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To clarify Q. Is the loft space already a room? (If not there are masses more implications than just the floor) If not it sounds like the 8 x 2 are just ceiling joists (not floor joists which need to take much more loads)(8x2 can normally span approx 4m for just floor loads - hence these...

I think the guidance has become confused. For loft conversions to 2 storey houses - The maximum distance measured along the slope of the roof to the eaves is 1.7m. (it can be less than thiis but not more) The minimum height of the bottom of the window measured vertically from the internal...

depending how its fixed the steel base might be easier to remove when you decide to pull it down and build a proper extension. :wink: Seriously - Is it a conservatory that needs building regs - if so get details of it to your BCO for approval

Theres no need to be scared of BCOs they are human and can provide a wealth of guidance - for the cost of replacing all your windows and doors the cost will be low - but only your local BC office will be able to tell you. Inevitably if you go ahead without speaking to them your neighbours...

sand as an insulator cant be very good - its seriously denser than firbre glass - the excesive weight of it cant be good for the ceiling - could it be dirt blown into the loft since day 1 of your house (dont imagine youve got a felt) If you looking for reducing your heat loss id ship out the...

6 x 2 floor joists bolted to the existing 8 x 2 joists (overlaping the bottom 100mm of the former and the top 100mm of the latter) - is this what you mean?

and a protected stair route - and insulation and ventilation to the loftroom - and suitable structural details - and sound provisions - and other stuff you need to design for

spanning 6m+ with 6 x 2 for a floor is the stuff of fairy stories (probably need something approaching 12 x 2) - its time to speak to your eng. - if hes spec'd these as supplementry to the existing floor surely hell let you know how to lapp them Sound wise if you have more solid contacts...

if the existing are fire doors then they should be replaced with similar rated fire doors. They are fire doors for a reason and if you dont understand the reason for them inthis situation then you should consult someone who does. It often depends on the layout of the rooms, travel distances...

That sounds about right, you really need professional advice to make a fair assessment of what youve got and what you woud need to bring it up to spec Escape windows are required to loft conversions as well as the protected escape route to the final outside exit - its not one or the other

I did say 'largely' - not solely - methane gas makes up a significant portion of the toilet pong gas along with nitrogen, oxygen, carbon dioxide, hydrogen and other gases. No gas should come through an aav as it dosent release it only admits

nothing except from the law and fire safety :P - but lots of people ignore these - theres a chance youll escape and another chance you wont - 'do you feel lucky punk? do ya?'

They can only be used indoors as if used outside the valve freezes and it wont work. The 'pong' is largely methane gas - not nice stuff. An air admittance valve (AAV) can only be used if it is connected to a ventilated drain - (if you have another soil stack which is ventilated to outside...

Firstly FENSA does not apply to this situation (they purely deal with replacement windows installed into existing openings). As you are having an extension built and are looking to reuse the existing window in the extension - you need to speak to your local authority building control as...

if the spots are lv then part p may be invlved

the patio should be aminimum of 2 bricks below the existing house dpc otherwise you building yourself a problem

As the pipe would crush if you put your foundation on it (leaving you with blocked drains and a cracked building) I think you have 2 options- 1. Dig the foundation to below the level of the pipe (so approx 300mm below all the shingle et al and leave the pipe running alongside the brick n'...

Do you have a felt or can you see the tiles from in the roof oilnman?

(Dutch accent ala Grolsch(?)advert)STOP! :shock: Put the BEER down! :twisted: Do you have any loft insulation? As roof ventilation wasn't really needed before we started insulating roofs as the roof tended to be a very similar temperature to the rest of the house - with insulation keeping the...

Also contact FENSA directly - the installer must issue you with a completion certificate - they should have your job on their records - providing the installer informed them as they should