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Airtight building costs
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08-10-2010 4:44pm#1
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Very true Galwaytt.........I suppose my statment was a bit flippant.....
Yes you have to meet airtightness regulations, and your fireplace/wall vents etc will be sealed for the test..........
but does it make sense to spend 4000 on getting airtightness a then having open fireplaces?
The OP asked was 11k good price for HRV and airtightness........my statement is still true.............it might get you to meet your regulation standards.....but if you have open fireplaces thats all it will do and it will be 11k that could be spent on something else
Ho harm, no foul, it's all good
I think OP is in the unfortunate position of having to deal with this now, rather than before he started the build, when he'd have had more choices vis-a-vis materials to build from, and this question could have been addressed more effectively then.
But, he is where he is, and ignoring the money for a second, I'd be afraid that NOT using airtightness materials now would leave him with a very poor house on that front..........Ode To The Motorist
“And my existence, while grotesque and incomprehensible to you, generates funds to the exchequer. You don't want to acknowledge that as truth because, deep down in places you don't talk about at the Green Party, you want me on that road, you need me on that road. We use words like freedom, enjoyment, sport and community. We use these words as the backbone of a life spent instilling those values in our families and loved ones. You use them as a punch line. I have neither the time nor the inclination to explain myself to a man who rises and sleeps under the tax revenue and the very freedom to spend it that I provide, and then questions the manner in which I provide it. I would rather you just said "thank you" and went on your way. Otherwise I suggest you pick up a bus pass and get the ********* ********* off the road”
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I'm at a similar stage in my build. Due to cost we are not putting in a MHRV system but had hoped to put an air tight membrane in the attic, windows etc. My worry is that because we have no MHRV we have to put in traditional vents, are we then wasting our money on the air tight membrane or would we still see a benefit?
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bluemountainz wrote: »I'm at a similar stage in my build. Due to cost we are not putting in a MHRV system but had hoped to put an air tight membrane in the attic, windows etc. My worry is that because we have no MHRV we have to put in traditional vents, are we then wasting our money on the air tight membrane or would we still see a benefit?
I don't know your situation, obviously, but €3500 - €4000, over the LIFETIME of a building, isn't a lot, imho. And it's not something you can put in, later.....imho, the quality of the building is better. It has nothing to do with the 'heat recovery' part of it, but rather, the 'managed' ventilation. What you want, need, where you want/need it.
Just my 0.02Ode To The Motorist
“And my existence, while grotesque and incomprehensible to you, generates funds to the exchequer. You don't want to acknowledge that as truth because, deep down in places you don't talk about at the Green Party, you want me on that road, you need me on that road. We use words like freedom, enjoyment, sport and community. We use these words as the backbone of a life spent instilling those values in our families and loved ones. You use them as a punch line. I have neither the time nor the inclination to explain myself to a man who rises and sleeps under the tax revenue and the very freedom to spend it that I provide, and then questions the manner in which I provide it. I would rather you just said "thank you" and went on your way. Otherwise I suggest you pick up a bus pass and get the ********* ********* off the road”
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bluemountainz wrote: »I'm at a similar stage in my build. Due to cost we are not putting in a MHRV system but had hoped to put an air tight membrane in the attic, windows etc. My worry is that because we have no MHRV we have to put in traditional vents, are we then wasting our money on the air tight membrane or would we still see a benefit?
if you come down bellow 5 air changes an hour under current building regulations you will have either have mhrv or double the size of your wall vents so i would recommend aiming for 5ac/hr this can easily be done with plaster finish just sealing the joints between different building fabrics and making sure your plasters plaster right down to the floor.0
