At Maguire Brothers, we understand that roof leaks can be a significant issue for industrial and commercial property owners. A leaking roof can lead to costly damage, disruption to business operations, and potential health and safety hazards. Identifying the common causes of roof leaks can help property managers take preventative measures to protect their buildings. Below, we outline some of the primary reasons industrial and commercial roofs develop leaks.
Flashings & Fillers
One of the most frequent causes of roof leaks is poorly installed or defective flashings and fillers. Issues such as missing foam fillers, insufficient butyl sealant, or loose fixings can lead to water ingress. Ensuring flashings are correctly sized and installed is crucial for maintaining a watertight roof.
Vents, Flues & Soil Stacks
Roof penetrations, including vents, flues, and soil stacks, are common weak points. Poor installation or inadequate waterproofing around these areas can result in leaks. The use of high-quality materials and proper sealing techniques is essential to prevent water from seeping through these openings.
Side Lap Seams & Joints
Metal and composite panel roofs are particularly susceptible to leaks at side lap seams and joints. If butyl sealant fails, or if corrosion and perforation occur at these junctions, water can easily penetrate the roof. Regular inspections and maintenance can help detect and address these issues before they become serious problems.
Fixings
Incorrectly installed or loose fixings can compromise the integrity of a roof. The wrong size or type of fixings, improper washer sizes, and lack of maintenance can lead to fixings working loose over time. Routine inspections ensure that any loose or missing fixings are identified and replaced promptly.
Roof Sheet Panels
Metal roof panels, especially in industrial settings, can suffer from corrosion or perforation over time. This can lead to leaks, particularly if the protective coatings on the panels have deteriorated. Condensation can also be a factor, further accelerating corrosion. Addressing these issues early can extend the lifespan of a roof and prevent costly water damage.
Intermediate Lap Joints
Poor initial installation or failed butyl sealant at intermediate lap joints can allow water ingress. Additionally, capillary action can draw water through tiny gaps in corroded sheet ends. Proper sealing and the use of high-quality materials can mitigate this risk.
GRP Rooflights
GRP (Glass Reinforced Plastic) rooflights are a common feature in industrial and commercial properties, allowing natural light into the building. However, if they are incorrectly installed or if the fixings and butyl sealant fail, they can become a major source of leaks. Over time, GRP sheets can also suffer from perforation and condensation-related issues, necessitating regular maintenance and potential replacement.
Gutters
Poor gutter maintenance is a leading cause of water ingress in commercial properties. Gutter joint details and bolts can degrade, and perforated gutter surfaces can allow water to escape. Additionally, inadequate gutter sizing, incorrect falls, and blockages can prevent water from draining effectively, leading to overflow and leaks into the building.
Looking for expert advice on your industrial property?
As a leading specialist in commercial roofing, we focus on re-roofing existing buildings across London and the South East. Contact our team today to discuss your requirements.
