Advice on Garage Build

[Fantom]

this is sounding like it's next to your house so if you want to have it "in keeping" with the rest of the buildings I guess trusses is the way forward. If you like the idea of headroom, have a look at raised scissor and scissor tie truss designs. Doesn't give you any usable roof space but gives you extended head room.

If you can build up the gable walls to to pitch height in block or engineered brick then you could use an I beam as your top rafter, then just drop the hips down to to eaves.
World is your oyster.

in bold was sort of what I had in mind

and in keeping... na dont worry about that

 

[Maccapacca]

140 dense concrete blocks
One steel beam
Timber joists
Ply deck
Cheapest windows on Ebay
Timber opening out doors from Howdens
Three layer felt roof
Plastic fascia and gutters
Bucket of white masonry paint for the external finish

Cheapest spec I could come up with

 

[Fantom]

A flat roof will obviously be much cheaper but a pitched roof has the advantage of providing storage space. I'm very lucky to have a double garage with a picthed roof large enough to climb up on a ladder and stand in the loft space. I now use it to store all sorts of stuff and it keeps the house nice and clear.

You might also want to consider feeding power to the garage too.

I have already plumbed water, waste (yes my garage will have a loo ) and ducting for armored cable, perhaps a little presumptuous but I'm sure planning will be ok'd.

The garage is at the back of the garden so wont jump out at too many people

 

[Fantom]

140 dense concrete blocks - is that doing away with the cavity? would normal 100 blocks suffice when using a cavity?

One steel beam - is it much cheaper to build in a pillar to shorten the steel beam?

Timber joists - presuming flat roof configuration, what do you think about the high gable wall supporting the ibeam?

Ply deck - Im assuming this is only available on a flat roof? or could this replace plastic coated steel on a pitch?

Cheapest windows on Ebay - yeah good thinking, only need one window so will see what i can find

Timber opening out doors from Howdens - right on, either that or self made, second hand, whatever i can lay my hands on...

Three layer felt roof - yup

Plastic fascia and gutters - yup

Bucket of white masonry paint for the external finish - sounds good!

Cheapest spec I could come up with

Sorry for all the questions but the answers are invaluable.

Thanks!

 

[Iamzod]

We did this at my dads house, we built out own roof trusses from scratch, time consuming though!

I think ours is around the same sort of size as yours too.

 

[Iamzod]

oops, double post!

 

[Usel]

I have already plumbed water, waste (yes my garage will have a loo ) and ducting for armored cable, perhaps a little presumptuous but I'm sure planning will be ok'd.

The garage is at the back of the garden so wont jump out at too many people

You don't have planning permission yet? I have been refused before because they didn't like the idea of cars running past between the houses. Front or side would have been ok. If your in the middle of nowhere then there's probably nothing to worry about.

 

[Matt82]

140 dense concrete blocks
One steel beam
Timber joists
Ply deck
Cheapest windows on Ebay
Timber opening out doors from Howdens
Three layer felt roof
Plastic fascia and gutters
Bucket of white masonry paint for the external finish

Cheapest spec I could come up with

sounds almost exactly what im starting at the minute. went a bit OTT with foundations though. c.30 tons of soil removed, 18 inch wide and more than knee depth. 750kg of cement alone and 10t ballast wheelbarrowed in over the weekend.

 

[blueboy2001]

Do you really need it to be 7M high to the ridge?

You'll need planning permission for this and to be honest with you it looks more like an industrial building than a domestic garage to me. Planners will be instantly suspicious you want it for business purposes. I think they'll give you a hard time over it, but it depends on the scale and appearance of what's around it.

You can do 2.5M to the eaves and 4M to the ridge without permission (providing it's not within 2M of the boundary). http://www.planningportal.gov.uk/permission/commonprojects/outbuildings

 

[BF-Bert]

Adjust the sizes of the garage to give a joist length no more that 5.5m, do away with the steel beam and just make a timber flat roof.