Part 8 - Roof goes on
Entry posted by Stones
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A busy couple of weeks for the joiners has seen us progress from poured walls to roof on.
First order of business was removing some of the bracing used to secure the walls during the concrete pour;
and bolting a wall plate on ready for the roof trusses. A laser level (you can just make it out on the earth mound in the background) was used to ensure the wall plate was level.
Using a telehandler, engineered trusses are lifted into position and secured in place by the joiners.
The trusses over the link section and in the main room are 'attic' trusses, which are being used to create an MVHR serrvice room over the link section, and a mezzanine study that will look over the main living area.
Once the trusses were in, ridge beams for the areas where we have vaulted ceilings were lifted into place. Quite an interesting sight given the reasonably brisk wind we had that day!
This beam forms the master bedroom roof:
This monster, 9m x 450mm x 125mm forms the main living area roof (clear span).
In the absence of gable walls (which get built to suit the roof), posts were bolted into the ICF walls, the ridge beams being rested on top of timbers fixed to these posts. To ensure the ridge beams were level, a laser level was used (you can see it lying on the scaffold tower). In both cases the other end of the ridge beam is carried off a double truss (in the case of the bedroom) or a triple truss (in the case of the living area). You can just make out the oversized joist hanger used to secure the main ridge beam to the triple truss.
After positioning on the supporting posts, bracing timbers were screwed in to keep the ridge beams in place until the rafters were fitted.
The smaller ridge beam you can see on the left hand side of the house spans 2 metres, and is there to create a vaulted ceiling over the utility room (to locate an pulley clothes airer) and on the other side the staircase up to the mezzanine and provide a bit of feature to the small relaxing space below.
The rafters were fitted next, having been made on site.
Sarking boards (OSB) were used to cover the roof, and the gable ends were built up ready for a final concrete pour.
Rebar was used to tie the gable sections to the previously poured wall, and a thicker concrete mix specified to ensure the concrete didn't run out during the pour.
The day after the final concrete pour, a ventilation strip and structural fascia timber (to be clad later on) were fitted, allowing the last of the OSB sarking to go on.
The entire roof was then covered with a roofing membrane and is now ready for tile battens.
We still have plenty to do on the roof, not least the construction of the timber formwork for the lead covered skews which will finish the gable ends, something that has to be completed before we can tile.
To finish this entry, a quick glimpse inside to show the height of the vaulted ceiling in our living area.
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