This is how it all went wrong !! Loft boarding = Condensation

There has to be airlow in the roof and also between the boards and insulation underneath.

 

See attached doc for reply

 

I know its a while since this was posted, but there will still be others that experience this problem.
Let me give you a 2014 answer to this problem.

If your going to board your loft for storage, never put plastic sheets down, plastic condensates, always build a raise floor using a sub-frame system so you can lay board on to the sub-frame not directly on to the joists, we just don't do that anymore for obvious reasons.

Removing or squashing your insulation is not the right thing to do, its their for a reason so don't remove it and don't squash it down, it decreases its efficiency considerably as it needs air flow to work.

The idea of creating a raised platform is to allow the all important air flow under the boarding and around your loft. Never completely board out your loft, just the easy to access areas or highest areas mainly the centre of your loft, keep the eaves free for air circulation.
Use a product like LoftZone StoreFloor which is a 270mm (11") three component stilt and beam system available direct for DIY or installed *

Here are some samples of how loft boarding should look..

 

Very good SPAM

 

Thank you, but its not spam, like I said before if you have nothing useful to say, say nothing at all.

 

I HAVE something to say. That looks like a real dodgy bit of kit. Looks unsafe. Far too much lost space and very expensive for the job it's needed for.

AND to come on here plugging your own business is SPAM!

 

Definition of SPAM

The word "Spam" means "Unsolicited Bulk Email".
Unsolicited means that the Recipient has not granted verifiable permission for the message to be sent. Bulk means that the message is sent as part of a larger collection of messages, all having substantively identical content.

Please before you type, read, understand, educate yourself before having a go a people businesses when you simply have no idea.

And for your information, the products are tested to British standards, supported by carbon trust and won invention of the year at the Ideal home exhibition in earl's court.
It gains space, not loses it as it allows you to board over insulation rather than removing it or squashing it which is seen as unprofessional, therefore you cannot have boarding with tall insulation.
There is very little difference in comparison to wood as its also labour saving to.

For my expert advice I am quite entitled to use my own business as an example, even though the products are not mine!!