Yachting Monthly guidelines for installing marine engine soundproofing

Duncan Kent’s full report on how to choose the best marine engine soundproofing for your yacht, can be read in the June 2014 issue of Yachting Monthly.

Guidelines on installing marine engine soundproofing:
Foil/cloth and hard barrier soundproofing is best cut with a sharp modelling knife – but it’s easier and neater to cut the foam using

a serrated blade. Thinner sheets cut well with good scissors.

Self-adhesive sheets are easy to peel

and attach, but you must position it correctly first time. Plain-backed types

require spray or brushed contact adhesives – the latter being more controllable

in tight spaces. Mechanical fixings should be added to all horizontal upper

surfaces.

Suppliers advise that all joints are covered

using special joining tape to avoid ‘leakage’. Self-adhesive foil tape

works excellently on foil-covered material, but white plastic tape

from Vetus will peeled off easily.

Ideally, soundproofed bulkheads should

totally encase the engine area, separate from any tanks, which can resonate –

amplifying the sound. Engine noise can ‘flow’ along the bilges, so where

possible bulkheads should continue down to the hull, leaving only limber holes

for bilge water.

Remember to provide enough airflow for

combustion. Open air holes will ruin the insulation, but a simple baffle will stop most of the noise escaping.

Finally, all cables and pipes should pass

through snug-fitting rubber grommets, while any covers or side panels should

fit snugly with a noise-tight seal.