Practical Boat Owner - - Practical -

Sev­eral kilo­me­tres of Silo­mar are used on each project. Silo­mar is a closed cell foam with a high de­gree of springi­ness, and avail­able in a range of di­men­sions.

Sev­eral sup­pli­ers also pro­vide acous­tic ply­wood sheets, which are re­as­sur­ingly ex­pen­sive but very ef­fec­tive, and are now be­com­ing more used widely in house­build­ing. The cen­tral fill­ing of this ply is usu­ally a dense, lead-im­preg­nated rub­ber which dead­ens sound be­tween decks.

the deck­head lin­ings of a su­pery­acht can float too. here’s a rub­ber mount­ing plate for a sus­pended ceil­ing on a 150ft Sun­seeker. note the lack of bolts hold­ing it up – a pow­er­ful ad­he­sive is used in­stead. dec­o­ra­tive pan­els will be at­tached to the grey wooden beams us­ing plas­tic clips

a cross sec­tion of a typ­i­cal float­ing floor. the ply­wood’s built-in sound bar­rier can be clearly seen, and neigh­bour­ing sheets have been joined with a re­bate to en­sure no sound gaps. the whole thing rests on a bed of blue Silo­mar foam

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