The accumulation of a large number of blisters will, in turn, create a serious hull delamination. The degree of structural damage will increase as the blisters fracture and penetrate deeper into the layers of the hull.
THE SOLUTION A Touch Of Fiberglass always begins the blister repair process with a laminate profile. First, high-speed grinders remove a sample of material at selected sites. Second, depth calipers record the thickness of each layer that is removed. Third, a moisture meter determines the amount of moisture in each layer. This information determines the repair procedure, i.e. how much material has been damaged and must be removed and replaced with new material. The next step is to remove the damaged material at an appropriate depth, and the damaged material is removed evenly over the entire hull using our hydraulic peeler. A hard sanding of the hull follows this procedure. The next phase of the repair is to dry the hull. It is our opinion that the vessel must be dried to a reading of less than 10 on an Electro physics moisture meter. With a low reading, only a minimal amount of moisture is trapped in the hull and a higher degree of secondary bonding between the original resin and the new material will occur. Some hulls dry very quickly after the peeling process. Others may be force dried with propane heat alternated with moving air. If more than 80 mils of material had to be removed, the vessel will usually require a new laminate. ATF uses structural fabric for all re-laminations. This is a state of the art boatbuilding fabric which adds strength to the hull. Unlike chop strand matt, this fabric contains no WSMs. If less than 80 mils of material is removed, usually a barrier coating is all that is required. In either case, the hull is faired to original shape before the barrier coating is applied.
FAIRING AFTER LAMINATE
ATF uses a Chemical vinyl ester resin for both re-laminations and barrier coatings. This is a top of the line vinyl ester resin which is considerably more expensive than commercial v.e. resin, and has excellent moisture barrier properties. All ATF warranty barriers are applied to a thickness of 50 mils of vinyl ester resin. ATF gives a three year warranty to boats with barrier coat only, and a five year warranty with re-laminations. One coat of anti-fouling paint is included with both repair packages.