Hi all
trying to use the endless downtime waiting for planning to pick my cladding and windows etc — please excuse my ramblings but appreciate if anyone has been through similar thoughts
We are going for a contemporary look with thin vertical Timber cladding and likely grey or black windows. My architect has steered me towards aluminum windows and Smart Aluminium being his recommendation so I’ve started looking here first, They do indeed have many profiles and in particular a flush version ( Alitherm 500) we like).
https://www.smartsystems.co.uk/product/508/alitherm-500
Trouble is many of them are listed as having frame suggested UValues of 1.3-1.6. I’m aware the building regds enforce 1.4 as the minimum - The window sales person has mentioned this overall UValue can’t be brought down seemingly to any value required depending on the glass. I’m a little suspicious here but does anyone know what kind of calculation is used to calc overall window UValue once you add glass of a certain spec.
Now I’ve read many posts and alu clad Timber seems to be many people’s choice and I’m guessing this is for the improved UValues.which I see are down into the 0.5-0.8 area. I’ve many more to look at (Rationel, Velfac,, etc) but From my initial look at idealCombi the sighlines do seem reasonable (53mm) which fit my modern brief but the frame depth seems huge ( I guess the strength comes from somewhere). We not fans of the dual colorings so the view of the windows at a slight angle shows the all important frame depth which is putting me off
I’m also becoming increasingly aware when doing a self build how you can get carried away trying to hit and beat numbers - yes keen to be energy efficient and have no SAP/BC issues but also aware how good is good enough. Seems pointless to spend a fortune if the payback is a few pounds a year or repayment beyond my lifetime (Sorry Environment I’m trying but there is a limit) - Appreciate any thoughts
thanks
Dan