Roselea

Category: Orders and Procurement

  • Day 4 of Shopping List – Roof Rafters Continues

    Today was spent going into the numbers and double checking the figures and sums for the Outer Wall and then continued with the Roof structure analysis.

    The Roof is by far the most complex aspect of this task, with half a dozen different types of material being used in the construction of each Rafter and Beams (whether it is a ridge, hip or valley) plus the amount of glue (several different kinds of those too!).

    Here is the latest summary so far:

    • 125 lengths (600metres) of 89mm CLS timber
    • 104 lengths (500metres) of 63mm CLS timber
    • 138 sheets (415 square metres) of 12mm plywood
    • 80+ litres of non-creep structual grade wood glue (sticking plywood onto flanges)
    • 40 sheets (116 square metres) of 35mm thick PU foam insulation panels (fill volume inside rafters)
    • 13 cans (350 litres) of Gun Spray PU foam (filling the small gap inside rafters)
    • 51 tubes of MS Polymer Construction Glue (only for sticking the cement boards onto rafters)

    There is another day’s work to finish off the calculations for all the roof members and support blocks and noddings.

  • Day 3 of Shopping List for Timber and Boards

    At this stage of the analysis, the roof rafters are now being quantified. There are over 200 individual pieces, ranging in length from a few hundred millimetres, all the way up and over five thousand millimetres long!

    Each rafter is a box beam, made up of a top flange using a 89mm CLS timber and a bottom flange of a 63mm CLS timber, sandwiched by two layers of 12mm thick high quality plywood boards. The hollow space inside the rafters will be filled up with insulations to avoid any “cold bridging” to stop heat from escaping.

    The current summary of numbers are:

    • 125 lengths (600metres) of 89mm CLS timber
    • 105 lengths (500metres) of 63mm CLS timber
    • 138 sheets (415square metres) of 12mm plywood

    Continuing with the roof structure, are the main ridge beams, hip and valley beams and other structural beams that helps join all the rafters together from the walls and up to the steel framework. So further analysis is being done on these items and will be added to the shopping list.

  • Day 3 – Ground floor Internal Walls and Floors Calculated and Added to Shopping List

    After our outside work was all done and dusted, the analysis of our timber requirement carried on this afternoon and evening, to add more items to our Shopping List.

    Our Procurement Officer (Stephen) worked on the ground floor’s internal walls, rails and the flooring with the following results:

    • 1.8km (just over one mile) of 63mm CLS timber for the structure of the walls
    • 1.2km (three quarters of a mile) of 63mm CLS for the horizontal rails on walls
    • 190m of oak planking for the utility rails
    • 560 m² of 25mm cement boards for the wall linings
    • 1.2km (three quarters of a mile) of 63mm CLS timber to support the flooring
    • 320 m² of 18mm OSB for the flooring itself

    This is another 4.2km (over two and a half miles) of timber to add to our Shopping List!

  • Day 2 of Building Up Shopping List for Walls and Rafters as well as All the Internal Walls

    Today, with only having one bloke on duty and the other one away at external meetings, the analysis of the design of the house and tallying up all the required timber pieces and cement boards plus plywood sheets carries on.

    The outer wall needs over  a mile of timber plus a load of cement boards and a heap of OSB webbing pieces (about 18 full sheets)

    • 165 X 89mm CLS Timber (standard 4.8metres lengths)
    • 211 X 63mm CLS timber pieces
    • 17 x treated 100mm by 50mm Timber
    • 24 x treated 63mm CLS timber pieces
    • 65 sheets 10 mm thick by 2400 mm by 1200 mm Cement boards
    • 15 sheets 11 mm thick by 2440 mm by 1220 mm OSB boards

     

    and this is just for the outer wall – grin!

  • Generating Shopping List for Timber

    This morning, the task was started to analyse all the pieces of timber we need for the construction of the house, whether it is for the outer walls, rafters for the roof, and all the internal walls, adding each length of timber and making sure we order enough contiguous pieces to go around all the required locations.

    It is quite a lengthy process where each timber is crossed off the drawing and how many single pieces can be obtained from the stock length supplied by the merchant, which is usually 4.8metres long.

    We are getting to the point where we are ready to start building the wooden framework of the outer wall and then the roof rafters after that.

    There will be other items on our shopping list, for example, the 10mm thick cement boards for the outer skin of the walls, and 15mm thick cement boards for the roof. Then we will need lots of 12mm structural plywood boards too as part of making our own roof rafters (they are box beams).

    So this is a large job!