Since lining up the apexes on Monday Jaimin had been back to mix up mortar to level the wall head of the lean to in preparation of the rafter and wall plate installation. (No photo as his phone was dead).
On Saturday he and Ali began by measuring up the wall plate, installing a DPM then fixing it using Thomas's SDS hammer drill to install hammer fixings along its length at 400mm centres. While Ali installed the wall plate, Jaimin measured up and prepared the rafters which required an awkward and probably not very well made reverse birds-mouth cut. These were cut in to the 3.6m lengths of C16, after determining the angle of the lean-to.
Oli arrived mid afternoon and boosted the team so to keep efficiency high, he and Ali began sarking the south facing roof while Jaimin prepared the rafters. Once all the rafters were cut and membrane stapled to the masonry-bearing part, Oli & Ali were called off the roof and together they installed all the rafters using the Simpson structural wood screws.
On Sunday Jaimin and Ali were on site. To begin, Ali re-commenced sarking while Jaimin made up some shims and supports to go under the rafters, to support them on the wall bearing part. After this he made up 2 sets of double noggins for the impending Velix roof lights. They unpacked the first Velux, quite a moment!
Installation appeared much more complicated than anticipated (mainly due to the manuals) and caused a lot of discussion. It transpires that despite everything in the building world requiring 600mm centres, and SK06 Veulx being 1140mm wide and therefore fitting between the 600mm centered trusses, they require an extra 40mm width to accommodate its "BDX Insulation Collar". Despite having bought this BDX collar thinking it was very important it appears to be not much more than an engineered bit of insulation that wraps around the Velux frame so can probably be replaced by expanding foam :-). Certainly better than cutting out a truss length and fiddling, we think.
After a lot of measuring the first single truss was cut with the circular saw, and a noggin was installed before lunch and Ali having to head away.
Jaimin managed to find a way to make the second cut of the truss and install the top noggin as well, which was not easy without support. Once done, some more time was spent interpreting the substandard Velux manuals.
After it was determined that no decisive progress was to be made on this front Jaimin went ahead and installed 4 galvanised tie down straps on the north wall wall-plate using hammer fixings into the wall, and twist nails in to the wall plate, to keep the roof tied down nice and snug.
After they were installed he decided to do some sarking on the lean to, which uncovered a decidedly incorrect spacing on one of the rafters. He then had to spend a good while remeasuring, removing screws, realigning and spacing, and reinstalling screws, before attaching all the truss clips with twist nails. Frustrating but good to have caught early.
Sarking then went ahead over the lean-to, which was abandoned at 7.30pm.
A long weekend with some more progress, we hope, in the week to come.
On Saturday he and Ali began by measuring up the wall plate, installing a DPM then fixing it using Thomas's SDS hammer drill to install hammer fixings along its length at 400mm centres. While Ali installed the wall plate, Jaimin measured up and prepared the rafters which required an awkward and probably not very well made reverse birds-mouth cut. These were cut in to the 3.6m lengths of C16, after determining the angle of the lean-to.
On Sunday Jaimin and Ali were on site. To begin, Ali re-commenced sarking while Jaimin made up some shims and supports to go under the rafters, to support them on the wall bearing part. After this he made up 2 sets of double noggins for the impending Velix roof lights. They unpacked the first Velux, quite a moment!
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| The *** BDX collar |
After a lot of measuring the first single truss was cut with the circular saw, and a noggin was installed before lunch and Ali having to head away.
Jaimin managed to find a way to make the second cut of the truss and install the top noggin as well, which was not easy without support. Once done, some more time was spent interpreting the substandard Velux manuals.
After it was determined that no decisive progress was to be made on this front Jaimin went ahead and installed 4 galvanised tie down straps on the north wall wall-plate using hammer fixings into the wall, and twist nails in to the wall plate, to keep the roof tied down nice and snug.
After they were installed he decided to do some sarking on the lean to, which uncovered a decidedly incorrect spacing on one of the rafters. He then had to spend a good while remeasuring, removing screws, realigning and spacing, and reinstalling screws, before attaching all the truss clips with twist nails. Frustrating but good to have caught early.
Sarking then went ahead over the lean-to, which was abandoned at 7.30pm.
A long weekend with some more progress, we hope, in the week to come.
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