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20'x10' Prefab garage in the UK

ProjectBobcat

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Oct 13, 2011
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20'x16' Prefab garage in the UK

Hi, I've been reading threads on here and finally I can start my own. I'm a first time buyer living in England and one of the requirements when house hunting was a garage or space to build one.

I eventually decided on a house that ticked a lot of boxes but the garage was very small.

After moving in the first challenge was to level the garden, we found that around 8 tonnes of rubble and household junk had been buried within raised beds. Amongst the 'discoveries' were a smashed cast iron bath, two toilet seats, a machete and a set of false teeth.

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The plan was to remove the greenhouse and path and extend the base of the existing garage to a depth of 20ft and a width of 10ft. In the UK you can build a garage of upto this size without planning restrictions. The existing garage is made from prefab concrete panels which i will be using as I'm on a absolutely tiny budget.

The existing garage has a wasted space behind it of approximately 6ft, its not really useable for much else so I'm pushing the garage right back into this corner.

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Ive dug the foundations for the extended base by hand to save costs, ive managed to dig to a depth of between 1ft and 18inches, it was tough going as the soil is clay.

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The greenhouse already has a recently substantial base approx 3 inches lower than the intended garage floor height so I'm going to retain it, it would be a lot of extra work for me to remove it by hand.

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The greenhouse was then dismantled and went off to its new life with a family member.

Before the base was concreted, i put in some pipe to carry future electricity to the new garage

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I was intending on gathering together a few friends and borrowing a mixer to concrete the base in one day but my brother in law kindly loaned me some of the labourers from his company who, with a small mixer, laid the base in around 4 hours whilst i was at work. I think it took around 6 tonnes of concrete to do the job.

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Then it was time to actually get the materials to extend the garage, I found a suitable concrete panel garage on eBay which I bought for just over £100. Its roof unfortunately contained asbestos so the seller arranged disposal leaving me with at least enough panels to merge with my existing garage and create a larger one.

This takes us up to where I am now, Ive started to reassemble the panels, they are from a different manufacturer so some differed in height and I had to cut them down.

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I will try and update this thread as I go, the next step is to build a pair of brick pillars to support a roof.
 
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RSOllie

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Ipswich, England
this is a really intresting one and looks like you have a plan in ur head which is always a good start
i feel for you with the clearing of the garden as the last owner of mine also liked back filling with concrete rubble everywere!
are you makeing the garge door wider as well?
good luck!
 
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ProjectBobcat

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Thanks for the replies. Its actually going to be 16ft x20ft which works out at 10 panels by 8. I was getting confused with something else when I typed 10. I'm aiming to have an internal floor area of 30mtrs square which is the maximum the planning office will let me without an application.

I'm hoping for a couple more weeks of warm weather, we are renovating the house vas well so it would be really handy to have a temporary store for alot of the materials if possible.
 
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ProjectBobcat

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this is a really intresting one and looks like you have a plan in ur head which is always a good start
i feel for you with the clearing of the garden as the last owner of mine also liked back filling with concrete rubble everywere!
are you makeing the garge door wider as well?
good luck!

Thanks, if I ever see the previous owner i'll be asking where they got it all from.
Im going to leave the door at single width for the time being and use the extended section as a workshop area. I do plan to bring a car over from the farm its stored on one day for restoration but I have a set of dollys for moving it about on so it shouldn't be a problem.
 

RSOllie

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Thanks, if I ever see the previous owner i'll be asking where they got it all from.
Im going to leave the door at single width for the time being and use the extended section as a workshop area. I do plan to bring a car over from the farm its stored on one day for restoration but I have a set of dollys for moving it about on so it shouldn't be a problem.

sounds like a plan!

i reckon my previous owner had a small concrete plant in his garden as well:dunno::willy_nil
 

firecracker

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Mar 16, 2013
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Lancs UK
Glad you finally got going bobcat,(looks like you did'nt need the Bobcat:lol_hittie easy when your young and fit:thumbup: so where are you located?
 

Faiz

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Oct 22, 2013
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Uganda
This is great!
Looking forward to seeing the progress.
Low budget builds always result in plenty of innovation.
 

RSOllie

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Ipswich, England
Now thats a ridge timber! Whos now missing a tree from there garden lol?
I am lost with the pillers though, what they for?
What roof covering you going for?
 
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ProjectBobcat

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Its actually 3 sections of an old telegraph pole which was taken down in the 60's when the road outside my parents was widened, its been at the back of my parents garage since then.

The pillars are to give a bit more support to the beam, they will be a bit higher in due course but we wanted to give the cement time to set before we went any higher, it looks a bit odd at the moment as the current garage has to be moved by 2ft for permitted development. I cant go higher than 2.5metres for the same reason (within 1 metre of a boundary)so we are going to have a flat roofed garage with the front elevation being the highest point and the back being the lowest. The beam will be used to tie together the current metal roof supports. if tomorrow goes to plan then hopefully it will make more sense then.
 
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ProjectBobcat

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I'm not sure on roof covering, i thought corrugated steel but i'm concerned about condensation making everything damp.
 
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ProjectBobcat

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This will form the front wall of the garage, you should be able to see how much the current garage needs to move back by in order to line up. This maximizes both the usage of the space we have (garage tucked right into the corner) and the available floor area.
 

RSOllie

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I am understanding abit more now lol

You can get anti condensation metal roof boards nowadays so that shouldnt be a problem for you!
 

Zebedeewesty

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Thats what i'm planning on using on mine.
Its only made about 20 miles away from me but trying to get a quote off them is like trying to get blood out of a stone. Its like they don't want my money.:eyecrazy:

Its £2.76 a foot on ebay for a 39inch (1m) covering width though.
 

Cris B

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Garages have a habit of becoming cluttered... looking good though. The bulk buying of trowel mastic is a new one to me.
 
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ProjectBobcat

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Thanks for the nice comments.

I'm worried about security so I decided against any windows or extra doors, I did fit a couple of clear roof sheets but even then, im fitting security grills under them and also adding some motion sensors that will be linked to the house alarm.
 
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RSOllie

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Looks very neat mate good job!

Couple of things
The brickjointing stuff i reckon will be fine as it has alot of flex in it and is used for filling exspansion joints in walls
Also if you do pressaure wash the panels please go with ease as the pebble dash will come off and look a pig
And get a couple of small vents in the sofits if you can to allow a small air flow in the garage as that will also help condinsation

And is that a shiney XR2 i see!
 
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ProjectBobcat

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Thanks for the advice, I will put a couple of vents in. No its not an XR2, just a popular plus wearing xr2 bumpers, steel wheels and spotlights.
 

Bigbandguy

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Very impressive job on a very tight budget. I like your way of adapting materials. You have made a very functional space out of what was essentially a ruin. How has work progressed on the house?
 
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ProjectBobcat

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Thank you! The house is progressing thanks, we tried to keep it to one room at a time but with a full rewire and substantial plumbing changes, the whole place ended up in quite a mess. A new baby in the mix hasnt helped with the schedule but we're getting there.
 

ELLpolo

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May 5, 2012
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Hi, good to see another forum user from the UK.

I am working on my own Garage renovation at my first house (thread to follow soon) and am considering an external fillet to direct storm water away form my foundation.

My the foundation extends about a foot further than in should and the brick walls sit directly onto it with no membrane. In places I am getting water sitting in the corner and eventually seeping through into the garage.

I have added some really neat guttering and downspouts that direct water to the house which made a huge difference, but I'm looking for the final nail in the drainage coffin, so to speak.

Did the fillet help?

Did you use a waterproof cement?
 
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