The charity has recently built new buildings on the Lizard in Cornwall and the Mumbles near Swansea, while Bembridge on the Isle of Wight was extended and refitted. Windows were supplied by Boyland Joinery.
"We used PVC, aluminium and steel windows systems during the 80s and 90s, but have subsequently returned to the use of good quality timber windows because the other materials did not perform as well," said RNLI construction manager, Christopher Refoy.
"Our lifeboat stations have a design life of 75 years, with the requirement that only minimum maintenance is required for the first 30 years. Good quality timber windows will meet that requirement."
Boyland Joinery CEO Cliff Thrumble said the stations presented many challenges, not only in the design of such exposed windows but in the size of the frames and circular shapes, and awkward access, too.
"The Mumbles station is situated at a major tourist attraction so deliveries could only be made in the early mornings or via the sea on huge barges. There were 27 windows, the largest of which was the entrance frame measuring over 6x5m."
