle. Leaving movement room is as important as the adhesive bond.
Butt the two trim lengths at the inside corner with a 4mm expansion gap. Apply superglue to one inside edge of the matching corner, use uPVC activator on the corresponding trim face and hold until bonded.
What you need
- Matching Integra Trim Gutter Trim Internal Corner
- Suitable superglue
- uPVC superglue activator
- Clean, dry and contamination-free trim surfaces
Four installation steps
- Set the corner. Bring the two gutter-trim lengths together at the internal right angle with a 4mm gap.
- Glue one inside edge. Do not glue both sides; the joint needs to accommodate expansion.
- Activate the trim. Apply uPVC activator where the glued edge will land.
- Press and hold. Seat the corner component firmly and hold it until adhesion is solid.
Shop internal corners
Shop Solid gutter internal corners →
Shop Cellular gutter internal corners →
Frequently asked questions
What gap do I leave?
The supplied guide states a 4mm gap between the two trim lengths.
Should both sides of the corner be glued?
No. The manufacturer instructs installers to glue one inside edge only.
Is uPVC activator optional?
It forms part of the stated installation method and should be used as directed with the compatible superglue.
Are internal and external corners interchangeable?
No. Use the component made for the geometry and the exact trim family.
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.