Suddickbender
Well-known member
Has anyone had cavity wall insulation installed in a terraced house or has anyone any thoughts / Knowledge / Experience of having it installed ?
Correct. You can't stop airflow in the cavity without causing structural problems.I believe cavity’s were built to let buildings breathe and would never fill them up.
And new builds have to have it by law.And yet Conservative & Labour keep insisting our homes are cavity wall insulated, as one of their main priorities, going into the next election.
Not correctCorrect. You can't stop airflow in the cavity without causing structural problems.
Correct. Most people don't have a jar of glue as to the pros and cons of cavity wall insulation. As a rule, it's the best thing you can do, but not to be installed by charlatans.It's suitable for most properties if it's installed correctly.
And whoever mentioned air flow in a cavity is talking nonsense.
Why do you think cavities are closed? You don't want air moving around in them.
Not correct
Rubbish, the airflow ensures that the internal wall stays dry . Cavities are closed but we still have ventilation at low and high levels. If we fill the cavity it causes condensation which in turn, leads to mould forming . I have well over 40 years in the construction industry so I’ve got an idea what I’m talking about . New build houses have cavity insulation but they still have 50 MM clear air flow.It's suitable for most properties if it's installed correctly.
And whoever mentioned air flow in a cavity is talking nonsense.
Why do you think cavities are closed? You don't want air moving around in them.
Not correct
Correct. As per usual AVFTT is full of experts who know absolutely fook allIt's suitable for most properties if it's installed correctly.
And whoever mentioned air flow in a cavity is talking nonsense.
Why do you think cavities are closed? You don't want air moving around in them.
Not correct
Ever heard of drithem?? You are talking shite it has zero to do with airflow and everything to do with water not penetrating to the inner skin.Rubbish, the airflow ensures that the internal wall stays dry . Cavities are closed but we still have ventilation at low and high levels. If we fill the cavity it causes condensation which in turn, leads to mould forming . I have well over 40 years in the construction industry so I’ve got an idea what I’m talking about . New build houses have cavity insulation but they still have 50 MM clear air flow.
Ok thenEver heard of drithem?? You are talking shite it has zero to do with airflow and everything to do with water not penetrating to the inner skin.
No they don't in a lot of cases. I put an extension on my previous house 20 years ago with full fill cavity insulation.Rubbish, the airflow ensures that the internal wall stays dry . Cavities are closed but we still have ventilation at low and high levels. If we fill the cavity it causes condensation which in turn, leads to mould forming . I have well over 40 years in the construction industry so I’ve got an idea what I’m talking about . New build houses have cavity insulation but they still have 50 MM clear air flow.
When I had my cavity wall Insulation they put air bricks in also?No they don't in a lot of cases. I put an extension on my previous house 20 years ago with full fill cavity insulation.
I left that house a few months ago and not a hint of damp. Nothing to do with air flow. Why have air flow in a cavity?
I can't understand why they would put air bricks in? Unless they're at low level(?) to ventilate under your floorWhen I had my cavity wall Insulation they put air bricks in also?
Best thing I had done(free) over ten years ago my heating bill went down massively.
I now need it doing again as also had an extension(fully insulated)built last year and it was like a snow cannon going off when they knocked down the walls.
I'm still finding insulation balls now!
We are not benefits and earn above the limit to get a freebie so looking for someone to do it local.
Yep near the ground so your probably right.I can't understand why they would put air bricks in? Unless they're at low level(?) to ventilate under your floor
Good to hear though the cavity wall insulation did it's job in reducing your heating bills
Different materials when used on older houses to new builds? Different levels of standard of outside brickwork and therefore moisture transfer?Cavity insulation used to partially fill the cavity which is usually 100mm . . nowadays full fill cavity insulation is pretty standard.
How so?Classic avftt thread …quick google search then let the expertise start……
100 years ties in with the 30's to be fair.Doubt it’ll have cavity walls if it’s 100 years old
It’ll probably be 9inch solid brick.
Cavity walls were about 1930’s.
I’m a surveyor by the way There were some at that time but not many pre 1920 houses were cavity
RICS100 years ties in with the 30's to be fair.
Out of interest what kind or surveyor are you?
Me too, which discipline are you in.RICS
I worked for the Valuation Office most of my career then for Countrywide Surveyors doing Homebuyer Valuations and mortgage surveysMe too, which discipline are you in.
Worked in building control for 28 years and for last 5 set up a consultancy that does plan checking and site inspections. I also do insurance work for a loss adjuster to defend uplift claims to meet potential statutory uplift requirements.I worked for the Valuation Office most of my career then for Countrywide Surveyors doing Homebuyer Valuations and mortgage surveys
You?