Re: What glass for epoxy?
I've seen that post referred many times on here and it is great information. However, it is also a great example of the contradicting info I mentioned. He continually refers to using CSM and 1708 which has a CSM layer.
Depending on the job at hand, often the 3/4oz CSM stitched to the back of 1708 biax is insufficient, and 1.5oz CSM is used 1st.
The referenced stringer, transom & deck graphic has been updated to reflect that ^^^
I wouldn't consider it contradictory either, confusing perhaps if you aren't reading the details. If you use 1.5oz CSM before 1708 in EVERY instance, you aren't doing any harm anyway. Using a bit more labor to install it, a bit more money in CSM & resin, and a fairly minor amount of additional weight. Nothing problematic.
This info is based on using POLYESTER resin during the rebuild, not epoxy:
Perhaps you have saved a previous copy, you maybe reading posts prior to 2/13 or because you've read it before you aren't reading the entire text of the revised graphic.
In the details, the CSM is used to cover the entire deck being glassed, the 1st layer is applied prior to installation. The 1708 is used for the tabbing:
The transom is covered w/ CSM prior to install, and once installed is covered w/ 2 layers of 1708 (no additional CSM) for outboard transoms. I/O transoms get 4 layers of 1708 after the initial pre-installation wrap w/ CSM:
Also note the mention that using CSM 1st
is advised when layering over uneven, rough surfaces, like a fiberglass hull that's been ground.
You CAN use CSM w/ epoxy, it may not wet out clear, and it may use up more epoxy resin then you really needed to use to get the job done. At least 1 moderator uses CSM extensively w/ epoxy, w/ no problem.