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Hi peeps, looking for some advice regarding insulation and avoidance of condensation etc.
House is
1930s brick-brick
In Scotland so roof is a slightly different set up.
Tiles>batten (maybe counter)>sarking>rafters If there is a felt layer it would be between battens and sarking.
Looking for some advice as looking to insulate coombed ceilings and potentially the ceiling between first and attic.
Happy to be linked to a previous thread and even happier if the answer is linked to a website/publication I can read up on myself.
Our house, when moved in, didn't have any insulation at attic level. The attic has stairs and is original flooring (T&G, nailed etc basically another room without heating) and it was decided at the time easiest and quickest would be to fill between the rafters with celotex. So 100mm insulation and 50mm air gap, rafters around 150-155mm.
I've since learnt this may not have been best as the roof isn't ventilated. Sofits are lathe and render and no ventilated tiles.
Is this a potential issue?
We are now looking to do works on the first floor including atleast insulation for the coombed ceilings. Proposal was lathe and plaster down and continue with celotex down to wall, then PB or insulated PB and skim. But now concerned that this isn't a good idea due to lack of ventilation of the 50mm air gap.
We would also like to insulate between the first and attic, exact method not decided could continue with removal of lathe and plaster or some blown in. These joists are 200mm. But with some reading online I have concerns that an attic insulated above and below isn't good either.
Basically as it stands we only have 100mm PIR insulation at roof level and even then that doesn't encompass the whole roof as it's not brought down to habited rooms.
Anyone able to offer advice?
House is
1930s brick-brick
In Scotland so roof is a slightly different set up.
Tiles>batten (maybe counter)>sarking>rafters If there is a felt layer it would be between battens and sarking.
Looking for some advice as looking to insulate coombed ceilings and potentially the ceiling between first and attic.
Happy to be linked to a previous thread and even happier if the answer is linked to a website/publication I can read up on myself.
Our house, when moved in, didn't have any insulation at attic level. The attic has stairs and is original flooring (T&G, nailed etc basically another room without heating) and it was decided at the time easiest and quickest would be to fill between the rafters with celotex. So 100mm insulation and 50mm air gap, rafters around 150-155mm.
I've since learnt this may not have been best as the roof isn't ventilated. Sofits are lathe and render and no ventilated tiles.
Is this a potential issue?
We are now looking to do works on the first floor including atleast insulation for the coombed ceilings. Proposal was lathe and plaster down and continue with celotex down to wall, then PB or insulated PB and skim. But now concerned that this isn't a good idea due to lack of ventilation of the 50mm air gap.
We would also like to insulate between the first and attic, exact method not decided could continue with removal of lathe and plaster or some blown in. These joists are 200mm. But with some reading online I have concerns that an attic insulated above and below isn't good either.
Basically as it stands we only have 100mm PIR insulation at roof level and even then that doesn't encompass the whole roof as it's not brought down to habited rooms.
Anyone able to offer advice?
