Co down man
Member
Currently building a lean too beef house slatted feed area with lieback. Going to put on fibre cement roof shoud I space it or not??
-
Welcome to The Farming Forum!
As part of this update, we have made a change to the login and registration process. If you are experiences any problems, please email [email protected] with the details so we can resolve any issues.
Fibre cement roof to space or not?
- Thread starter Co down man
- Start date
Tarw Coch
Member
- Location
- Bottom of Wats Dyke
By space it I presume you mean leave a small gap between each sheet. I have one she'd done like this, the sheets are put on upside down as if put on the right way up the outside edges are facing down .
However even when put on upside down the outside edges only form a small channel for rain water, as time goes by and moss builds up on the roof this Chanel can't cope with the flow of water so you tend to get water coming in.
Personally I wouldn't do it again, if I was putting a lean to up and was concerned about ventilation I would put a dog leg on the top of the lean to so that you leave about a foot gap between the shed and lean to so that the lean to starts higher than the shed its coming off.
However even when put on upside down the outside edges only form a small channel for rain water, as time goes by and moss builds up on the roof this Chanel can't cope with the flow of water so you tend to get water coming in.
Personally I wouldn't do it again, if I was putting a lean to up and was concerned about ventilation I would put a dog leg on the top of the lean to so that you leave about a foot gap between the shed and lean to so that the lean to starts higher than the shed its coming off.
pine_guy
Member
- Location
- North Cumbria
Think you can buy special sheets, I think @Beef farmer has some?
Got spaced roofs on most livestock sheds, when there is stock in the shed then no rain I'll come in. Great for ventilation
Tarw Coch
Member
- Location
- Bottom of Wats Dyke
How long have you had them? Mine was good to start with but let's more water in now that moss has built up.
Some of them over 10 years. There's no moss growing on any of our roofs. Plenty of starling sh1t tho.
Tarw Coch
Member
- Location
- Bottom of Wats Dyke
Mine would be about 25 years now, it's only in recent years I've noticed a problem.
I thought that they were normal sheets that had the sides sawn off? Uncle has them on one shed and he likes them, when we did ours we just put a proper vent down the ridge. If it ever needed converting to dry storage you could simply fit standard ridges. His has more even light than ours, I prefer the chimney effect of ours.
Forever Fendt
Member
- Location
- Derbyshire
Its because the sheets are upside down to form a water channel with what would be the overlap, the correct way to do a spaced roof is buy 'cut sheets' the overlaps are trimed of at the factory to allow the sheets to be fitted
the right way up, the underside is not so smooth as the weather side and will allow more build up of debris
Tarw Coch
Member
- Location
- Bottom of Wats Dyke
In other words mines been done on the cheap.
Although funnily enough the shed builder insisted that there was no way I'd get planning with a bog standard fibre cement roof so I ended up paying an extra £1000 to have them factory painted on what should be the underside.
Must admit id never heard of having sheets trimmed for this reason which no doubt adds to cost as there is extra work trimming as well as more sheets needed.
Forever Fendt
Member
- Location
- Derbyshire
Not really on the cheap, i have done loads like this but never painted any that were upside down as i don't think it would be that successful on the dimpled underside and if you have had 25 years out of it now i don't think its doing to bad, i prefer to vent down the ridge rather than the roof slope there are option to increase roof pitch and open ridge to gain plenty of air movement