JUAL

Shedlock

Shedlock - also known as fish - is a stainless steel ventilation hood that mounts close to the ridge for ventilation of roof spaces and pitched roof structures.

Efficient roof ventilation with stainless steel cowl

In both modern and older roof constructions, ventilation of roof spaces and roof surfaces is an important factor in maintaining a healthy indoor climate, preventing condensation, and extending the lifespan of the roof. One of the most discreet and effective solutions for this purpose is Shedlock, also known in the construction industry as clip fish or simply fish.

Shedlock (fish) from JUAL is a specially developed ventilation cowl in stainless steel, installed close to the ridge on pitched roofs. It is designed to ensure constant and natural air circulation in the roof space – without compromising the roof’s tightness, functionality, or aesthetics.

Purpose and function

Shedlock is used for the ventilation of roof spaces, knee wall spaces, and ventilated roof constructions where it is necessary to allow warm, moist air to rise and escape at the ridge. This process prevents moisture build-up and the formation of condensation, which could otherwise lead to rot, fungus, or damage to insulation materials and the roof structure.

By installing the ventilation cowl close to the ridge, a natural stack effect is achieved, where rising warm air is drawn out through the cowl and fresh air is supplied via ventilation openings further down the roof surface or at the eaves.

Construction and materials

JUAL’s Shedlock (fish) is manufactured in stainless steel, making it highly resistant to corrosion, UV radiation, and extreme weather conditions. The robust construction ensures a long lifespan and minimal maintenance – even under harsh climatic conditions.

The compact and streamlined design means the cowl integrates easily into the roof architecture without appearing intrusive. It is placed discreetly close to the ridge and presents a visually consistent appearance with other roof components.

Applications

Shedlock is ideal for:

  • Tiled roofs and pitched roofs

  • Detached houses, terraced houses, industrial and commercial buildings

  • Roof spaces and knee wall spaces requiring natural ventilation

  • Renovation projects where effective ventilation is needed without major intervention

  • Ventilated roof constructions with vapour barrier and insulation