About Us

Poly Passive Mouldings, trading as Passive Sills, is the leading specialist provider of super lightweight, thermally efficient, and cost-effective window sills, oversills, and insulated thresholds, compliant with current Irish and UK building regulations and energy efficiency standards. We design, fabricate, and supply our products to commercial and residential projects internationally from our manufacturing facility in Ireland.

Our products are recommended by leading architects, engineers, and construction professionals. The Passive Sills product range is used extensively by construction developers, building firms, and Local Authorities in private and social public housing, as well as in commercial developments.

For home energy efficiency improvements, whether you are self-building or a small contractor, your project will be future-proofed when you include Passive Sills products.

Meet the team

Patrick Beausang

CEO and Founder of Passive Sills

Aileen Beausang

CFO and Project Manager

Conor O’Shaughnessy

Sales and Marketing

Sophie Carey

Accounts Administrator

Henrietta Szemmelroth

Sales Administrator

Testimonials

The team at Passive Sills are great! They are always so willing to help and do as much as they can to accommodate any unusual orders and requests. They are my first port of call when I need passive window sills or oversills for my projects!

John Skehan Elite Insulation

I was really impressed with the level of attention and service I received from the team at Passive Sills considering I am a self builder and not a large construction company. They were very understanding and supportive all through the ordering and supply process. I am delighted with my window sills - you would never think that they weren’t real granite! Thank you all...

Niall Christle Self-builder

Fantastic service. Martin, Janice and Courtney were super helpful, even when I changed my delivery date request. Thank you!

Bernard O'Connor Self builder

I always recommend Passive Sills’ products to my clients. Passive products are the future of the construction industry from an environmental standpoint, and are cost effective too. Their team is always on hand to help and advise, and nothing is too much trouble for them.

Eamonn Grainger Grainger Energy Solutions

We have been using Passive Sills window sills for a number of years on our building projects. The window sills are very easy to install and work with because they are much lighter than concrete and stone sills, so from a health and safety perspective they are ideal. Passive Sills are an innovative Irish company and we look forward to working with them again on future projects.

Astra Construction Construction company