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The Timber Frame Arrives

Posted by ProDave , 22 September 2015 · 1,568 views

This blog entry will be updated each day that there is more progress erecting the house frame.

Day 1:

First job, lay the ground floor joist. these are I beam engineered timber joists, 300mm thick. Here they are starting to be set out.
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It took a fair bit of the day to set them out and lay a temporary OSB floor covering to work from. Unfortunately I had to go out and work so missed a lot of that. Eventually the gap between them will be filled with insulation, but that's a job for later.

By the time I got back part of the frame was going up:
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As you can see, all the panels are being lifted with the builders own wheeled digger with a boom extension, so no need for crane hire.

Day 2:

Timber frame to ground floor completed. Internal downstairs load bearing walls in place. More scaffold erected to enclose the whole building ready for installing the first floor posi joists and erecting the upstairs panels.

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Day 3:

A slow day today, a rather wet and windy day. Just the first floor posi joists fitted in place.

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Day 4:

Now we have better weather, here's a picture of the framed view of the mountains from the kitchen window

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After finishing the detail of the first floor, they all went off and fetched a load more panels:

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And here they are erecting the two main gable ends of the house:

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And here's one more view of those mountains, this time from the first floor bedroom window.

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Day 5:

The remainder of the upstairs wall panels are now in place.
Scaffold removed from one gable end ready for the garage frame to be erected.

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That completes the basic house frame after 5 days on site.

Next stage is erect the garage and sun room, then frame all the roofs (still waiting for the main ridge beam). That will be a new blog entry for those.




tennentslager
22 Sep 2015 09:12 PM
Looking good...it looks huge
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No not huge. 69 square metres per floor.

It's nice for the first time to actually see the framed view out of the end kitchen window down the road to the mountains.
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Nice one. The only mountain-shaped things we'll be able to see will be the roofs of the surrounding houses.
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Just realised that with your TF you'll be insulating from the outside rather than the inside and curious as to why it's done that way?
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The outside will be clad in 100mm wood fibre insulating board then rendered (no blockwork like an "ordinary" timber frame)

Once the outer is clad, then later on, blown in wood fibre insulation will fill the void, blown in from holes drilled on the inside OSB layer then sealed.

We can't have OSB on the outside as it would create a condensation risk. As you move from the inside to the outside the materials must become more vapour permeable. I have the printout from the designer to illustrate there is no condensation risk with this wall make up.

The OSB on the inside is the main racking strength of the building, and in places will be doubled up to two layers thick with staggered joints.
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Okay, I get it. Interesting stuff. We won't have a brick or block outer skin either, just a 47mm air gap outside of the breather membrane and then a mix of thermowood and Cedral Click cladding.
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That's interesting about the condensation risk. Most builds seem to have OSB on the outside. So what makes the difference?
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5 days on site and that's the timber frame up. Roof framing, garage and sun room will be fresh blog entries.
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I thought OSB was vapour permeable?
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Who supplied/provided your timber frame? I read of your trouble getting quote in an earlier thread
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The design was done by a local eco home builder Carbon Dynamic.

The frame was actually built and erected by a local building firm Northmuir Ltd.
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May 2018

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