Hi, I have recently got planning permission for a single storey extenstion off the existing kitchen. We want to make it a continuation of the kitchen / breakfast room, as it is at the rear of the house and backs onto the neighbours we thought no windows we will just go for french doors to the side into garden and a glass panelled roof. We are now struggling to get the glass to conform and acheive required U values, roof dimentions approx 8.5 meters wide and length of pitch approx 4meters eacg panel would be about 600mm wide ? Can we use triple glazed argon filled glass if so where to source it and get required data. Would appreciate any comments regards gary.

I can't see that you could possibly get a glazed roof to conform. Your roof should achieve 0.16. Super-fan-dabby-dozie triple-glazed-argon-filled-with-knobs-on may achieve a little more than 1.0 if the frame does not let you down (it may).

Can someone else comment - is there a loophole I have missed? Even if there is, I'd advise don't do it. Veluxes yes - complete glass roof, no!

avoid an all glass roof, and just strategically place well proportioned roof lights. these are available in triple glazing.

then you actually have some roof as well, which you can insulate to the hilt.
all glass will be quite a glare, and if you end up having blinds across it, it is achieving nothing except heat loss.

It is a bit of a misnomer to use super efficient materials to achieve average results, rather than using super efficient materials to achieve efficient results (that can still be aesthetically stunning)

I have whispered you a manufacturer that i used

I intend to build a Rear Porch which I understand can be 3mtrs long plus other dimensions which I will not exceed.

I am wanting to build something that has a height of 8.5ft or 2600 next to the old window of middle room (terrace house) now a door.
That slopes down to 7ft or 2130, it will be a maximum of 4.5ft or 1360 wide.

can anyone advise me of possible designs for such a building, I have acquired the timber to make the frame but am I correct in thinking to comply with building regs It will need to be fully insulated in order to have a couple of velux's on roof and a glazed door.

What sort of floor will it need I was thinking of placing insulted board on top of the concrete slabs that form the existing path.

look forward to any reply

arnold

With such a small footprint, it seems a bit awkward to shoe horn a couple of velux's into the roof. Would a couple of windows not suffice, thereby getting enough light, simplifying the roof construction and significantly improving the thermal performance.

Hello there,

I am planning to cove an existing pool to link to seperate buildings. This ovrly large corridor will link a living area to a bedroom area. Traditioanly pool coverings are made of glass so as to create the greenhouse effect and help heat the pool.

I am wonering if my logic is right in thinking that if i have proper exterior doors that join this 'cooridor to the two seperate areas would they in winter benefit from daytime heating by this greenhouse? I have heard of people using their conservatories as a winter 'solar gain' collector during the day and then closing them off at night.

Any thoughts and comments appreciated.

Exterior grade doors might be a requirement of the Building Regs. Otherwise it might be treated as a habitable room and you would have to meet part L. That's tricky or impossible with a lot of glass. Exterior grade doors may allow it to be treated as a conservatory instead.