SeaMac Aluminium Ltd

For 20+yrs SeaMac has specialised in the manufacture of high quality custom made Marine Aluminium Windows and Doors for both leisure and commercial sea going vessels. 


SeaMac windows are custom built to your size and shape. We offer a variety of frame types in slidingfixed and awning windows. We also manufacture access doorscommercial doorsengine room doorscupboard doors and we can even help you with new joinery for your motor home. We have also been known to adapt and alter existing profiles to meet special needs…

About Us

Previously known as Northland Aluminium Boat Windows or Nortal Boat Windows or “those boat windows made up north”, David & Janet MacInnes purchased the company in September 1994. 

First task at hand was to find a new name! To give the product a handle which would stick and become known throughout the industry. After much research and many discussions someone said to me “If you want a decent window, go and see Mac”. That had a nice ring to it, and the name stuck… SeaMac!

SeaMac today is an international brand known for our high quality, attention to detail, and reliable service, by boat builders and naval architects alike.  

David has over 40yrs of experience in the aluminium joinery business, starting his career in domestic joinery, before moving his expertise over into the marine industry a few years prior to purchasing SeaMac. 

SeaMac is a family owned and run company, with family values. 

David has spent many years perfecting his joinery for the harsh marine environment, ensuring that only the hardiest products and techniques are used in the assembly of a SeaMac Marine Window or Doors. 


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