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Mike's Workshop Build (Extension & slates)

Roll up, roll up. Here you will find everything from new workshop designs, through builds to completed workshop tours. All magnificently overseen by our own Mike G and his tremendously thorough 'Shed' design and generous advice.

Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby PeterBassett » 06 Mar 2015, 11:11

Hi Mike. I've been following this and your house build thread avidly, they are both fantastic.

Can I ask about the electrical runs in your workshop? I see you are not using any trunking, simply clipping the cables to the walls tidily. Will this pass an electrical inspection to get signoff? I ask because I need to install lighting and sockets in my garage and don't want to have to do anything twice if I can help it.

Thanks

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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Mike G » 06 Mar 2015, 13:45

Yes, Pete, I don't expect any problems with that so long as the clipping is to standard. Electricians say that surface mounted wires are the safest possible: you always know where they are, and won't ever therefore drill into one buried somewhere in a wall.
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Deejay » 06 Mar 2015, 17:10

Afternoon Pete

Those nice people at TLC have published this ....

http://www.tlc-direct.co.uk/Book/4.4.1.htm

which gives the maximum spacings.

Cheers

Dave
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby 9fingers » 06 Mar 2015, 17:22

Deejay wrote:Afternoon Pete

Those nice people at TLC have published this ....

http://www.tlc-direct.co.uk/Book/4.4.1.htm

which gives the maximum spacings.

Cheers

Dave


Dave, I reckon that book section of the TLC website would make a good link to include in your dropbox stuff?

I often reference their cable size calculator when people ask about cable run to workshops too.

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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Deejay » 08 Mar 2015, 10:44

Morning Bob

Good idea.

It's in issue 8.

PM'd the new file.

Cheers

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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby 9fingers » 08 Mar 2015, 11:14

Thanks Dave, just uploading to the dropbox now.

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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby PeterBassett » 09 Mar 2015, 14:31

That's excellent. Thanks all.
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Wizard9999 » 26 Mar 2015, 12:37

Mike

Not sure why, but it crossed my mind this morning that you have still to put the slates on your workshop roof and I seem to remember that you have said in the past that the breather membrane degrades in UV light and can therefore only be left a limited time before being covered? Am I going mad?

Terry

Who knows he needs to update his own workshop thread, but at this stage with EPDM roof on and having semi-clad it is too embarrassed to do so as he can't work out why he still can't seem to get it water tight :(
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby the bear » 26 Mar 2015, 16:53

Terry
Post some pics of your problems, someone will be able to help I'm sure
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Mike G » 27 Mar 2015, 21:19

Hi Terry.

Yeah, the stuff breaks down over time in UV light, but there is a distinct shortage of that through an English winter, and the fabric is still 100%. I am planning the removal of the slates from the main roof of the house at the moment, and they'll then go onto the workshop.

Sorry to hear you are still getting leaks. The answer will be somewhere at the edges of the walls....the top (junction with the roof), the bottom (junction with the plinth), or the corners (vertical join between feather-edge boards and the corner post). You might find that a bit of time with a silicon gun is your only answer.
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Commander » 04 May 2015, 17:19

Just read through this thread as well, and I have to say I enjoyed it as much as your renovation tread!

One observation I would like to make is that I was surprised to see that you guys use lead on your roofs, here by us the flashings etc are made from galvinzed steel. What is the reason for this? I would think lead is bad for the environment?
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby 9fingers » 04 May 2015, 17:44

I'd imagine that dressing steel to fit tile profiles and other shapes would be very difficult and even if you did, the hammering would compromise the galvanising.

Might also be a climate thing. Galvanised sheet used to be used here on sheds but might only have 25 years life before it rusts through. Modern equivalent buildings use a aluminium and foam sandwich with factory made fittings to match the profiles.

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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Mike G » 04 May 2015, 18:44

Commander wrote:Just read through this thread as well, and I have to say I enjoyed it as much as your renovation tread!

One observation I would like to make is that I was surprised to see that you guys use lead on your roofs, here by us the flashings etc are made from galvinzed steel. What is the reason for this? I would think lead is bad for the environment?


Thanks Erich.

Lead is still absolutely standard over here, probably because it is consistently doing the job it is used for better than any alternatives. I doubt very much of it ends up actually in the environment because it has a very high second-hand value, and everyone always collects old and scrap lead from building projects, and takes it in to a recycler in exchange for some good money. It is turned back into lead sheet with little in the way of embodied energy. Furthermore, it can be made into some very useful shapes without resorting to welding, and is easily worked by any jobbing builder without having to call in specialists (as is necessary with aluminium or PPC steel, for instance).
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Commander » 04 May 2015, 19:15

9fingers wrote:I'd imagine that dressing steel to fit tile profiles and other shapes would be very difficult and even if you did, the hammering would compromise the galvanising.

Might also be a climate thing. Galvanised sheet used to be used here on sheds but might only have 25 years life before it rusts through. Modern equivalent buildings use a aluminium and foam sandwich with factory made fittings to match the profiles.

Bob


I think perhaps the requirement is different, the flashing is placed under the tiles and is not hammered at all, just nailed to trusses or brandering. I suspect our roof designs (generalizing a bit I know...) may be less complicated hence not requiring the flashing to be shaped extensively.


Mike G wrote:
Commander wrote:Just read through this thread as well, and I have to say I enjoyed it as much as your renovation tread!

One observation I would like to make is that I was surprised to see that you guys use lead on your roofs, here by us the flashings etc are made from galvinzed steel. What is the reason for this? I would think lead is bad for the environment?


Thanks Erich.

Lead is still absolutely standard over here, probably because it is consistently doing the job it is used for better than any alternatives. I doubt very much of it ends up actually in the environment because it has a very high second-hand value, and everyone always collects old and scrap lead from building projects, and takes it in to a recycler in exchange for some good money. It is turned back into lead sheet with little in the way of embodied energy. Furthermore, it can be made into some very useful shapes without resorting to welding, and is easily worked by any jobbing builder without having to call in specialists (as is necessary with aluminium or PPC steel, for instance).


Well that all makes sense, I suspect it boils down to different construction methods and materials between the UK and RSA.
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Andyp » 04 May 2015, 20:10

If my roof is typical than lead also keeps the moss and lichen at bay. The only part of my roof that is moss and lichen free is beneath the lead flashing around the chimney.
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cheers
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Mike G » 04 May 2015, 20:24

Andyp wrote:If my roof is typical than lead also keeps the moss and lichen at bay. The only part of my roof that is moss and lichen free is beneath the lead flashing around the chimney.


Copper is even better for that. In fact, some people will run a copper wire along the length of their ridge so that the cupric oxide will keep their roof free of moss and lichen.
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Mike G » 04 May 2015, 20:31

Commander wrote:I think perhaps the requirement is different, the flashing is placed under the tiles and is not hammered at all, just nailed to trusses or brandering. I suspect our roof designs (generalizing a bit I know...) may be less complicated hence not requiring the flashing to be shaped extensively......


Let me translate :)

Branderings are like thick battens. They are strung over rafters which are generally much further apart in SA than we have here, and either support profiled metal sheeting, (inc corrugated galv. steel "iron") or interlocking concrete tiles. I don't think I have seen clay tiles in SA. I haven't worked out how flashing under tiles works, but then South Africans seem to "gunk up" lots of junctions on rooves with flexible sealants.....something we just can't rely on here. Some also paint their roof tiles!!

And yes, as Erich says, their rooves are very much simpler than our, typically, and generally of a very much lower pitch.
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Rod » 04 May 2015, 21:18

Lead is also used to cover complete roofs of older buildings especially Churches.
It is so valuable, that sadly lots of churches and other buildings are robbed of their lead causing lots of damage and great expense as it has to be replaced.

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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Mike G » 04 May 2015, 21:23

Rod wrote:Lead is also used to cover complete roofs of older buildings especially Churches......


Absolutely, and it is generally formed in a very different way from sheet lead bought on the roll. It is cast over a bed of sand, which is a highly skilled process, and one which produces a characteristic appearance to the lead.
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Andyp » 05 May 2015, 07:42

Mike G wrote:
Andyp wrote:If my roof is typical than lead also keeps the moss and lichen at bay. The only part of my roof that is moss and lichen free is beneath the lead flashing around the chimney.


Copper is even better for that. In fact, some people will run a copper wire along the length of their ridge so that the cupric oxide will keep their roof free of moss and lichen.


I have heard of that and would do so but I would need a 3 piece ladder to get up to the roof on one end of the house and I don't fancy that at all.
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cheers
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby RogerS » 05 May 2015, 08:32

Lead is great. Provided it is laid properly. When they laid the lead down in the gulley between our two gables many, many years ago, the idiots laid down lengths that were far too long. Consequently, over the years the normal thermal cycling had them expand-contract-expand-contract until they'd developed little dams with a, guess what, a nice split in the top. So water pooled up behind the dam and then into the split hence into the wood underneath. Great.

SWMBO also bought a very nice summerhouse with a lead roof. Only they didn't lay the lead properly or leave enough overlap and so rain is blown up underneath and again thence into the wood underneath and dripping onto the floor. Despite my best endeavours, I've not been able to seal it up properly. Water is still getting in.
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Commander » 05 May 2015, 10:47

I will see if I can get some photos of what things look like over here, our climate is much dryer so moss on roofs are almost non existent, same goes for the danger of wood rotting under the tiles I guess.
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Rod » 05 May 2015, 13:39

Moss is a real pain in the backside here - not only filling the gutters but making a mess on the surrounding paths and patios?
The birds seem to love it, looking for insects but in doing so scatter it around and off the roof.
I've heard of the copper wire treatment but never seen it done and much too scary for me to contemplate DIY.

Rod
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Commander » 11 May 2015, 05:53

I was able to take some photos of local roofs over the weekend, Mike, if you don't mind I will post them here, if you guys are interested?
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Re: Mike's Workshop Build (Bench, woodrack & tour)

Postby Mike G » 11 May 2015, 08:46

I've no problem with your photos going here. Think of it as "matters arising"...... ;)
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