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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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Cavity wall insulation, airbricks etc
I've been thinking about cavity wall insulation for our 1930's semi
and it recently occurred to me that it might be a bit of a problem because of our airbricks and suspended floors. Currently the whole side-wall (ie. not front/back wall) cavity is ventilated with grilles at each end of the top of the main side wall and is open into the loft (at least, the shower cable from the CU runs up the cavity and into the loft so I assume it's open). This wall is cold to the touch on the inside normally. Maybe its down to draughts rather than just conduction etc. Filling up the cavity with fluff stuff would stop this ventilation (though I guess the ventilation is also causing a lot of heat loss). If this is the case, should I be able to remove/block up these grilles and top of cavity in loft and see less heat loss from these walls. Currently the shower extractor fan vents out one of these grilles anyway. Are there any implications with doing this? I'm aware that I need to make sure that the floor space is adequately ventilated - I know can't block these ones up. So how can cavity insulation be added without blocking these vents? Thanks David |
#2
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Cavity wall insulation, airbricks etc
Cavitys are not designed to need ventilation,I would have thought that the
vents were put in to vent a room and have been covered up on the inside,vents below dpc are to vent underfloor |
#4
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Cavity wall insulation, airbricks etc
When we had our walls done last year, they put little plastic things
in the air brick vents to keep them clear of the insulation material. Why not check with your installer? Marc (Swampie) wrote in message om... I've been thinking about cavity wall insulation for our 1930's semi and it recently occurred to me that it might be a bit of a problem because of our airbricks and suspended floors. Currently the whole side-wall (ie. not front/back wall) cavity is ventilated with grilles at each end of the top of the main side wall and is open into the loft (at least, the shower cable from the CU runs up the cavity and into the loft so I assume it's open). This wall is cold to the touch on the inside normally. Maybe its down to draughts rather than just conduction etc. Filling up the cavity with fluff stuff would stop this ventilation (though I guess the ventilation is also causing a lot of heat loss). If this is the case, should I be able to remove/block up these grilles and top of cavity in loft and see less heat loss from these walls. Currently the shower extractor fan vents out one of these grilles anyway. Are there any implications with doing this? I'm aware that I need to make sure that the floor space is adequately ventilated - I know can't block these ones up. So how can cavity insulation be added without blocking these vents? Thanks David |
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