Category: Build Progress

Today, we cut down to the required lengths the LVL timber pieces with the appropriate angles on their ends for both parts of the K Ridge Rafter. This one has an elbow joint half way along as it follows the shape of the roof going over the extension at the back of the house. The elbow joint is reinforced with a solid metal brackets, two of them, to sandwich the rafter in between and bolted together when it is assembled and installed.

These two parts are fairly usual in their construction with noggings and the polystyrene foams inserts etc. so work went very well and we now have two completed sections and they will dry (the glue) overnight before we tackle the next task of fitting the metal brackets into place and drill clearance holes for the bolts tomorrow and making sure we get it all aligned up good and proper!

These last two days has seen the start of the building the next set of rafters. The metal brackets pieces were painted to give them a semi protection against rust while they are exposed to the weather to until the roof is on!

Then we sliced up some polystyrene foam blocks to make the inserts for the K Ridge and the O Ridge elements (including the angled bits going down to the walls). and finally, to finish off the first day yesterday, we measured the diagonal distances from the K wall corners and middle location, back to the central point on the steel I-Beam and analyse this against the drawings. It turned out to be pretty close, only 10mm offset for the two outside corners and 19mm offset in the middle of the K wall. This is close enough for us to continue to build the K Ridge and if there is any adjustment needed to be made, we can slice off little pieces off the beginning of the K ridge during installation.
Today, we sorted out all the plywood strips we had already made, also took all the “waste” plywood strips and moved them into our garden shed for storage and easier access. We spent all day slicing up more plywood sheets and other strips to generate all the webbing we will need to complete the remaining Special LVL Rafters, as follows:

• 9 x 400mm wide
• 6 x 413mm
• 12 x 423mm (already done previously)
• 18 x 455mm (taken from 20 strips left-over pieces)
• 4 x 477mm (two already made with a further 2 today)
• 4 x 508mm wide and that’s it!

We tidied up the pile of these plywood strips and put all the ones that will make the O Ridge series of rafters and stored them in the garden shed. Also, we brought in four lengths of our LVL timber pieces, 3 x 4190mm and 1x 3500mm lengths. We got our template back into shape again and started with our first rafter, the K Ridge. This 477mm wide object has 4 strips of the webbing and sliced a shallow angle cut (only 10.5 degrees) on one end of the plywood. This end will be push into the metal bracket and joined onto the second part of the rafter, the K Angled, which goes down at a 45 degree slope to the wall.
Tomorrow, we will cut the LVL timber and then sand to get them ready for gluing and nailing.

Today, we did two jobs on the fly. One was on the computer to organise, sort out and prepare diagrams for the steel bracing support unit, and the other job was to tidy up the workshop and bring in the various steel strips from the shelves outside under cover. The steel had to be sanded to remove the little bit of rust on the top most strip of the pile, so using the orbital sander with lots of emery cloth discs to go up and down each strip to remove as much of the rust as possible.

The Steel Bracing Unit that holds and reinforces the K Ridge element (this is the section of the house with the extension at the back over the Bedroom 2). The picture below shows the 3D diagram of this module.


Tomorrow, we carry on with the preparations and soon will be slicing up these steel strips into the jigsaw pieces to then be welded together.

This morning, we took out the completed rafter we had glued and nailed yesterday out to get it up into the HI corner of the building (Bedroom 3). We had a pile of excess timber material plus the other corner legs, all covered up so we had to try a different method of lifting the rafter up. We thought we would try lifting it using just the one winch motor, the one on the very tall and much stronger support arm. Actually, it turned out to be relatively easy to control, to lift the sticking out end up and over the wall first and swing the rest of the rafter back up and above the steel I-Beam and bring it down into position quite easily. It slid into place without fuss so that was that. We did our usual of gluing the corner leg into the two cement boards and screw them all together. Then glued the webbing and bird’s mouth all over the place and plus the metal bracket and the kerb at the other end of the rafter. The whole lot then was reinserted back into position and nails hammered into the side of the metal bracket and screws at the wall end to fix things down while we waited for the glue to set.

And that was it! Using the single winch might turn out to be a good discovery and may speed up the operation of getting all the rafters up and into position. We will see. The next job with these special LVL Rafters is to make the metal bracing bracket that will join and support both the K Ridge and O Ridge together. After those are done, there would be only 7 more diagonal rafters (4 Hips and 3 Valleys) to go and we would be finished with these complicated and specialised elements of our roof!

Just for this morning, before we have other commitments and before the rain comes, we went outside with our completed EH Hip Rafter and installed it into place (the Utility Room corner). It was a fairly easy operation as this rafter doesn’t have a sticking out eve piece. We first glue and screwed the vertical leg into the corner and screwed the two outside cement boards hard back onto the leg. This provided support to allow us to use a crowbar to push the rafter back up towards the steel I-Beam and the Kerb as our tests revealed that we needed to shift the rafter back again after being dropped into the metal bracket at the top. Then, the two ends of the rafter was glued and finally nailed into place in the metal bracket to lock it tight while the glue sets.

After tidying up the towers and covering up the winch motors to protect against the weather, we went back in the workshop to spend the last hour to assemble our 3rd rafter in this set we have been doing these last week or so. That was also a fairly easy job as we had the pieces all ready for the task, so with a quick vacuum everywhere, we glued and nailed the HI Rafter so it can dry overnight before also being installed.

Tomorrow, we will put up this third rafter and then start the next job of preparing everything to make a set of metal bracing parts for the K and O Ridge sections on the two back extensions.

This morning, we got down to putting the finishing touches to the materials that form the EH Hip diagonal Rafter. All the webbing plywood pieces and both the top and bottom LVL flanges were sanded. Then we moved on to the HI Rafter, we went outside to measure the top flange which turned out to be 5635mm, so we cut in the bird’s mouth and sliced the inverted arrow cut-out at the other end at that measurement. We tested this piece outside again and all is well. We then cut the bottom flange to size.
Back in the workshop, we vacuumed everything to get rid of the dust and then started building up the layers of the EH rafter in the template and glued and nailed the whole lot together, on both sides, of course not forgetting to insert the polystyrene foam pieces too.

That concludes the day’s work, but first thing in the morning, we will assemble the other rafter, the HI one, and get that one all glued and nailed so it can be drying while we take outside the EH rafter and mount it into place, and on Saturday, we will mount up the HI rafter and we would finally have done those three similar rafters – At Last!

This morning, under a very nice sunny blue sky, we took out our completed PA Hip Rafter from the workshop to the building site, and after positioning the towers into place and trying 3 times to lift it up, finally made it to get it into place just before lunch!

The trouble was that this rafter has a long sticking out bit that forms the Eves of the roof and goes out to the facia board and the guttering. This meant that we couldn’t lift the beam high enough one way and ran out of lifting wire on the winch before we could get it up. We finally shifted around one of the towers so it gave us more freedom of movement and also hit on the idea of lifting the other end (the end with the sticking out bit) first into the air so it overhung the wall entirely and this allowed the other end to come up and miss the obstacles on its way up! Phew! Oh yes, it fitted just fine!!
After lunch, we smeared lots of glue all over the joints at both ends, up and down the leg and on around the top-plate of the wall. We wiggled and banged the rafter into the corner and inside the leg, and also slid into the metal bracket and against the kerb at the top too. All then was fixed down with nails and screws to hold it while the glue sets. Hooray At Last!!

We carried on by moving the towers across to the next corner, the EH corner in the Utility Room and got our templates to measure the distance of the top flange which turns out to be 5570mm long. Inside the workshop, we took the correct LVL timber, sliced a flat bottom on one end and an angled cut upwards, and then measuring from that point, marked the timber at the other end at the 5570mm and drew the inverse arrow head with the tilt backwards. This end goes up and connects to the kerb of the Skylight. We carefully sawed out this inwards facing groove and took it outside to test it. Yes it fitted very nicely!
Finally, we removed the excess plywood sections on all the strips, both for the EH rafter but also for the other corner, HI too. We transferred the pattern over from the HI webbing to the EH but in a mirror orientation so all our webbing is now ready for sanding and assembling into rafters tomorrow. We hopefully can get both of them glued and squeezed together and have them dry and ready to go either Friday or Saturday. Fingers Crossed!! Grin!