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AuthorMessage
Sheilatite
Sheilatite

Posted: Sat Dec 31, 2011 4:51pm

Post Subject: Insulation

we are having a narrow boat built and it will be spray foamed insulated. would it be wise to insulate the floor, is so with what

Tony-B
Tony-B

Posted: Sun Jan 01, 2012 8:25am

Post Subject: Insulation

How tall are you and any others who will use the boat regularly? You certainly should not insulate the bottom of the boat because water from a variety of sources tends to collect under the floor so the last thing you want is damp trapped behind insulation and next to the steel bottom. This means you will have to move the insulation up and also ensure an air-gap is left above the ballast to help allow any damp to dry out. This means the insulation will have to go above the floor bearers and if the size and pitch of the bearers are insufficient you may have to add more supporting structure for the insulation. IF that plus 50mm of suitable sheet insulation like a foiled Kingspan or Celotex type product, plus the thickness of the floor boards allows sufficient head room then the latest reports I have seen suggests it makes a difference but you must have that air-gap above the ballast and try to organise a through bilge draft. Tony Brooks

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