About McWilliam Windsocks

McWilliam Sailmakers has been established since 1971 to be better than the standard.

In 1975 we bought our own plane to overcome delivery difficulties from Ireland to Europe. We found that it was impossible to buy a windsock that would last more than one year, so we made our own from sailmaking quality materials. Other fliers soon began to notice, and orders began to flow. We have grown into one of the largest windsock suppliers in the world.

We pride ourselves on our ability to provide top class service from our initial contact with our customers to our excellent on going service and distribution. We have a team of employees who will take care of all your needs and be happy to answer any queries you might have.

Originally designed for airfield use, the windsocks, swivels and masts are now increasingly sold to industrial and chemical plants. They are crucial for informing emergency services of the ambient wind direction and strength in the event of fire or gas leakage. Many industrial plants in Ireland need a windsock in order to comply with Environmental Protection Agency licensing requirements.



This €3.7 million project was needed to upgrade the existing wastewater treatment plants at Castlecomer, Urlingford, and Stoneyford and the construction of a new pumping station at Castlecomer to serve approximately 4,600 Population Equivalent (PE). The upgraded plants have improved and protected the watercourses that receive treated effluent and ensure that treated wastewater complies with EPA standards and regulations.

Prior to the completion of this project, treatment of wastewater at these plants serving the areas did not meet the required environmental standards. This resulted in treated wastewater being discharged into the River Barrow and River Nore SAC (Special Area of Conservation). Untreated stormwater overflows were also discharged to the rivers during periods of high rainfall. The opening of these plants helped to end this practice, leading to significant improvement in water quality, bringing benefits for everyone in the county.

McWilliam Windsocks supplied and maintains windsocks which are required on site as wind direction indicators. These are required by the an EPA license which is enforced on the site.

Irish Water is progressing work on a major project to improve water supply for residents of Kilkenny city and surrounding areas as part of the Kilkenny Regional Water Supply Scheme upgrade. This will benefit approximately 27,000 people by providing a more secure and reliable water supply for the City.

McWilliam Windsocks supplies windsocks for the Troyswood Water Treatment plant to satisfy their EPA license requirements.

Novartis Ringaskiddy is home to both the manufacturing site, Novartis Ringaskiddy Limited (NRL) and Novartis International Pharmaceutical Ltd, Branch Ireland (NIPBI) which is comprised of the International Services Laboratory, the External Supply Organisation, Supply Chain and administrative functions.

Employing approximately 600 people across the Ringaskiddy campus both NRL and NIPBI are important members of the Novartis global network.
Operational since 1994, NRL is a manufacturer of intermediates and active pharmaceutical ingredients. The €850m facility includes manufacturing operations, quality control laboratories, warehouse, technical, IT and engineering services.

McWilliam windsocks supplied Novartis Ringaskiddy with windsocks and equipment which is required to fulfill it’s EPA licensing obligations. We have worked with Novartis Ringaskiddy since its facility was constructed. Our high visibility windsocks act as wind direction indicators for staff and emergency services. This becomes particularly important in the unlikely event that there is a hazardous materials release within the compound.

Our windsocks have a lifetime of up to four years at the Ringaskiddy site – much longer than other windsocks at other sites – according to Novartis staff who have worked elsewhere.

Located in Co. Kerry on Ireland’s southwest coast, Dingle Harbour is set into the Dingle Peninsula on the northwest side of the extensive Dingle Bay. The well sheltered natural harbour has an inner harbour on its northern shore that hosts a fishing port, a marina, and a shallow draft anchoring area adjacent to the provincial market town.

In 2017 the harbor authority decided a windsock was needed to aid approaching craft to navigate the narrow channel and moor in the harbor, both day and night. McWilliam Windsocks supplied an internally illuminated windsock which was mounted on top of the harbor board workshop at the end of the harbor’s main pier.

The unit was manufactured to be installed on an already existing base plate on top of the workshop building. The unit was fitted on site and put into operation by harbor authority staff, requiring no special tools or equipment.

Saudi Arabian Oil Company (Saudi Aramco) awarded a $500 million contract to SNC-Lavalin to build the second phase of its shale gas development in Turaif,

The second phase, System B, will include processing facilities, wellheads and pipelines, and add 200 million standard cubic feet a day (scf/d) of gas capacity.

Japan’s JGC Corporation is currently building System A, which will add nearly 70 million scf/d.

Gas will be sent via pipeline from Turaif to the Waad al-Shamal power plant, which is currently under construction. 

McWilliam Windsocks supplied a complete set of windsock masts, swivels, and windsocks for the System B project through SNC-Lavalin, adding another major portfolio project from Saudi Aramco to the McWilliam Windsocks project book.

A total of 55nos windsocks, swivel hoops, and masts were supplied and installed for the project. McWilliam Windsocks went through a rigorous vendor qualification process and worked closely with SNC-Lavalin to provide the best solution for the Aramco project.

McWilliam Windsocks continues to support the project to this day.

Sadara Chemical Company (Sadara) is a joint venture developed by Saudi Aramco and The Dow Chemical Company (Dow). Saudi Aramco is one of the leading energy suppliers in the world. Dow Chemical is one of the world’s largest specialty materials companies. Together, the companies formed Sadara Chemical Company. Fluor was selected to perform work related to the world-scale Sadara integrated chemicals complex in Al Jubail, Saudi Arabia. The project was estimated to be a $20 billion investment.

Sadara’s challenge was to own and operate the integrated chemicals complex. The integrated facility was designed to be the largest petrochemical facility to be built in a single phase.

It would contain 26 chemical manufacturing units for ethylene (approximately 1.4 million tons per year) and propylene (approximately 400,000 tons per year), in addition to a differentiated slate of other plastics and chemical products.

McWilliam Windsocks worked closely with Fluor Arabia to deliver top quality windsock projects to the Sadara Project. Several large orders were placed over a three year construction period, each with their own unique requirements. McWilliam windsocks have since earned international recognition for our professionalism and the extremely high quality of our products which perform above and beyond expectations in the harsh desert environments of Saudi Arabia.