He's a great guy C/Phillips... seriously.
Roughcaster.
Roughcaster.
Insulating rafters
- Thread starter cooperphilip
- Start date
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Got another bit of a problem. Just found out that the tile on my roof they dont make anymore. Are there any company that put vents in the tiles I have already got. Or even better make new tile out of moulds ?
aw shucks rough cheers.
you can vent a roof space using a proprietary pitched lead slate, a short length of 110plastic pipe and a plastic mushroom cowl.
clicky
Just read the thread and I have a similar problem. Rafters are only 75mm deep But its a converted loft which I am trying to correct so want to keep as much head space as possible.
Will a 25mm gap be sufficient for air flow if I fill with 50mm insulation? How large does the gap at the eaves need to be?
Will a 25mm gap be sufficient for air flow if I fill with 50mm insulation? How large does the gap at the eaves need to be?
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Ok I have insulated my rafter's today. And I know I ask the question over a month ago but i went to Thailand for a month lol. I friction fitted the celotex between the rafters as advised and have got the foil back plaster boards to go up tomorrow. Where I friction fitted the celotex on some of the rafters I got a little gap. Is this ok or should I fill with expanding foam ?
Also I have just read that where the rafters spa's are as there is no insulation on them, you can get condensation there. Is this true ?
Also the brick walls in the loft what divide the house, I have studded them out and insulated them with lagging. I am then using standard plater board on these. Do I need to use a vapour barrier here ?
Also I have just read that where the rafters spa's are as there is no insulation on them, you can get condensation there. Is this true ?
Also the brick walls in the loft what divide the house, I have studded them out and insulated them with lagging. I am then using standard plater board on these. Do I need to use a vapour barrier here ?
Filling with foam is a good idea in my books and provides a more robust finish.cooperphilip said:
True. It is known as cold bridging and is remedied by underdrawing the rafters with insulation.
It wouldn't do any harm.
Ok I am going to fill the gaps with foam.
I have just got back from b n q not long ago to get my polythene vapour barrier for the studs walls tomorrow.
When you say underdrawing the rafters do you mean put more insulation over the top of the other insulation as well as the rafters ?
I have just got back from b n q not long ago to get my polythene vapour barrier for the studs walls tomorrow.
When you say underdrawing the rafters do you mean put more insulation over the top of the other insulation as well as the rafters ?
Underdraw, means to fix insulation across the internal face of the rafters as well as between.
B
bcsurveyor
just out of interest, did you run your proposals past your local authority building control office? works such as these require Building Regulations approval, failure to obtain it can carry a hefty fine, and even if you escape that, you will have major problems when you come to sell/re-mortgage the property!
No I have not submitted any plans as have read that is ok as it is only going to be used as a storage room. Is this correct ?
ok can I just run through what I have done to make sure I have done nothing wrong.
It is strictly going to be used for storage.
My floor joist are 3 x 2 with 8 x 2 floor boards screwed to them.
I have had a Velux window fitted.
My rafters are 3 x 2 which I insulated with 50 mm Celotex, leaving a 25 mm airflow gap behind the insulation.
I have fitted a light up there.
Last thing left to do is plaster board with duplex boards and skim.
I have had no inspectors or anything signed off as read I dont need to as it is going to be strictly for storage.
Are there any problems now or can any arise when I come to sell my house ?
It is strictly going to be used for storage.
My floor joist are 3 x 2 with 8 x 2 floor boards screwed to them.
I have had a Velux window fitted.
My rafters are 3 x 2 which I insulated with 50 mm Celotex, leaving a 25 mm airflow gap behind the insulation.
I have fitted a light up there.
Last thing left to do is plaster board with duplex boards and skim.
I have had no inspectors or anything signed off as read I dont need to as it is going to be strictly for storage.
Are there any problems now or can any arise when I come to sell my house ?
You don't happen to have a staircase up to the loft do you?
No just a new drop down hatch and fitted loft ladder.
B
bcsurveyor
Despite what noseall says, that is not correct. Building Control will look at what the room could potentially be used for, not what you say it is being used for. For example, say you sell the property, the new owner thinks "this is a nice little loft room, ill make this my daughters bedroom" the daughter then burns to death when a fire occurs because adequate means of warning and escape have not been allowed for. I myself work in the building control proffesion, and we have plenty of people who claim to be doing work to their loft for 'storage' purposes. Most Building Control surveyors are not daft, and know exactly what the deal is with this kind of work and usually advise people accordingly. Just dont be suprised when you come to sell your property if your solicitor starts asking arkward questions about your loft 'storeroom' and requesting copies of Building Regulations approvals!!!
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