Conservatory FENSA glazing calculations assistance required

DTDfanBoy

Morning all

I was hoping that someone out there could assist with a question I have regarding conservatories.

I'm looking to install a large glass/pvc conservatory at the rear of my house, this conservatory is secondhand. I want to extend the conservatory by adding a section of flat roof next to the house, this roof will not be glazed.

In order for building regs not to apply:



Conservatories are exempt from the other parts of the building regulations if the following apply:

• It is for domestic use only
• It is built at ground level
• It contains no sleeping accommodation
• The roof and walls are glazed with translucent or transparent materials (roof 75%, walls 50% excluding any existing walls.
• The floor area is less than 30m² (internal floor area)
• The construction of the conservatory does not affect the existing drainage system.
• The conservatory if heated; must have separate heating controls.

I was wondering if anyone knows how "The roof and walls are glazed with translucent or transparent materials (roof 75%, walls 50% excluding any existing walls." is applied.


Specifically does the 75% of roof being glazed calculation included or exclude the glazing bars from the calculation.

Thanks for any assistance anyone is able to provide :T

System

I don't understand how you are going to extend the conservatory with a flat roof - but the glazed area is the area of glazing (the area of transparent or translucent material)...

Also with the size of it you may now fall under the new neighbour consultation scheme for planning

DTDfanBoy

It looks similar to the above, which is why it will be reasonably easy to extend with a flat roof.

I will have to go down the neighbour consultation route, but thankfully I only have two neighbours, and after speaking to both they have no concerns about my plans :j

But being a true tightwad MSE'r I'm trying to keep costs down by installing a simple felt roof, as opposed to having to pay for glazing to be made:eek:

I'll also end up with an unsightly boxed in RSJ if I have to use glazing

smashingyour...

But that's not a flat roof.

Do you mean pitched or flat?

The felt roof would look !!!! in my opinion.

DTDfanBoy

The conservatory has a pitched roof, roughly the same as the one pictured above, the roof I will put in place to extend will be flat. Imagine the conservatory above pulled away from the house 1700mm, and a flat roof inserted in the gap

As the flat roof will only be seen from the bedrooms above I don't mind using a coloured felt in order to keep costs down I did consider copper until I asked my neighbour how much their roof cost :eek::eek::eek::eek:

smashingyour...

So what you are doing is a 1700mm extension onto a conservatory and you wish to avoid building regs?

Just do it properly if you ever wish to sell the house.

DTDfanBoy

You have it in one, I highly doubt I'd ever get building regs approval as there is a huge amount of glass involved, all double glazed including the roof, but I'm fairly sure it wouldn't meet the current energy saving measures required.

Being secondhand there is also the issue with getting the glazing signed off by building control, which I gather can be a huge hassle :mad:

I'm be doing everything properly, foundations, insulated slab, brick and block insulated dwarf walls etc.

I've even got a friend who's qualified sorting out wall loadings, RSJ sizing etc . There will be two brick piers going in mid span as it's a little over 7.5m wide, and I don't want to spend a fortune on steel. I'll be cladding the piers with aged oak, and wacking a bar in between them :beer:

I just don't want the expense and hassle of going down the extension route as I don't want to reduce the amount of glazing.

I may just have to bite the bullet and work out how much a couple of skylights will cost me for the flat roof :cool: