Construction weeks 33 & 34 – plumbing, hvac and more

manifold system

manifold system

plastic in the walls

plastic in the walls

Wow, it’s been a couple weeks since I’ve provided an update. The house has been relatively quiet with only one or two people working at a time. That has since dramatically changed…

Nathan, from Ackland Plumbing, has finished the first rough-in phase for plumbing. We’ve got spiffy (BPA-free) breathable supply pipes running through the house, and a purple one which supplies the grey water. He was explaining to me how, just 10 years ago, a different kind of plastic pipe was getting installed in Canadian houses, one which does not breathe and where water stagnates and becomes unsafe for drinking. Insurance companies will not insure these houses and lawsuits are being filed against the building code. Lesson learned: what seems like a good idea today, may very well prove to untrue tomorrow. And wet things need to breathe, trapped moisture is the enemy of building. I digress. Back to our house.

Nathan managed to carefully maneuver all supplies and drains in and between our open floor trusses and walls. The design of our house helped to facilitate this, with Mark stacking all the plumbing and electrical to one side of the house, over the mechanical room. (This poses absolutely no risk Myles btw (comment from previous post), it’s actually a really clever thing to do when building because all utility runs are minimized in terms of materials and labour). We’ve received numerous compliments on Nathan’s handiwork and it passed the plumbing inspection no problem-o. He’s as excited as we are to have a neat and tidy mission control in our mechanical room, where we’ll go copper for added ‘wow’ factor. Good stuff.

wood fibreboard clads the house until the siding gets installed overtop

wood fibreboard clads the house until the siding gets installed overtop

the cardboard box phase

the cardboard box phase

Speaking of passing inspections, we also passed our building envelope inspection. Hooray! We were nervous about this one because we weren’t sure how the inspector would feel about forgoing the traditional Tyvek weatherproof house wrap for our wood fibreboard. The wood fibreboard is more common in Europe and is not often seen on our side of the pond. Mark provided specs to the building inspector and explained it to him. We’re fortunate to have an experienced and open-minded official. But there’s no doubt to anyone walking through or around our house that it’s a well-built, thoroughly considered house.

zehnder hrv unboxing
zehnder hrv

And back to the mechanical room. Hans from Pinwheel Builds met with Mark and dropped off our new Zehnder HRV and heat exchanger along with coils of flexible plastic pipes, which are to be our house’s air ducts for circulating what little heat we require. It’s a pretty groovy system. We won’t have any gross floor ducts, bulkheads or metal work in our house. All you’ll see are small 8” diameter circles mounted to the occasional wall and ceiling to circulate air. Mark went over his plan with Hans and has started installing the ducting himself. Unboxing the parts was better than Christmas for Mark. He was so excited.

parapet roof

parapet roof

new carhartts

new carhartts

From here on out, Mark will be spending as much time as possible working on the house himself. He bought himself a spiffy new pair of Carhartt overalls for the task ;) In addition to starting the ducting, he finished the parapet (a fancy word for structural railing) on our flat roof, cleaned up the front and back yards, and hosted another tour. This last one saw around 30 people who joined as guest of Malcolm Isaacs, who runs the local Passive House courses and is a director of the Canadian Passive House Institute.

brown ash cabinets

brown ash cabinets

ash and gloss white

On the backend, we ordered our kitchen. Another hooray! Finally. There were a few back-and-forths during the homestretch, which prolonged the process, but were key for getting the details ironed out. We’re really excited about it. We ended up going with Astro Design Centre and have had a great experience working with Dean Large. He ‘gets’ us, in terms of design, and was able to add real value to our design experience, which we really appreciated. Astro also had the finishes we liked the most, at the best price. For example, a gloss white was the same cost as a matte white (typically gloss costs more). And we don’t want any hardware, we want recessed handles (a no hardware look typically costs more). We went with the Astro house brand in white gloss for all the cabinets except those on the backside of the island. The backside of the island faces the living area. For these cabinets we chose a sand-blasted (i.e. textured) brown ash. Haven’t ordered our countertops yet. That’s next.

Following suit, we made a decision on our wood flooring and placed the order. We’ve decided to go with white ash from the Wood Source. The same white ash that the city of Ottawa has felled throughout the city to thwart the Emerald Ash Borer. It will be sympathetic to the island wood. We also decided to order some extra wood for the sloped ceiling, which spans our open space, over the master bedroom and loft. A slatted wood ceiling will allow for clever lighting hacks. We’ll be able to hide much of the hardware behind the wood so that we only see what we want to see and can get away with using less expensive fixtures at no aesthetic compromise. It will also look incredibly beautiful. It’s a win-win.

As alluded to earlier, the house is buzzing again this week. Siding has begun amongst other exciting things. Do stay tuned and lookout for another Mark Periscope. He broadcast just today. And hope you’ll join the next house tour!

Construction week 32 — plumbing and ventilation runs

First family picnic on our rooftop patio. Shared it with some friendly pigeons who decided our new home was also their new home.

First family picnic on our rooftop patio. Shared it with some friendly pigeons who decided our new home was also their new home.

Hope you enjoyed last week’s videos. I sure did. Gave me a break from writing. Writer, I am not. Here goes again:

It’s been a couple weeks since my last construction update. We sent the Cornelis Grey crew away last week. We’ll be bringing them back in a few weeks, once we have more work for them. In the meantime, our plumber Nathan from Ackland plumbing, has begun his rough-in work. He's installing a manifold system? It's cool, or so I am told. And Mark, as you may have seen via Periscope, has begun our ventilation layout.

We walked through the house with our electrician, Yves from Portage Electric, to get a feel for our electrical plan in real life. Wow. When you’re lucky enough to be in a position to decide where to put a switch, and what turns on what, you realize what great ‘power’ you have. And what a massive effect the electrical details potentially have on the user experience and enjoyment of a space. It would really suck to be searching around for a switch that was un-intuitively placed. Or if an unsightly 6-switch was in the middle of a feature wall. What makes sense on paper does not always translate when you’re physically walking through a space.

It also forced us to consider what sort of ‘smart’ lighting/electrical systems we might want to consider. I love the idea of walking into a space and having the lights automagically turn themselves on. Imagine no wall switches? Or lights that learn our behaviour. Will these technologies date our house vs. a tried-and-true analog wall switch? As a happy, budget-friendly medium, we’re looking into Lutron’s Caséta system

And do we need “cat 5” cable for our internet? If we want to watch Netflix really really fast? I was under the assumption that regular ol’ wifi would suffice for our entire home, but now that the question has been raised, do I want it? Do I need “cat 6” to future-proof? Our neighbours building up the street included some empty PVC pipe behind their walls, for easy wiring access, should they require something they forgot or doesn’t exist yet. I’m going to lean towards less wires = good, whether or not that’s proves to be true. Time will tell.

There are a lot of moving parts that need to come together over the next few weeks, starting with the plumbing, which will carry on for much of this week. Then ventilation followed by electrical. Yves helped us to understand that his job becomes much simpler if he can reuse or follow some of the previous installs. The bigs rocks go in first, then it's easier to fill the gaps with the sand. Or something like that...Once those inside jobs are all finished, we get to cover up those walls with drywall. We’re flying Mark’s brother in from Nelson BC to help us out with the drywalling. He’s a pro, and a Rosen, so it’s bound to be good :) Only 3 weeks away!

We're still placing orders and making decisions on the back-end. We are so frustratingly close to ordering our kitchen. There have been quite a few back-and-forths to nail it down. All of our siding material has been ordered and work is set to begin next week. Really looking forward to that getting under way. 

Mark’s sporadically giving tours of the house to various groups. He loves doing them, even though it’s a time-suck. We’ll be setting up another public tour some time in the next couple weeks, likely on a weekend. You’ll be able to see what’s running through our walls before we cover them up. We will post the time and date later this week.

One last thing: it’s spring! With the warmer weather, it now feels relatively cooler when I walk inside the house. Neat-o. Same principles apply to cool our house as it does to heat it. We enjoyed our first picnic of the season out on our rooftop deck. Fealt great.

A tour of students from Algonquin College studying architectural technology. And a view of our messy post-winter construction front yard.

A tour of students from Algonquin College studying architectural technology. And a view of our messy post-winter construction front yard.

My wee ones staring out the sitting window #milwaukee

My wee ones staring out the sitting window #milwaukee

Preliminary air test results on our Passive House

Before any of our electrical and plumbing work begins, we did a blower door test. This tests to see how air-tight our house is. The test we did was only a preliminary blower door test to ensure that our walls are on track to hit the target, even though not all of our windows and doors are completely sealed yet. We did some temporary taping in a few locations in order to perform the test. We also only performed a depressurization test this time (PassivHaus requires both a depressurization and pressurization test). This is because the temporary taping would have failed under pressurization.

The PassivHaus Standard requires an air tightness of 0.6 ACH50 or better. ACH50 stands for Air Changes per Hour at 50 Pascals of pressure, or the total number of times that the entire volume of air in the house will be exchanged through leakage at a given pressure. 50 Pascals is roughly 5 times the pressure that a house would experience on a cold winter day due to difference in temperatures between the inside and outside, so the test ensures that performance at everyday pressures will be ensured.

The results? We achieved 0.47 ACH50 on the first try!! We are very happy with this result. We will retest the house after the last few windows are completely installed to see how we can bring this result down even lower. The lower this number gets, the smaller and more effective our heating and ventilation system can be.

Early results predictions/friendly wagers. Here's hoping we reach Mark's 0.18 with the final.

Early results predictions/friendly wagers. Here's hoping we reach Mark's 0.18 with the final.