roof overhauling?

cyclonebri1

Why on earth is a roof, the lid on a cold space, looked upon as a thermal element?, bonkers, you are supposed to have as much air flow as possible, the roof is simply to keep the rain out not the heat in:mad::mad::mad:

orrery

cyclonebri1 wrote: »

Why on earth is a roof, the lid on a cold space, looked upon as a thermal element?, bonkers, you are supposed to have as much air flow as possible, the roof is simply to keep the rain out not the heat in:mad::mad::mad:

Yep. The really stupid thing is that the Building Control people advised me that, if I can't add further insulation to the loft floor (it is boarded and used as storage) then I could add to the insulation overhead, under the tiles. As you say - this would simply add insulation above a ventilated area and would achieve nothing - but at least they could tick the box and give me a certificate.

tony6403

orrery wrote: »

Yep. The really stupid thing is that the Building Control people advised me that, if I can't add further insulation to the loft floor (it is boarded and used as storage) then I could add to the insulation overhead, under the tiles. As you say - this would simply add insulation above a ventilated area and would achieve nothing - but at least they could tick the box and give me a certificate.

It doesn't work like that. The ventilation would take place above the insulation. Example below

cyclonebri1

tony6403 wrote: »

It doesn't work like that. The ventilation would take place above the insulation. Example below

So you would then be making the loft space a warm room, rather than a cold room???????????

link not working BTW

orrery

cyclonebri1 wrote: »

So you would then be making the loft space a warm room, rather than a cold room???????????

Effectively, at the expense of having to raise the roof to install the insulation. Who dreams up these regulations?

tony6403

cyclonebri1 wrote: »

So you would then be making the loft space a warm room, rather than a cold room???????????

link not working BTW

Yes it would trap the heat which would be otherwise lost to the outside and this in turn would reduce the amount of warm air rising from the rooms below.

BigCharlie

If this is just a repair job--cracked tiles, missing tiles, split valleys, then you aren't replacing/renovating/changing anything. It will need scaffolding; but that is not expensive, last year I paid £750 for a two-level all round job on a large Victorian detached house, the top level boards at 21feet, with a 'phone when your done, lad, then we'll take it down' time scale. But if the roof needs re-battening, and felting, then you'll get bogged down with ventilation and insulation regulations. K.I.S.S. if possible.
One thought, is a loft 'a conditioned internal space'? I think this is a reg. for roofs like those in Wickes or Sainsbury's where the whole floor area is exposed to the roof!

System

orrery - do it in four different jobs - 25% of the area at a time!
totally ludicrous if they want you to insulate a cold roof because you want to replace tiles like for like

orrery

the_r_sole wrote: »

orrery - do it in four different jobs - 25% of the area at a time!
totally ludicrous if they want you to insulate a cold roof because you want to replace tiles like for like

It had been suggested! It is ironic, because I had gone out of my way to improve the insulation in the roof, before flooring it. The flooring must make a significant improvement as it effectively stops the air movement around the insulation (although I've removed the insulation from under the water tanks to stop them freezing, which I'd still need to do with improved insulation). I've also made significant improvements with cavity wall insulation, full double glazing, replaced lighting with energy saving (early on, even when the bulbs were £30 each) and more recently with LED lighting, added solar PV generation....

It isn't as though I'm not doing my bit for the environment!