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Why would 300mm pumped cavity not meet the building regs? Have been advised that its far better than a 150mm pumped cavity and insulated plasterboard inside.
what will the overall U-value of the double glazed units be? ill presume 1.2wm2kWill opt for double glazed windows, I remain unconvinced that triple glazed are currently providing the justification for the extra investment.
agreedMay change them in the future as window technology improves. It will never be possible to change the cavity insulation though, so I will do it right now.
are you building under the 2011 part L building regs?Basically I am looking at the following.
Bungalow with Sunroom and converted attic
One Bedroom and Ensuite finished
Bathroom finished
Kitchen, Utility and Sitting Room finished. Cash and Carry Kitchen.
Will probably tile Kitchen, Hall, Sittingroom(off Kitchen) and Utility using same tile
Pine Stairs fitted to Attic.
Pine Doors
Rooms like the second sitting room, Additional Bedrooms and Office will not be touched.
+1Im not going to guesstimate an answer to the cost question (sorry),
+1
have you heard of these guys
Im not going to guesstimate an answer to the cost question (sorry), but i will take the liberty to harp on a bit about the triple glazing:
The primary advantage of triple glazing is that it will be a few degrees warmer on the inner face than double glazing. This has a considerable effect on the comfort in a room (esp if you plan to hang around near largish areas of glazing) and could well mean that you feel happy to turn down your heating by a notch, as opposed to up by a notch when you feel the 'shiver' effect of being near a cold surface.
On the heating, you are mixing a constant low heat source (heat pump) with a sudden high heat source (stove). Please make sure that everyone (architect, plumber, yourself) is clear how these two sources will work together in order to maximise efficiency.
www.studioplustwo.com
+1
have you heard of these guys or you get your architect to prepare tender drawings & a scope of work and go ask several builders for an accurate quote?
your 'professionals' are not explaining this very well!!Unfortunately any professionals I have spoken to have indicated that triple glazing shuts out a higher proportion of passive solar gain. Put it like this, the curtains are closed by night which forms a semi barrier to heat loss anyway. I would prefer to gain by day all year around, and take my chances in winter time with double glazed.
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