Problem with loft legs

Furts

cyclonebri1 wrote: »

I'm with you Furts, I only said semi permeable as I expected some "expert" to come along and say it's permeable.


But technically it is permeable, it just takes a long while for moisture to get all the way through as you and me have found when ripping out rotten green chip roofing,


Whats happening in this case is that the moisture has been found in effect trying to permeate the boarding, next stop mould followed by rot.


All I can say is that there must be a real issue below, so (a) sort out extraction down there and (b) ensure the loftspace ventilation is in top order or you will have issues later OP

A good point. I do wonder if there can be an issue with chipboard quality. There were some ancient green boards in my garden which had been underneath pallets of materials, They were minging with wet and soil, but still surprisingly difficult to break up and dispose of. They did not want to fall apart!

Ianwzzz

Raised the chipboard up yesterday with 3 by 2 on top of the loft legs to allow an air gap. Will see how it goes over the next couple of weeks.

Ianwzzz

Went back to the job to check the chipboard last week and everything is now dry.

My advise would be to anyone using loftlegs to raise the flooring up on some 3 by 2 or something similar to leave an air gap.

emjay99

What was the gap between the top of the fibreglass and the underside of the chipboard before you added the 3 x 2 ?

Ianwzzz

emjay99 wrote: »

What was the gap between the top of the fibreglass and the underside of the chipboard before you added the 3 x 2 ?

There was no gap, the insulation filled the gap completely, like the picture on their website.

http://www.loftleg.com/index.php?page=what_is_loftleg

Davesnave

Obviously, there's a need for a [STRIKE]different [/STRIKE] better product; either the insulation itself, or some means of support that avoids condensation.

My own limited experience in this area suggests there's massive confusion, especially when it comes to laying new electrics in lofts.

Jimmy008

I have used Loft Legs on lots of loft projects and have never had a problem. Make sure that you dont block the soffit/eaves vents with insulation to maintain good air flow throughout the loft space.

Ianwzzz

Jimmy008 wrote: »

I have used Loft Legs on lots of loft projects and have never had a problem. Make sure that you dont block the soffit/eaves vents with insulation to maintain good air flow throughout the loft space.

The soffits have not been blocked and there are vents in the soffits. That still wouldn't help with air flow between the insulation and the bottom of the board because there is no space for air to flow unless you raise the board up.