Methacrylate window sticked at fiberglass frame

[mikels]

It is not the best, I know.
But, by several reasons, I "should" stick the curved methacrylate shape of window directly with a new rigid frame of fiberglass/polyester.
I suppose the rigidity, for not break.
But, know you if it is any other problem with this interface methacrylate-fiberglass? (methacrylate 8 mm., 52 cm x47 cm, encircled by rigid fiberglass hull, fiber frame 8 mm. layed on 8 cm at all sides on methacrylate)
It will break?
Thanks (and excuses)
Mikel

[Palmer]

Frameless house windows are pretty common in larger custom yachts. Those I've seen have been tempered monolithic glass with a ceramic frit around the perimeter glued in with poylurethane adhesives. Pretty much like a car windshield. It works well and gives a nice clean appearance. Methacrylate would probably work as well or better. But I've never seen these in hulls and don't think I'd do it.

[gonzo]

I understand you have a frame around the window, so it is sandwiched between the hull and it. It may or may not break depending on how the hull flexes and if it will impact docks or other hard objects. Can you use thick foam seals?

[mikels]

Originally Posted by gonzo

I understand you have a frame around the window, so it is sandwiched between the hull and it. It may or may not break depending on how the hull flexes and if it will impact docks or other hard objects. Can you use thick foam seals?

Thanks, Gonzo.
I suppose (I risk) not flexion of hull shape around the methacrylate (the hull is very hard: I have reinforced it for that).
Not high risk of impact.
I be in doubt on interaction of possible differences of expansion-contraction between methacrylate and fiberglass (weakening?) wich are sticked, without these thick foam seals (by construction-maintenance problems and leakproof requirements).
Mikel

[gonzo]

Ask your local provider for a caulk that will adhere to both surfaces.

[mikels]

Thanks
Mikel

[spoedvraat]

Hi Mikels,

Just to repeat what has already been said, the expansion of the acrylic is a lot more than one expects, so be sure to leave enough room between acrylic and frame, into which the window can expand. Sikaflex has a manula which shows how to do it, if I remember correctly.

[mikels]

Thanks.
I am reading now the Manual at the Web of Sika. It is very clear.
Regards
Mikel