Lean-to roof on shared beam, need advice please

Pants

Pants

Pants

Soldato
Joined
18 Oct 2002
Posts
3,164
Location
Leicester
Hey,

I’m a relatively new home owner, so apologies for the noob questions and probably incorrect terminology (and there will be more to come I’m afraid as I want to improve the car port!).

The roof is leaky on the lean-to car port. It has polycarbonate corrugated panels that have gone brittle, and the wood is a bit unsightly. I was considering replacing with flat 10mm or 16mm panels as they seem more robust and it would be easier for me in the future to build a wall on the boundary that offers a bit of separation, weather-proofing and mild soundproofing.

The current set up is 3x4” joists somewhat unevenly spaced from my house wall to the boundary, but roughly 2m apart. Then there are cross beams (purlins?) on top about 600cm apart.

I wanted to remove the purlins and add in more 3x4 joists to make them ~1m apart (as I have 2 spare from shortening the car port already). Then I can just add the flat polycarbonate roofing with snap down glazing bars attached to the joists. In my mind, if I do that and sand down the joists, that will look much cleaner, not dissimilar from my conservatory roof.

The problem is, If I want to do this, I have no idea what to do with the gutter. For one thing, it’s attached to a purlin. This odd arrangement seems to be because the posts and beans on the boundary are shared between me and my neighbour. Any ideas on options?

Comedy diagram below…

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Thanks!
 
I would be thinking about getting rid of the shared gutter (where does it drain?) and building within your boundary. It looks like it has been two friendly neighbours who both wanted some covered space.
Are you swapping out the gates for patio/french doors?

The ***** on your roof is from next door and your pitch probably not been enough to move it.

Start again
 
Yes there was a little bit about it on the survey. But nothing pointing out the shared posts etc. The DIY wiring is rightly called out!

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The gutter drains our side.

If I need to start again I'll do it rather than bodge. I'll have to ask our neighbour to cut down his roof a bit and fit his own guttering. It overlaps quite a bit:

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If I go this route, should I concrete in the gap in between the existing pad and concrete supports, then put in a spiked steel post supports?

Or concrete it then used bolted in supports?

The exiting pad is quite bowled and water can run in from the front gate, so I'd also like to level that at some point, in case I want to make this into a utility type room in the future. Do I need to care about that right now though, or address it later?

I found a better pic from before we moved in to show the floor and boundary wall...

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@Lean I've not really thought about the front gates. It could do with something more sturdy but the drive sweeps down to the gates, so would need to be levelled a bit. That's why I assume there are chunks cut out, to allow it to open!

Cheers!
 
While I decide what to do (a simple for like roof for now vs a new wall/posts in my boundary etc) what do people think about the concrete floor?

Could I fill in the dirt areas with new new concrete, and then try to screed the whole lot to make it smoother / flatter if not completely level?

I'd quite like the option of making it into a utility room plus a small toilet in the future, so I'm looking to do things in a way that will edge me closer to that goal bit by bit.

I've started to try and model how it could look...

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Acco drains connected up to your main drainage for the sloping drive or dig a decent soakaway.

I would tell nextdoor you are putting something more permanent up (That deck board joist is a nice touch). Blockwork the side wall, blockwork the gates (window, side door if needed. Most window guys have reclaimed stuff) Insulate it?. Roofing? You could use the polycarbonate again but there are other options especially if you are able to put a window where the gates are. Get an electrician in to sort the wiring out. And youll probably need a plumber mate to look at your bathroom situation.
 
Thanks for the tips so far.

The more I take down the worse the existing structure looks. I've taken it down as far as I can which is the part next to my neighbours extension. I can't go any further for now as it's his car port wall after that. Look at the state of the wood though! A 3x4 pretty much snapped as I was going.

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It's a MASSIVE improvement in light to my kitchen already so I'm happy with that at least...
 
Not yet, will try to catch him this week. He's pretty handy with DIY so might have some good suggestions to be fair.
 
Just don’t go saying ‘someone’s made a right pigs ear of this and I’m thinking of fixing…’ - just in case it was him did it for the previous owner!
 
I've spoken (briefly) to my neighbour. He suggested that he could cut the roof shorter on his side if I put a flat roof on. I mentioned the shared posts, gutter, etc but we were a bit short on time to go into it.

I'm going to tidy the area up so we can see it all properly and invite him around to have a look, as it's all covered his side.
 
So, I've lost a bit of time the past few days watching youtubers build gardens sheds, extend old concrete slabs, screed floors, and I've been thinking about how the sole plate might work with my "unique" arrangement. I'm constantly flip flopping on if I want to make it essentially habitable (garden room quality level, tweaked to be a lean to) or do the minimum to make it not leak.

Anyway, to help me continue down the rabbit hole educate myself are there any good resources I can use to learn how to do this stuff? Is there a template that people follow to give a known good build, in terms of stud spacing, what wood to use where, membranes to use, how to make sure your timber doesn't rot, etc?
 
Given it is attached to your house, you are into "bodge job or do it proper". If the former any garden room videos will do. If the latter, it is just an extension.
 
I think I'm up for the bodge option. Breaking up the existing pad and building proper foundations ain't gonna happen until I get a good bonus and pay someone to do it! :cry:
 
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