As you may know, my primary interest is in the field of Photography, and for those wanting to see some of the images or to purchase them visit gordon-longmead.artistwebsites.com
I sometimes wonder why I chose to do things a certain way. I suppose it seems like a good idea at the time but in practice it always poses harder questions than the easy route. for example, the ceiling. Simple solution would be to clad under the joists then climb in and insulate the loft space. But not me.
First I design the roof to be low profile so no room to crawl in. Then I decide to put the ceiling on top of the joists so as to leave them exposed. This created two known difficulties and one I did not anticipate.
Difficulty number one was getting 5m panels into the loft through the 400cm space between the joists. Pinning them down was easy as was getting the insulation into the area. Having the panels on top created a smooth surface so the insulation slid most of the way along the 5m length.
Difficulty number two was getting the last panel and associated insulation into place. Next time the ceiling and insulation will go in before I close up the front slope of the roof to allow easy access to the last panel… What am I saying? Next time? What next time?
The problem I failed to anticipate was the heat. I started the ceiling in the cool of the morning, 8am to be exact, but as is the case with British weather, the sun decided to shine. The outside temperature rose to a comfortable 20 degrees but I found breathing in the roof space more and more difficult as the day progressed.
As the ceiling closed so the heat increased, I tried the thermometer at 3pm and the reading was 32 degrees and rising, with that heat and the rockwool dust no wonder I could not breathe.
I know there are a few faults, but it is only a shed after all. The last job on the top half of the build is to insulate and close the sides. this is a simple if time consuming job.
The loo cubicle is up and waiting the arrival of the fittings, the tea station is ready once the plumbing and electric is done, beer fridge to follow.
Some of the railway dioramas have started to be moved into the cabin but it is doubtful that they will go in as they were originally designed to do. Apart from having a bit more space I am also planning to revert to my original design plan albeit slightly modified.
Well the cabin is finally closed in and cleaned up. I have decided to put in a flat ceiling above the joists to allow the roof void to be insulated easier (and cheaper), but still leaving the joists visible. That is the final major part of the structure build, after which the wiring for lighting and power will be installed.
I am currently looking at the option of a wind / solar power generator to provide power for the heating in the cabin. The latter being provided by greenhouse tube heaters. As I have no experience of these I will need to do some studying.
Realising that the human body has certain needs that would interrupt the flow of progress in the man cave, and discovering the required soil and water pipes just behind the cabin, I have decided to install a toilet with the obvious spin off that the kettle is also provisioned. This reduces the social area but the advantages are obvious. I also have enough room for the beer fridge in the same area.
Over the last 30 years my wife has been building a Christmas Village but getting it set up for a few weeks in December only to pack it away again I feel is a waste of time and certainly waste of the money spent on the buildings, so I have decided to use one wall to create a permanent home for the village complete with station and visiting trains. The scale will be wrong but at least she gets to see them all year. I hope that with a bit of creative landscaping I can create a winter scene separated from the main layout with a scenic break.
As you can see I have been continuing the build on the cabin.
The walls are now clad with hollow core plastic, the leading roof has been panelled and the door and windows are in.
The pond liner covering on the roof has now been topped with a heavy gauge cap sheet, it is supposed to be green but as is normal from a certain DIY superstore it has no less than seven shades of green and grey, still so long as it does what it should why should I worry, after all I can not see it.
The eaves are now closed all round except for where the power needs to be installed, and the rear eaves have been insulated. The inside timbers have all been treated against bug attack. Personally I will never suffer from woodworm or dry rot, I use a garden spray to apply the treatment so it showers everything.
Internally the walls have been insulated and plaster boarded and just need finishing, which just leaves the roof to be insulated and panelled. I intend to insulate the pitch and leave the joists exposed but I need to work out the best method for that because of the restricted space.
Just to ensure the cabin stays as a man cave I have dealt with the door window as one who knows me might expect …
It is not intended to be a work of art or even ‘correct’ but it was fun to play with.
Having moved the hardcore into the base it was time to cover with the carrstone sub-base. After using up the remainder of the original tonnage, about 5 tons, I needed to bring in another load of which about 6 tons was added to raise the level to what is seen in this picture.
Over the sub-base was installed the DPC. The reason the DPC is folded back is to protect the wall plates from the now constant rain. Things were getting very wet and very muddy. The weather had caused a delay of eight days, that being the time between the top image taken on the 14th March and the one above taken on the 23rd.
On the 24th I built the six main frames on the ground, then it started raining again so they got covered over and work stopped until the next dry day, the 29th March. Although I had arranged for some help to raise the frames, I became impatient after watching a program called Building Alaska in which it took five or six people to lift a single frame and fix it into place. And they were even then complaining about the weight. These are slightly smaller but were lifted into place and secured without help.
The support timbers seen in the picture held the frames upright while the second was lifted and cable ties were used to hold the frames together while they were screwed together.
On the 30th March the first order of timbers for the roof were delivered and by 8pm on the 31st I had part of the roof built and had run out of timber. Work stopped until my timber suppliers could deliver again, unfortunately the Easter break intervened so the delivery was delayed until Wednesday the 4th April with a second delivery of timber on the 5th. It so happened that the plastics for the walls also arrived that day so it was busy.
Today is the 7th April and the roof is up and watertight, the back walls have started to go up so I am back on track for the projected build time if not the cost.
Actually, I could have saved myself two weeks and 18 tons of sub-base, neither of which is now needed due to a change of design. The change was not planned and not even necessary except for one thing … cost.
The original plan was to have the floor as a concrete screed, cost was £75 per cubic meter of which the floor area needed 6, costing £450 plus VAT, total cost £540. Timber joists £288 plus VAT total cost £345.60, no contest.
A note on the roof construction, The unsupported span is a fraction under 5m so I am using 150mm x 47mm timbers for the main joists at 6m long on 400mm centers. The top joists are 100mm x 47mm also at 6m long. The top joists are posted to the main joists at each end with stud timber in the center. The sloping front also supports the roof by deflecting the weight loading.
On top of the joists I have used 25 of 12mm plywood sheets 2.4 x 1.2. This may seem thin by many, but the decision was taken on a number of levels based on past experience. The first was the weight that I would have to carry up the ladder and place on the roof. The second was cost. The third was calculated on the manner of the construction for the building.
The test for the strength of any roof I build is whether it will support my weight, well this roof does that and more.
The plywood was then painted with bitumen paint to seal it against water ingress before being covered with 7m x 6m sheets of pond liner. two positioned side by side with a third positioned centrally over the join. The last two were positioned over the first and sealed down with double sided bitumen pond repair tape. Once the front panels are in place the whole roof will be covered with a heavy duty bitumen cap sheet.
So now we are up to date with progress.
Constructing the cabin to house the railway is only part of the challenge, the other is building the layout. I am an impatient sort, wanting everything to be done yesterday, but I can stand in one place for 3 hours just to take a picture, (yes photography is my main hobby), so I have infinite patience.
The first start was a diorama which kept me busy in the autumn evenings, this was cut up into 5 pieces when I moved it into another room … second start. It rapidly became obvious that that was never going to work because I like big and the room was simply not big enough, especially when I was considering including an air field / show ground in the layout.
The question was, what to do and how to do it? the answer proved to be simple. The cabin will not be ready for some time so instead of thinking big, I needed to think small. In fact I needed to think modular. This light bulb moment came while reading a copy of Railway Modeller in which was being discussed exhibition layouts, all of which have to be modular to be transported.
This approach allows me to work on sections of the layout to completion during the evenings or inclement weather, and makes them easier to store until needed. As the frame is made from 3×2 timbers they are sturdy enough to be moved without cracking and eventually bolted together. The addition of legs and we have a complete layout with only the joins to cover.
You may notice from the image above that the scene is part of the first diorama, this has been cut and placed on the frame so that the other end of the original can be fitted on the left, thus rebuilding the back half of the original. The frame at the back needs to be strengthened with cross members, but the front will be left open with the MDF board fitted to the underside of the frame to provide a lower level. I will eventually use the same approach to recover all of the elements from the original diorama thus eliminating waste.
Since the last blog an argument with a very large tree branch resulted in me sustaining broken ribs and some damage to my leg. Funny how close calls focus the mind, 150cm to the left and this would not have been written.
However, we never let a little thing like aches and pains stop the important matter of the cabin being built. So since the incident I have discovered a source of hardcore at the bottom of the garden with which to infill the base.
There is about 38 tons in here so far with around another 4 tons still to be moved, I should perhaps mention that the bottom of the garden is 80m away and I only have a small wheelbarrow. by the time the remainder is moved and levelled it will be just level with the base of the top row of blocks.
This will be covered with the 14 tons of sub-base over which the DPC will sit. Then the ‘easy’ part, 7m/8m of concrete to the top of the wall and the inside is finished and the frame construction can begin.
The area to the right is also being filled, raising the level to the height of the existing patio area which will also be relaid. the area to the left is to be concreted or paved to give easy access for bringing things into the back garden.