Roof

Cormac Regan · Posts: 18

Hi

Does it really matter if you show a roof as being pitched as long as the flat roof U-value is the same as a pitched roof?
The reason I ask is that I am working on a building which is part curved with a courtyard and trying to get the pitch roof shown is a real bitch, if possible.
See attached plan.

Regards

Cormac

Andrew Bairstow · Site Admin Posts: 415 Location: Birmingham, UK

Cormac
If it's a cold roof (insulated at ceiling below) then certainly it will make no difference. If it's a warm roof (ceiling and insulation absent) and pitch > 10deg then strictly speaking it should be modelled as a pitched roof. However for a low pitch then it probably makes little difference. The properties of the notional and reference pitched roofs are the same as the flat roof so it's probably the difference in area which will make the difference.
If you need some help drawing the roof then let me know. I appreciate that some roofs can be too complex to draw.
Regards
Andrew

greendeal · Posts: 4

(@Andrew Bairstow)

I am having serious problem trying to draw a fairly complex roof element of my plan. Please can you advise how I can add a open courtyard area in the centre to this??

Any help would be much appreciated.

Thanks

Mai (Green Deal)

Andrew Bairstow · Site Admin Posts: 415 Location: Birmingham, UK

Mai
Does your roof/courtyard look like the attached image?
You'd be best to draw in the courtyard first (at block level using tool next to 'draw partition'). Use construction lines to help position. Then draw the roofs as outline blocks and extrusions from a vertical plane (multiple pitched roof forms can be problematic but by all means try). Then you will have to cut each of the roofs by selecting the appropriate plan of a roof at right angles to it. Make sure that no 'internal roof' remains before converting the block to a building block.
Regards
Andrew

greendeal · Posts: 4

OMG that's amazing!!!

Yes, very similar and includes more complex gable ends. But that's a massive help and so much appreciated after an entire evening of tearing my hair out!

I'll give it a go right now. Thanks so much again!

Regards

Mai

greendeal · Posts: 4

(@Andrew Bairstow)

Hi

I have another query -

I have separated the property into various zones on ground level and added the roof to the whole building. I was wondering if you can shed any light on how I can identify the surface area of the pitched roof over individual zones? Currently, each zone displays a 'flat roof element' (refers to a ceiling) - is there a way to change this to incorporate the roof area above?

This info is required for a commercial EPC.

Many thanks

Mai

Andrew Bairstow · Site Admin Posts: 415 Location: Birmingham, UK

You'd have to divide the roof up with partitions to match the spaces below (should see drawing guidelines at roof block level: these correspond to their position in the block below). You'll have to add up the individual areas yourself.
Andrew

greendeal · Posts: 4

Many thanks!

Your time and assistance today has been much appreciated! Smile

Rgds

Mai

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