May 182019

On Monday, we resumed work on the M section of the roof. The first job was to cut, trim and seal the fibre-glass trough module to fit the top of the valley and while the resin was curing, put up more slates. After lunch, the modified third piece of the valley trough was fitted and we then finished off the small triangular patch to complete the whole of the M section. This piece of roof has over 1800 slates on it. this now means we have covered approximately 30% of the whole roof.

M Section All Done and N Half Way There


For the final couple of hours left on Monday, we swapped our tools over to begin nailing up the tile battens up on the next section, the N part.
M Section All Done and N Half Way There


Tuesday saw the completion of the tile battens nailed into place and then we started on putting on the slates.
But we spotted something very odd in our gutters.
M Section All Done and N Half Way There


The rubber liner had “swollen” up in a bubble and when we had lifted up the metal mesh, realised that it was water underneath the rubber membrane, sitting on the oak. We had never noticed it before and we had to wonder where and how the water got into and behind all the layers of the breathable membrane up on the roof. Did this mean a hole somewhere? Did this mean a sealed joint wasn’t holding? Well, we got the vacuum cleaner out to sucked out the water and made sure that no more was lurking elsewhere.
Then we got out our garden hose and emulated a very heavy rain shower by spraying water from the top of the ridge line and all the way down the hip, to make sure that all the breathable membrane was fully covered in running water. We then waited over lunch for any developments.
After lunch, the verdict was no signs of any more water bubbling up behind the rubber. We can only put down this experience to a moment when we was putting up the membrane in the first place several weeks ago (by reviewing our photo gallery) and there is a possibility that one night, there was a short sharp shower and managed to allow a small amount (about 100millilitres) of rain water to slip behind the top line of membrane up the top of the roof, where the ridge line wasn’t covered until the following day.

We will have to keep an eye on this but nothing materialised during our water test and beside, as soon as we have put on all the slates, it will be fully waterproof anyway.
We put back the metal mesh over the gutters again and resumed the job of putting on the slates, starting at the valley end and working up the diagonal. We have also learnt our lesson about providing a fixed reference marks for the left end of all the rows by projecting up a vertical line and then measuring back from this one reference line, to all the starting points on the left end of each tile batten.
M Section All Done and N Half Way There


Wednesday and Thursday were taken up with Stephen’s Birthday and meetings but on Friday we got back to putting up more slates and continuing up the valley.

M Section All Done and N Half Way There


We managed to get the complicated valley all done and covered most of the N section with slates by Saturday afternoon. We had to stop because we ran out of room and we couldn’t get up and over on to the N section to complete the last few rows.


So for the remaining of the afternoon, we got on with the task of putting the rubber liner inside the gutter on the next section, the “O” section, and put up one central counter batten. This central batten was special because we couldn’t just nail it into place as the underlining structure, at this particular point, has a thick steel plate that reinforces the rafters. This means that nails straight down cannot penetrate into the rafter and secure the counter batten into place. instead, we used glue plus nails and positioned the batten slightly offset to one side. We fired extra-long nails at a slanting angle to hit and grip wooden rafter, bypassing the steel plate on the front of the rafter.
M Section All Done and N Half Way There


Next week, we will put up the breathable membrane, secured down by more vertical counter battens and then put all the horizontal tile battens right across the O section and we can climb this to complete the N roof, and also put another 500 slates on the O roof.

And here’s this week time lapse…

 Posted by at 6:00 pm
May 112019

Today, at the start of a new week, under a wet cloudy chilly sky, we finished putting up the tile battens on the M section of the roof, all before lunch time.

Starting on M Section


Starting on M Section


After lunch, we started putting up the slates, going up the valley and in the three or so hours of the afternoon, we managed 32 rows with two or three slates in each. It is a slow job measuring and fitting the slate into the angled valley, we got a good way up with about 19 rows to go.
Starting on M Section


Tuesday saw the installation of the kerb flashing along the Skylight, made up of a strip of rubber and a line of aluminium strips in front, both mounted on wooden short batten pieces spaced out every 500mm (see 1:29 in video).

Then in the later part of the afternoon, we finished off the valley rows and also finally, fitted the last couple of slates over on the I roof and the final ridge flashing slate along the J roof.

Starting on M Section


All day Wednesday and Thursday morning was a complete wash out in terms of working on the roof but we did instead do some analysis of the task in doing the windows (see Sorting Oak Timber for Windows) so wasn’t a complete waste of time.
Thursday afternoon, we resumed work on the roof and finished off the complex intersection of the K ridge line meeting with the valley coming up the L and M section of the roof. After that, we were able to mount approximately 300 slates in just two hours to conclude the day’s work. That was fast work!
Starting on M Section


Friday also had some rain interruptions and we lost a couple of hours in the afternoon. But we still managed to get a further 500 slates up on the M roof, we are well started up the other valley (the M-N valley) now but probably still have another 800 slates to go to finish this roof section.
Starting on M Section


On our final day Saturday, we continued putting up more slates, working up the valley, with shorter and shorter strips and in total we did about another 500 slates. There is just a fairly small triangle patch of roof left to do.
Starting on M Section


But we did have a short pause where we had to analyse why the position of one row of slates was slightly off (you will see the moment in the video below) and this is the first time it has happened. We concluded that the beginning of the horizontal row was not started in the correct position, we realised that there was too much of a risk of drifting whenever we start a new row on the left end. The lesson learnt today will help set up the next section of roof properly and mark the starting point on the left ends of each row from a known reference vertical line in the middle of a roof section.
In conclusion for this week’s work, we could have done the whole of the M roof section if we had not had the rain interruptions on Wednesday, Thursday and Friday.
Now enjoy the video of us dashing about on the roof!

 Posted by at 6:00 pm
May 092019

Because we had an interruption of work outside, due to rain all day Wednesday and also Thursday morning, we switched over to doing alternative work indoors. This time, we tackled the task of sorting out the design and quantity for the Oak timber used in our windows in the house. The windows will be our […]

 Posted by at 1:00 pm
Apr 202019

It was a week of lovely dry weather. We started the week¬† by tidying the workshop and completing the making of the Ladder Support stainless steel brackets and setting out strings to get the hip flashing straight (The roofs wobble a bit). We tackled the next job of putting on the metal Mesh Protector over […]

 Posted by at 6:00 pm