Gutter Repair

Substrate DegradationProblem: Substrate Degradation

A roof gutter at eaves or central valley location forms the main component of a system which collects and diverts rainwater shed by the roof to protect a building’s foundation by channelling water away from its base. They also help to reduce erosion and protect painted surfaces by reducing exposure to water.

Rain gutters can be constructed from a variety of materials, including cast iron, lead, galvanised steel, copper, aluminium, PVC (and other plastics), concrete, asbestos cement and single-ply.

Reasons for failure are often as follows:

  • Clogged gutters can cause water leakage into the building as the water backs up. Clogged gutters can also lead to stagnant water build up allowing grasses and weeds to grow in the gutter.
  • Inadequate falls leads to poor drainage and standing water which promotes substrate failure.
  • Slow drainage causes accelerated oxidising (corrosion) at the waterline.

Fortunately, it’s usually the lining and not the gutter itself that needs replacing. Caught in time, most guttering can be treated and its protection indefinitely preserved.

Delcote Gutter Repair

Treatment: GIROSIL® Gutter RC-G

GIROSIL® RC-G is designed to fully treat the gutter through anti-corrosion treatment, joint and substrate encapsulation. Used with with GIROSIL® SE, (to seal defective joints), the coating system offers a seamless weatherproofing solution.


  • Fully moisture tolerant and solvent free, offering permanent flexibility.
  • UV and temperature resistant, unaffected by standing water.
  • Incorporating matchless  laminar flake, anti corrosion technology.


GIROSIL® RC-G is a solvent free elastomeric coating, with vapour breathable properties. It is fully moisture tolerant, can it can be applied to a damp surface and in the case of a galvanised gutter, offers matchless corrosion control. It has excellent elastic and flexible properties to withstand normal surface movements and remains unaffected by UV, temperature extremes or standing water.

Read more about GIROSIL ® RC-G

Defective Gutter Joints

Problem: Defective Gutter Joint

Some of the main problems encountered on leaking gutters originate from the joints themselves. Poorly installed seals or twisted and misaligned gutter sections often make it impossible to effect a watertight seal. Corroded bolts cannot be re-tightened.

The GIROSIL® Joint Specification is designed for this purpose, particularly in situations where the existing defective joint cannot be broken and reassembled.

Seamsil Treated SurfaceTreatment: GIROSIL® Joint Treatment

The GIROSIL® Joint specificationhas been developed against a background of decades of experience of roof repair and is designed to be user friendly in application, comprising gun applied GIROSIL® SE followed by brush applied GIROSIL®RC-G

GIROSIL®is used to provide an externally applied fully bonded flexible joint, capable of withstanding all normal gutter movements without cracking and at the same time ensuring that the joint remains totally watertight.


GIROSIL® is unaffected by weathering conditions such as sunlight, ultra violet radiation, rain, snow and temperature extremes. The excellent weather-ability and high temperature movement accommodation enables the system to perform after many years of exposure.

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