ventilation which would you recommend?

  • Thread starter weekend warrior
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most people use upvc board,that white plastic stuff used by roofers and window fitters,and can be got in small amounts or offcuts off these guys. the method I use is to clean and sand the edge of the hole,then stick a layer of sealing strip Magnum Motorhomes - Viewing Product: .then cut lengths of the plastic board and use them to fill the corrugations.then another layer of tape. then a bead of this mastic Magnum Motorhomes - Viewing Product: then put the vent in. don't use silicone !
 
well guys thanks a million for the replies!

im going to go ahead and fit my rooflight and a mushroom vent with a 12v fan to use as an extra extractor when cooking and the like, all your comments have been invaluable and to be honest i wasnt expecting so many!
so thanks all, a top bunch of guys! :camper:

PS. i will post up some pics of the fitting to help other users out :have fun:
 
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sasquatch said:
I had a couple of these fitted to a narrow boat saved a lot of hassle
solar roof vent | eBay
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I have one of these solar vents fitted along with a 400x400 roof vent. It's not quite enough to vent the van when there's two of us sleeping and breathing out condensation.

The solar vent fits between the corrugations on my Transit roof and was consequently very easy to fit with a circular frame (made with my router and a paint tin as a template) and a tube of Sikaflex. It's withstood the recent rains without serious incident - just a bit of splash when I've driven off with a flood of water on the roof. Transits seem to suffer from water lying on the roof.

The 400 x 400 vent was fitted by a local firm, Apollo Motorhomes, and is as described above - wooden frame and Sikaflex. The Sikaflex is fiercely expensive of course.

I'm quite a fan of expanding foam since my mate raised a wrecked boat from the mud, filled in the gaps in the leaky hull with it, and then towed the boat thirty miles down the coast behind his tug. It kept the boat afloat for a year in its berth. I'm not sure of its mechanical properties long term but it's way cheaper than Sikaflex.

I might put an additional vent in or a second solar extractor but I'm going to need something.

Johnny A
 
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