Why Building Science Matters (More Than What You Can See)

By Peter Paauw, President Slokker Homes

Last weekend, I was driving to Aspen Spring to visit a show home with my wife. As often happens, a casual conversation turned into a serious discussion about real estate, construction quality, and what truly makes a building stand the test of time.

My wife is an interior designer. I’m an engineer. Between the two of us, we’ve spent decades in the homebuilding industry. I’ve been leading Slokker Homes since 2004, delivering residential projects that are meant to last—not just look good on day one. So when she and I talk about buildings, it’s not theoretical.

She said something I hear a lot, especially in markets like Vancouver: “I would never buy a new unit in a new building. Construction quality is too questionable. I’d rather buy in an older building with a long strata¹ history.”

It’s a fair concern. Older buildings feel safer because the issues are known—or at least documented. But my response was equally direct: “With older buildings, you often don’t know what problems are coming. The strata1  may not even be aware of them yet.”

Envelope failures. Plumbing replacements. Roof systems reaching end of life. These are not small-ticket items, and they don’t reveal themselves early.

We agreed on one thing quickly: it’s very easy to spot superficial deficiencies. A loose doorknob. A misaligned hinge. An appliance that fails earlier than expected. These things shouldn’t happen and when they do, they’re annoying but they’re visible, fixable, and usually covered by warranty. At Slokker Homes, we back these items with strong warranty programs, including five-year coverage where applicable.

What’s far more important and far harder for buyers to evaluate—is what’s behind the walls.

That’s where building science matters.

Take rain-screen designs, for example. As a Dutch immigrant, you could say managing water is in my DNA—I come from a culture with centuries of experience mastering water. While rain screens aren't mandated by the Alberta Building Code, Slokker Homes views them as essential. We apply that generational expertise to every build, selecting and installing systems that go well beyond provincial requirements to protect what you can’t see.

Keene Driwall Rainscreen Installation. Credit: Capital Forest Products

You will never notice the small amount of water that inevitably gets behind exterior cladding. Wind pressure will find a way to push moisture in—it always does. Without proper drainage and drying pathways we build in, that moisture sits against plywood or particle board. You won’t see the damage in year one, or year five. But over ten or fifteen years, it quietly rots the structure. Good building science doesn’t pretend water won’t get in; it focuses on getting it out and drying the assembly as quickly as possible.

Plumbing is another invisible risk, often overlooked yet part of a home's longevity. We consciously choose to invest in durable systems like Uponor because of their long-term reliability. While there are various materials available on the market, we prefer a more robust system to mitigate the risk of "creeping" failures. A pinhole leak in a hard-to-access area can result in massive repair costs, insurance claims, and rising premiums. These costs eventually show up in strata fees.

Roofs follow the same pattern. A roofing system might pass its seven-year warranty without issue, but that doesn’t mean it is designed to last 20, 30, or 40 years without major intervention. When roofs, envelopes, and plumbing all start failing earlier than expected, the reserve fund²  takes a hit, and so do owners.

This is where the math becomes very real.

Buildings that are designed with proper building science can operate 10–15% below average condo fee’s over the long term trickling down to lower maintenance, fewer emergency repairs, better insurance profiles, more stable reserve funds. With a proactive council and fewer surprise expenses, reserve funds can actually grow in real terms instead of constantly playing catch-up with inflation.

This level of fiscal health and the peace of mind that comes with it, is the result of intentional design and the quiet, behind-the-scenes work we put into the parts of a home you’ll never see. We focus on these hidden details because we know they are what truly protect your investment from the inside out.

At Slokker Homes, we don’t disappear after handover. In the early years, we actively advise condo boards on how to operate and maintain the building properly, helping stabilize operations and avoid unnecessary costs. You may not see it in the showroom—but you’ll feel it years later in lower fees, fewer assessments, and a building that simply performs better.

I may focus more on drainage planes and plumbing specs than on the latest design trends, but that’s because I want your home to last. Whether it’s the Dutch influence or the engineering mindset, I believe that if you take care of the fundamentals behind the walls, the building will take care of the people inside it. At Slokker Homes we don't just build for the present; we build for a future where your home remains as solid as the day you moved in.

1  Strata: A type of property ownership where you own a private unit (like an apartment or townhouse) within a larger building or complex, while also sharing ownership and costs for common areas like land, roofs, pools, and hallways, managed by a strata corporation.

2  A strata contingency reserve fund (CRF) is a mandatory, legally required savings account used for non-operating, long-term, or infrequent repairs (e.g., roofs, elevators, paving) and major, unexpected expenses.