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The Norfolk Broads Forum / Broads Boat Owners Q & A / Closed Cell Foam Insulation
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Posted By Discussion Topic: Closed Cell Foam Insulation

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FireDave
Nov-23-2017 @ 11:42 AM                           Permalink
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Has anyone either used the DIY spray kits or had a company do their boat? What did yo use? Cost?

I've heard some people just use closed cell rolls too that they sealed to the hull, the same material you use in sleeping roll mats as a cheaper, faster alternative. How did you seal it to the hull etc.?

Thinking of getting a spray kit for just under £300. Either FoamSeal or Touch'n Foam 200 DIY kits.


annville
Nov-23-2017 @ 12:06 PM                           Permalink
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Hi Dave The advantage with spray foam is it gets into very crack crevice and can be applied as thick as you want, round corners, edges ect, closed cell is fine but difficult to cut and shape around protrusions, wash down/clean surface first with sugar soap or degreaser, and use Bostik spray adhesive or similar to stick it on,the larger cell type which is softer is best the sleeping mats have close cell and stiffer as they have to support you when laying on them.Spray foam is the best as there are no voids or gaps anywhere to condensate.John

FireDave
Nov-23-2017 @ 2:18 PM                           Permalink
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Thanks John! Have you heard of either of those two brands before for DIY use? It's hard to find any reviews or recommended DIY spray kits...

annville
Nov-23-2017 @ 5:02 PM                           Permalink
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The DIY foam comes in small bottles similar to 3 1/2 kg 4 1/2 calor i don't know who did  mine done by a contractor from near doncaster,for a 44ftX 11"6" topsides hull engine room and all lockers was £120=00 for engine room fuel tanks plus front lockers and below front deck where water tank goes, this was extra as they quoted for saloon bed rooms and shower room,the excuse was they said they don't normally do the extra places,so he had to come back to do the extra.They charge according to how much material they used.i wanted 2" thick.not much point in arguing i did say all over but!! they don't usually do that they normally do canal boats and farmers barns and roof spaces. so  paid up and said thankyou.He did do a excellent job.His name was Andy but i have no details as boat yard organized every thing.this was 2010/11.Oh and i did have every whare spray primerd first then 2x1" tanalised wood battens on all ribes then spray foamed covered with 3mm oak faced marine ply then painted with 4 coats dulux interior eggshell varnish,very pleased with overall finish .John

FireDave
Nov-23-2017 @ 8:09 PM                           Permalink
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Wow! That is a lot of work, and what's funny is that it's showing it was all for £120=00. Haha! Now I'm presuming it should be £1,200?
I'm going to trial my own DIY effort. Not sure how you go about spraying around an exhaust pipe from my Webasto heater system, which is bolted on to the hull. It's probably not a good idea to have the foam in near contact with anything that gets very hot.
Any insulation would be better than none though, so around my appliances and sockets, I'm sure small areas of bare hull won't cause much of a problem?

annville
Nov-23-2017 @ 11:04 PM                           Permalink
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I Dave just tape around the exhaust pipe with some bubble wrap then when foam dries/hardens cut around with a knife leaving a 1" clearance. I didnt have battens in engine room or the lockers just sprayed all over and painted white.John

FireDave
Nov-24-2017 @ 10:55 AM                           Permalink
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Perfect, excited to give this a go... I've just ordered some :D

FireDave
Dec-06-2017 @ 12:42 AM                           Permalink
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Just a little update... the strip out has started and I'm making steady progress. I'm going to have to drill though a fair few screws which look to have been in and worn away over the years, which is a bit of a pain but all good fun (providing I don't remove anything that is weight bearing!) and I'm learning as I go. The problem area is removing the built in sofa (pull out double bed). Most of the cabling is tidied and I've brushed down most of the saloon hull o/s, clearing decades of cobwebs as I go!
Must admit having brushed the fibreglass I've been bloody itchy and have some how ended up with the little pests in my coat arms! Enjoyed my shower today haha!
Tomorrow, I'll have another go at removing the sofa and then will get some bubble wrap before I spray anywhere.
Here's some before (could only find some from an archive, so you get an idea), and afterwards...



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FireDave
Dec-06-2017 @ 12:43 AM                           Permalink
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After


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annville
Dec-06-2017 @ 11:07 AM                           Permalink
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Hi Dave It would be a good idea if you ran the cabling in flexible ducting you can get split ducting that will clip over wiring with out disconnecting, some foam can melt some insulation of cables, it would also make replacement or additions in the future easier,a nice coat of foam will make it a lot warmer and quieter when its done,John

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