Foreword by Ian Thompson, Editor
What house roofing do you choose for your build? Do you choose for appearance, durability, maintenance, cost, insulative performance, or a combination thereof?
Depending on where you live in the world, or even which town, sometimes there’s a prominent roofing material in use because of tradition or local supply dominance.
I spent a lot of time living in the UK countryside, and my favourite roof style was the thatched roof. But there is a cost to thatching roofs. Although they look amazing, they also attract some unwanted guests (pests), and there is also a fire and insurance risk. Also, if you venture to many other countries like Australia or New Zealand, you won’t find thatched roofs anywhere.
In New Zealand, I see a lot of metal roofs. They used to be really cheap (not since covid) to buy – but for me they are a major pain to install, and any scratch on the surface will rust – and that rust will spread over time. Metal roofs may be more durable, but I just don’t like them because of the noise issues. Standing under a metal roof in the rain is just not pleasant, and unless you have really good soundproofing or another structural layer underneath, like ply, this may be a cause for concern.
My preference for house roofing is asphalt shingles, and they may not last as long, but they are easy to replace, and look great – to me, anyway. There are so many choices nowadays for roof finishes: slate, fake slate, clay tiles, even incorporated solar panels that cover the entire roof. But consider this: the roof is the hat of your house. It is usually visible, and a cheap-looking roof looks just that – cheap. I’m not saying to buy an expensive roof; just make sure the colour and appearance work with your surroundings and your community, or your house may stand out like a sore thumb.
For cost considerations, please remember to consider both the cost to purchase and the cost to install. Different products vary considerably in installation cost.
Now, let’s turn to Matt’s own house-building project and learn why he also chose asphalt shingles, and learn the details of his roof support structure he built to withstand the elements.
The Risinger Build: Episode 14 – House Roofing
Choosing the Right Roofing Material for Your New Home – Considerations
So, you’re embarking on the exciting journey of building a new house, and one of the big decisions on your plate is choosing the right house roofing material. It’s a choice that impacts not just the look of your home, but also its durability, energy efficiency, and maintenance needs over time. Let’s dive into the merits of different roofing options to help you make an informed decision.
Asphalt Shingles: The Reliable Staple
Why Consider Them?
Asphalt shingles are like the dependable friend who’s always there when you need them. They’re one of the most popular house roofing materials in America, and for good reason.
Benefits:
- Cost-Effective: They’re generally less expensive than materials like metal, clay tiles, or slate.
- Versatile Aesthetics: Available in various colours and styles, they can match virtually any home design and look great and luxurious.
- Impact Resistance: High-quality options, like Atlas Pinnacle Impact-Resistant shingles, offer enhanced protection against hail and severe weather.
- Insurance Perks: Using impact-resistant shingles can qualify you for discounts on your homeowner’s insurance.
- Strong Warranties: When you use all the manufacturer’s components (underlayment, starter shingles, ridge vents, ridge caps), you can get extended warranties—sometimes 15 years non-prorated for materials and labor, transferable to a second owner.
Considerations:
- Heat Sensitivity: They can degrade under high temperatures, so proper ventilation is key to extending their lifespan.
- Maintenance Around Penetrations: You’ll need to keep an eye on areas around vents, chimneys, and skylights to prevent leaks.
- Environmental Impact: They’re petroleum-based, which might not be the most eco-friendly choice.
Metal Roofing: Modern and Durable
Is It Right for You?
Metal roofs are gaining popularity, offering a sleek, contemporary look. If you’re in a place like New Zealand, you’ll see them ‘almost’ everywhere.
Benefits:
- Longevity: They can last anywhere from 40 to 70 years.
- Durability: Excellent resistance to fire, mildew, insects, and rot.
- Energy Efficiency: Reflect solar radiant heat, which can reduce cooling costs.
- Low Maintenance: Generally requires less upkeep over its lifespan.
Considerations:
- Higher Upfront Cost: Metal roofs are more expensive initially than asphalt shingles.
- Noise Factor: Can be noisier during rain or hailstorms unless you have good insulation.
- Installation Complexity: Requires specialized skills, which might increase labour costs.
- Thermal Movement: Metal expands and contracts with temperature changes, potentially affecting integrity over time.
Clay and Concrete Tiles: Timeless Elegance
Why They Might Appeal to You
If you’re going for a Mediterranean or Spanish-style look, clay and concrete tiles offer that classic elegance.
Benefits:
- Long Lifespan: With proper maintenance, they can last over 50 years.
- Weather Resistant: Excellent at withstanding extreme weather, including high winds and hail.
- Distinctive Aesthetics: They give your home a unique and upscale appearance.
Considerations:
- Heavy Weight: They’re significantly heavier than other materials and may require additional structural support.
- Higher Cost: Both the materials and the specialized installation can be pricey.
- Fragility: While durable, the tiles can be brittle and may break if walked on.
- Need for Expertise: You’ll need skilled professionals experienced with tile roofing.
Key Installation and Design Factors to Keep in Mind
Ventilation Is Vital
Proper roof ventilation extends the life of your house roofing material, especially for asphalt shingles. An over-roof ventilation system, like the one Matt used in his project, creates an air gap between the insulation and the roof sheathing. This helps dissipate heat and moisture, keeping your roof cooler and your shingles from degrading prematurely.
Underlayment Matters
A full peel-and-stick underlayment acts as a secondary barrier against water intrusion. It’s particularly important in areas prone to severe weather, like high winds or hailstorms. This layer seals the roof deck, offering an extra line of defence if your outer house roofing material gets damaged.
Roof Pitch and other Considerations
A roof pitch between 5:12 and 7:12 is often ideal. It offers a sweet spot that:
- Provides Attic Space: Sufficient room for mechanical systems like HVAC (especially important if you’re building slab-on-grade).
- Ensures Safety: Easier and safer for roof access during maintenance or inspections.
- Balances Costs: Steeper roofs require more materials and labor, increasing costs.
- Minimize Roof Penetrations
Every hole in your roof is a potential leak waiting to happen. Keep penetrations to a minimum and place necessary ones like vents or skylights strategically, preferably on less visible or less weather-exposed sides of the roof. - Use High-Quality Flashings: Lead pipe flashings are more durable and long-lasting compared to neoprene or rubber options. They resist UV degradation and are worth the extra cost for peace of mind.
Skylights: Beauty Meets Function
Skylights can transform your interior spaces with natural light but can be a source of leaks if not installed properly.
Opt for Curb-Mounted Skylights: These are raised above the roof plane, reducing the risk of leaks. They can also be replaced without disturbing the surrounding house roofing materials.
Proper Flashing Is Non-Negotiable: Use custom metal flashing that’s soldered at the corners to ensure a watertight seal.
Don’t Skimp on Flashing Details
Proper flashing around roof edges, valleys, and where the roof meets walls is crucial.
- Kick-Out Flashings: These help direct water away from siding and prevent moisture intrusion.
- Sidewall and Headwall Flashings: Custom-fabricated metal flashings provide superior protection compared to standard options.
Timing Is Everything in Construction
Coordinate the installation of your roof with other trades. It’s best to have exterior work like siding and painting done before the roofing goes on. This prevents damage to your new roof from other construction activities.
Maintenance Isn’t Optional
Regular inspections and maintenance can catch small issues before they become big problems.
Annual Checks: Especially after severe weather, examine your roof for any signs of damage.
Keep It Clean: Remove debris like leaves and branches that can trap moisture and lead to leaks.
Partnering with the Right Professionals
Avoid cowboys, choose experienced, reputable contractors is just as important as selecting the right house roofing material. They ensure:
- Quality Installation: Proper techniques that comply with warranty requirements.
- Long-Term Savings: Fewer mistakes mean fewer costly repairs down the line.
- Peace of Mind: Knowing your roof is built to last.
House Roofing Final Thoughts
Selecting the right house roofing material is a balance of aesthetics, functionality, and budget. Here are some closing tips:
Know Your Warranties and Insurance Benefits: Certain materials can lower your homeowners insurance premiums or come with better warranties.
Remember, your roof is your home’s first line of defense against the elements. Investing time and resources into making the right choice will pay off with a beautiful, durable roof that protects your home for years to come.
Understand Your Climate: If you’re in a hail-prone area, impact-resistant materials are a smart choice.
Assess Structural Needs: Make sure your home’s structure can support the weight of your chosen material.
Consider Long-Term Costs: Sometimes spending a bit more upfront saves money over time due to durability and lower maintenance needs.
Slate Roofing: The Ultimate in Longevity
Is Slate Worth the Investment?
Slate roofs are the granddaddy of house roofing materials – long-lasting and undeniably beautiful.
Benefits:
- Exceptional Longevity: Can last 75 to 100 years or more.
- Natural Beauty: Offers a high-end, natural appearance with unique texture and color variations.
- Fire Resistance: Being non-combustible adds an extra layer of safety.
Considerations:
- Very Heavy: Your home must be able to support the weight, possibly requiring structural reinforcement.
- Highest Cost: Both materials and installation are among the most expensive.
- Specialized Installation Needed: Not all roofers have the expertise required for slate.
- Fragility: Slate can be brittle; walking on it can cause damage.
Synthetic House Roofing Materials: The Modern Alternative
Thinking Outside the Box
Synthetic materials like synthetic slate or shake offer the look of natural materials without some of the drawbacks.
Benefits:
- Cost-Effective Alternative: Less expensive than natural slate or wood shakes.
- Durable: Designed to resist impact, fire, and harsh weather conditions.
- Lightweight: Easier to install without needing extra structural support.
Considerations:
- Aesthetic Differences: May not perfectly replicate natural materials.
- Quality Variation: There’s a wide range of quality and durability among different products.
- Environmental Impact: Some synthetics aren’t recyclable, so consider their ecological footprint.
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