Category: house build

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The joy of posi joists

When the photos arrived last week from the site, one of the things that most struck me as a building novice was our joists.

I had never seen joists like this before. To be honest, I’d never given joists much thought. Thankfully our architects had!

A few minutes research online confirmed that these were web or posi joists, and that they’ve been around for a while.

Hugely strong with a steel web reinforcing the timber struts, they enable long spans of floor to be constructed without structural reinforcement such as load bearing walls, and their open nature allows easy installation of services, like MVHR.

MVHR (Mechanical Ventilation and Heat Recovery) systems are a very effective way to reduce the heat energy used in thermally efficient homes. We will be installing MVHR and these joists enable the ducts to be run through the construction very easily.

There is also less movement in these joists than with traditional timber, meaning more solidity to floors, less creaking and better sound insulation.

The more I read about these joists the more I realise that these were a great inclusion, and yet another element of the build that I’ve been quietly impressed with.

This may look like a traditional island house from the outside once it’s clad in larch and its roof has been slated, but its bones will be made up from the latest technologies in building innovation, making this a warm, strong, energy efficient construction which I hope will benefit us for many years to come.

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Three days in…and we have walls!

It’s remarkable how quickly the house now starts to take shape. This is progress three days in since the first panel was lifted into place, and although there’s much to do, they’re fairly cracking on with this.

All of the exterior panels are up, the beams are in and a waterproof membrane has been applied to protect the panels from the elements.

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SIP panels going up

The SIP panels were delivered to site today and are starting to go up…

It looks a bit like a dolls house being built at this stage, although these panels are massively strong and well insulated.

Suddenly the house looks tiny…

When we looked into house build construction methods back at the design stage, we decided on SIP (structured insulated panels) for a number of reasons.

  • Speed of Construction
    Building with SIPs is a fast construction method. It is entirely possible for the SIP house ‘shell’ to be completed within seven days.     Ours will take 2-3 weeks, we think. Useful on a rainy island.
     
  • Environmental credentials
    SIP-built houses are highly energy efficient, with the result that they are easier to heat. This means less harmful CO    2 released into the atmosphere. Very little energy is used during the SIP manufacturing process, with SIPs using up to 50% less raw timber compared with conventional timber frame houses. We like that.
     
  • Sound Proofing
    SIP panels have excellent sound absorption properties with the result that the finished buildings are quieter to live in.     After years of living in flimsy walled modern flats and houses with sound systems, guitar practice and video calls all going at once, this is a definite advantage!
     
  • Structural Strength
    SIP walls can be up to seven times stronger than conventional timber frame.     The strength of SIP structures allows for thinner walls and no bulky roof trusses.
     
  • Thermal Performance
    Insulation is integral to the SIP system, and therefore doesn’t require installation at a later date. The superior thermal performance of a SIP structure will last the lifespan of the building, thanks to the solid core of insulation throughout the structure. This means that the building is heated evenly, is free from cold spots and benefits from reduced heating costs.
     

I guess the proof of the pudding, as they say, is in the eating… 😊

Only time will tell, but we have high hopes!

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Dribbles from the island

Updates dribble in slowly from the builders like the intermittent drip from a tap.

Not known as the most patient of people, I await them anxiously, counting the days and weeks since the last email. It’s tough being remote from a build project when it’s your very future going up one block at a time.

Updates do come though – not every week, and not always with accompanying photos, but progress is definitely being made.

I believe that the concrete has been poured onto the foundation slab and that the builders are ready to start erecting the SIP panels next week. They’ve advised that the panels normally take about three weeks to complete.

After that the roof slates go on, then the larch cladding for the walls. By the time we visit in September we’ll definitely have the semblance of a house to see, even if it’s just the exterior shell.

It’s going to be an emotional moment.

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Taking Shape

It’s taking shape, and the builders have been working hard to move this on whilst the weather holds.

It looks as if the sewerage treatment plant is starting to go in, and the outlet pipe is being connected. This will discharge clean, treated water via an outfall into the burn at the back of the house.

Let’s hope that the water and electricity connections will be confirmed soon, as we won’t be able to progress beyond the summer without them.

It’s so good to see the house starting to emerge from the land. This is the first time that I’ve really been able to visualise it properly in it’s setting, and I think it’s going to sit well….

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More progress, and the static

The kindness of strangers never ceases to amaze us. We’ve been offered a free static caravan by locals on the island to live in whilst we complete the build.

It’s old but fully functioning. It will need a lick of paint, a new boiler and replacement carpet in the main living area, but with all of that and transport costs it will still save us many thousands of pounds.

I’d been researching static caravans and not only are they pricey but the haulage costs can be massive. Due to their ten or twelve feet of width they need a police traffic escort, and so even bargains elsewhere in the U.K. would cost many thousands to transport to the island.

(This image was taken before two years of mud from their house build site was trodden in..😊 it looks much worse now…)

The couple that have offered it to us have been living in it themselves until recently as they completed their own self build, and can make it available from September, which is perfect timing for us. We’re so grateful.

We will be siting it close to the house itself so that connection to power and water will be easier.

The foundations are progressing at pace now, helped by the recent good weather.

This does mean that it will be perched in a somewhat exposed position on the top of the hill of the croft, and a local friend suggested that tethering the static to concrete footings with lorry straps might be prudent due to the winter gales on Skye. We’ve asked the builders to create tether points for us in the hard standing at the back of the house site so that we can do just that.

We don’t fancy tumbling down the hill like a corrugated tin dustball in a storm…

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Foundations

The builders seem to be moving quickly now. The track is in and the preparation for the house foundations has begun.

We’ve been lucky that they haven’t hit hard rock when digging the foundations. Just shale. We know that there’s an outcrop of what we think is Lewissian Gneiss just a few metres away from where the house is being positioned, which would have required blasting at great effort and expense..

The conduits are in for water and electricity, although connection of both services may be quite a slow process as SSE and Scottish Water both have significant backlogs due to Covid-19 and are not prioritising new connections as essential.

Next week the substructure build begins.

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House site excavations

The access road has now been excavated, drained, and levelled as far as possible. It’s received it’s base of crushed stone and can support the heavy plant that will be trundling up and down the croft over the coming months.

I still think it looks massive and am hoping that it will weather to a darker colour and blend a bit more into the landscape over time.

At the moment it looks as if aliens visiting Skye could easily sight this from space and use it as a landing strip…and yes, maybe this thought was prompted by the re-runs of the X Files that we’ve been watching in lockdown..😬

The house site excavation at the top of the croft has also started, with poles being laid out for alignment.

So, it’s moving! There may be some delays sourcing concrete for the foundations, but the local hospital rightly takes precedence for these supplies and we are happy to wait our turn in these difficult times.

We are on our way.

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The track begins

And so it begins. The builder has been sending us photos and videos of the emerging access track whilst it’s being excavated. Very exciting. It looks wide enough to be a motorway in this picture! Sadly building regs dictate that it has to be wide enough for a fire truck to get up to the house, so it does seem wide, but it’s the minimum width we can get away with…

As we suspected, the gradient is very steep in places. The builder has excavated a borrow pit on the croft for extra soil and rock for infill and will try and smooth out the most extreme parts of the slope, although it’s always going to be a steep climb up to the house.

As we also suspected, the boggy bottom of the croft at the base of the hill is actually almost a lake once the soil has been removed. You can see the water level clearly in this photo, right where the entrance bellmouth will be connecting to the communal village road. The video from the digger shows this clearly too.

There will be drainage into both the culvert and back onto the land so that we can remove enough water to make the road viable, but also further along in the process we can perhaps dig a wildlife pond in this area. That plus willow and alder planting and we hope that it will dry out enough to be useable. If not, it’ll be a big natural wetland area, which I’m sure will do wonders for the croft’s natural diversity!

The builders seem to have managed to circumnavigate the two big granite outcrops at the top of the croft and run the road between them. Which is good. Rock blasting and removal is another expense that we are heartily glad not to incur on an already massively expensive road.

But it’s progress! We are so cheered to see this. At last, for the first time after all these months of planning, specification and permissions, it actually seems real.

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Digger on the croft

The builders have just emailed to say that they’ve moved a digger onto the croft in the expectation that they will be able to start groundworks (the access road and hard standing for the house) any day now.

This small positive piece of information has lifted my entire week.

It’s starting at last…😆