If you’re considering transforming the unused space below ground into a valuable extra room for hobbies, study, or relaxation, you’ll find plenty of basement remodeling ideas to inspire you. A key factor to ensure is that the space remains warm and cozy. During the planning stage, it’s important to explore heating options for the basement that don’t rely on electric space heaters.
However, your efforts will be wasted if you don’t address the typical damp issues associated with rooms surrounded by earth. Insulating to prevent heat loss is crucial, but it’s essential to avoid moisture-prone insulation. For instance, fiberglass is not advised. Although it’s cost-effective above ground, it absorbs moisture, leading to mold growth—an issue, particularly for porous materials like drywall. The resulting brown or black stains are not only unsightly but also pose health risks.
Let’s explore how to avoid moisture-prone insulation during your basement renovation. We need to consider what type of insulation is suitable, whether it’s appropriate for DIY installation, and if there are additional steps to ensure your basement renovation remains moisture-free.
Waterproofing your basement walls is a great place to start
Basement walls are typically made from concrete blocks or poured concrete slabs. Any cracks present are potential entry points for moisture. A critical step in finishing basement walls is sealing these leaks. This can be achieved using hydraulic cement like Drylok Fast Plug, which is ready to use and sets quickly.
While many people proceed to install a wooden framework, insulation, and drywall, there’s an option for those willing to invest a bit more time and money for lasting protection and comfort. Consider applying a complete waterproof coating to the basement walls. Liquid Rubber Basement and Foundation Repair Sealant is water-based, easy to apply, non-toxic, and offers some flexibility to prevent cracking, flaking, or peeling.
If your basement has windows, check the area where the frame meets the wall for gaps. Seal any gaps with caulk to prevent water and cold air from entering and reduce condensation. If the window is single-glazed, you may want to upgrade to a more energy-efficient double-glazed option.
Choosing and fitting insulation that isn’t moisture-prone
For basement insulation that doesn’t encounter the same moisture issues as fiberglass, two main options are available: expanded polystyrene (XPS) boards and spray foam insulation, which consists of polyurethane and isocyanate that hardens as it dries.
Both options offer high R-values, which measure insulation performance. XPS boards are lightweight and can be easily cut with a utility knife using a score-and-snap method, making them ideal for DIY projects. However, spray foam insulation is not as straightforward. While products like Loctite Tite Foam Big Gap Spray Foam are suitable for small areas, they aren’t practical for insulating an entire basement. Spray foam can be difficult to handle, and some types contain toxic chemicals, making professional installation advisable despite potentially increasing renovation costs.
