Roof trusses

[Headless chicken]

Building a new house and in order to capitalise on space we’ve been given the option of 400mm centres at a cost of £1,400 more or loose roughly 2ft all round of our attic room and go for 600mm centres.
I’m swinging towards the 400’s as is the architect and builder but chippy mate says no sense just use the lost space as shelving etc and save the cash.
Thoughts?

 

[Highland Mule]

Building a new house and in order to capitalise on space we’ve been given the option of 400mm centres at a cost of £1,400 more or loose roughly 2ft all round of our attic room and go for 600mm centres.
I’m swinging towards the 400’s as is the architect and builder but chippy mate says no sense just use the lost space as shelving etc and save the cash.
Thoughts?

Work it out as £/sq ft. If less than the rest of the house, go for it.

 

[SilliamWhale]

Go 400.

 

[linga]

400
You will only fritter the £1400 away on something else

 

[bobk]

Building regs say 400 mm

 

[br jones]

Always 400 centers ,and you will gain height in the room .
Also talk to the truss designer as they can add strength in odd ways to nake the room bigger

 

[Still Farming]

400 or 600mm centres is between joists.
How can that effect head room?

The only way to increase headroom possibly is to have raised collar trusses.

 

[Wisconsonian]

If I'm understanding this correctly, "chippy mate" proposes putting shelves between the thicker trusses? Sounds like a bad idea to me, you want the attic to be as air tight as possible, and that would make an impossible envelope to seal. The warm air will flow out your attic like an open chimney, causing all sorts of problems, heat loss being only one.

 

[Still Farming]

If I'm understanding this correctly, "chippy mate" proposes putting shelves between the thicker trusses? Sounds like a bad idea to me, you want the attic to be as air tight as possible, and that would make an impossible envelope to seal. The warm air will flow out your attic like an open chimney, causing all sorts of problems, heat loss being only one.

May be "fish and Chippy", mate??

 

[Headless chicken]

If I'm understanding this correctly, "chippy mate" proposes putting shelves between the thicker trusses? Sounds like a bad idea to me, you want the attic to be as air tight as possible, and that would make an impossible envelope to seal. The warm air will flow out your attic like an open chimney, causing all sorts of problems, heat loss being only one.

as I understand it but could be wrong here timbers are bigger for 600 meaning your bringing the standing room further into the room so use the space closer to the wall to fit units etc and not worry about head height

 

[br jones]

400 or 600mm centres is between joists.
How can that effect head room?

The only way to increase headroom possibly is to have raised collar trusses.

400 or 600mm centres is between joists.
How can that effect head room?

The only way to increase headroom possibly is to have raised collar trusses.

I presume these are attic trusses ,if you sqeeze the design ie ,bigger timeber 1or 2 degrees steeper ,400 centers ,the top tie can be higher

 

[bobk]

as I understand it but could be wrong here timbers are bigger for 600 meaning your bringing the standing room further into the room so use the space closer to the wall to fit units etc and not worry about head height

Correct .

 

[Still Farming]

I presume these are attic trusses ,if you sqeeze the design ie ,bigger timeber 1or 2 degrees steeper ,400 centers ,the top tie can be higher

Depends if slate or tiles too

 

[Wazmos]

400 every time. No bounce in the laths and carry plasterboard better.

 

[Still Farming]

A good Truss firm down by you anyhow.

 

[Forever Fendt]

We pulled ours in to 400 but still used the trusses that were specked for 600 as they always look flimsy to me