How to Address Drafts in Granny Flats for Better Insulation


Granny flats are a popular choice for many families looking to keep their loved ones close while providing them with a sense of privacy and independence. However, these cozy living spaces often face unique challenges, especially when it comes to insulation and preventing drafts. A drafty environment can not only cause discomfort but also lead to high energy bills as heating or cooling systems work overtime.
With Australia’s diverse climate, ensuring that your granny flat stays warm in winter and cool in summer is crucial. Proper insulation plays a vital role in achieving this balance. By understanding and addressing the sources of drafts, you can enhance both comfort and energy efficiency, making your granny flat a more pleasant place to live year-round.
Identifying Common Sources of Drafts
Drafts can sneak into a granny flat from various places, subtly affecting the temperature and comfort of the home. Here are some usual suspects where drafts may be entering the granny flat:
– Windows: Often, ill-fitting windows allow air to pass through. Even a few millimeters of slack can let in a surprising amount of cold air in winter or hot air in summer.
– Doors: Check around the frame and underneath. Doors that haven’t been properly sealed can act as a significant path for unwanted drafts.
– Structural Gaps: Look for gaps between floorboards, around chimneys, or where walls meet the ceiling. These can be less obvious but contribute to the problem.
To pinpoint these sneaky culprits, consider using the candle test. Simply light a candle and move it slowly along suspected areas. If the flame wavers, you might have found a draft source. This easy method can save you a lot of guesswork and help you target specific areas needing attention.
Effective Insulation Solutions
Now that you know where drafts are likely coming in, it’s time to tackle them head-on. Choosing the right insulation for your granny flat is the first step in keeping it warm or cool as needed. Here are a few options you might consider:
– Foam Insulation: This type is great for filling gaps and cracks. It’s especially useful for small spaces where drafts tend to sneak in.
– Fiberglass Insulation: Often used in walls and ceilings, fiberglass is an effective way to cover larger areas. It’s typically easy to install and helps maintain a consistent temperature.
– Reflective Barriers: Particularly good for reflecting heat, these barriers can prevent external heat from entering while keeping internal warmth from escaping.
Improving the seals around windows and doors can make a huge difference. Here’s a simple guide on how to do it:
1. Install Door Sweeps: Place them at the bottom of exterior doors to prevent air from passing underneath.
2. Apply Weather Stripping: Use it around windows and doors to create a tight seal. It’s easy to apply and removes without damaging surfaces.
3. Double-Glaze Windows: Add another pane to your windows to reduce heat transfer. This can be especially effective in both winter and summer.
These solutions not only help in locking out drafts but also contribute significantly to making your granny flat more efficient, leading to potential savings on energy bills over time.
Additional Tips for Better Insulation
Beyond insulation, there are other simple tips you can implement to further enhance your granny flat’s comfort.
– Heavy Curtains: Using thick curtains can act as an additional barrier against cold and heat. They help trap air between the fabric and window, minimizing drafts.
– Door Snakes: Placing these fabric tubes at the bottom of doors can block air from seeping in.
These measures, though simple, are effective in enhancing insulation. It’s wise to regularly check and maintain your insulation efforts. This not only ensures they remain effective but also helps identify any new problem areas early.
Creating a Comfortable Space for Grannies
Addressing drafts is about creating a cozy, energy-efficient environment. By implementing effective insulation and practical tips, you’re not just keeping energy costs down; you’re enhancing the overall quality of living in the granny flat. A well-insulated space means a more comfortable experience for those living there, no matter the season.
Think of these changes as investing in the comfort and happiness of the family members who might call these spaces home. A bit of effort today can make a world of difference for the grannies tomorrow.
Ready to make your granny flat the perfect haven for your loved ones? Trust Perway Construction Services to bring warmth and comfort through quality insulation and expert craftsmanship. Learn more about how we can help by exploring our range of flats for grannies and take the first step toward a more comfortable and efficient home.


Andy is the Director and Registered Builder for Perway Construction Services. He commenced his career in the construction industry almost 20 years ago as a Carpenter. He offers clients his specialized advice and knowledge on their project, what’s best for their long term return on investment and how to achieve their home renovation dreams. He leads his team of tradespeople to complete successful, quality home renovations.