… and doesn’t involve the mess and stress.
There are Cost of Double Glazing NZ alternatives, even though GD is clearly the most well known and popular option for window insulation.
Unfortunately retroﬁtting can turn out to be an expensive exercise. When retroﬁtting with double glazing the bead and opening sashes need to be replaced with new powder coated aluminium, which will be a different colour due to the original colour fading over time.
With THERMAL Glass Coat, you do not need to replace anything, not even the glass. Retroﬁtting standard double glazing also doesn’t offer the same UV protection as THERMAL Glass Coat and, is at least twice as expensive and nowhere near as quick or easy have installed.
Information that you need to know.
I read with interest the February/March 2011 BRANZ Build Magazine, page 72 headed “Supporting Heavy Windows.”
It raises a very interesting point. Coming from an industry that repairs aluminium joinery, I can understand a major problem is waiting to happen.
More and more consumers are looking at insulation which includes retrofitting with double glazing. This is going to double the weight of the glass which the frames may not be able to handle. When manufactured, it was designed for single glazing NOT double glazing and as all the corners are held together by one or sometimes two screws and a little silicone there is the potential for leaking due to the eccentric load from the heavier glazing.
As stated in the column:
“If insufficient vertical support is provided, this eccentric load from heavy windows can cause problems such as twisting of sill trimmers and window sagging, causing the joinery to leak.”
As we look more and more at the leaky home syndrome, is this another problem we do not need? Who will pay this bill when your house needs to be repaired?
Another statement reads:
“Recognising the possible problems, the Window Association of New Zealand (WANZ) markets a window sill support bar to carry the window weight back to the timber framing.”
Is this system being used with all retrofitting jobs?
Have any tests been done to show that retrofit double glazing is safe to be carried out in older joinery?
This is an issue that needs answers for the consumer!
THERMAL Glass Coat is a Cost of Double Glazing NZ Alternative where nothing is replaced, therefore this problem is not an issue.