--- title: FAQs date: 2025-05-26T13:02:00+10:00 author: "webmaster@walkerdesigns.com.au" canonical_url: "https://sprayfoamsolutionstas.com/faqs" section: Site Content --- ![Shutterstock 2467354861](https://sprayfoamsolutionstas.com/volumes/images/Applications/_2000xAUTO_crop_center-center_none/5468/shutterstock_2467354861.webp) 1. [ Home ](https://sprayfoamsolutionstas.com/) 2. FAQs # FAQs ## General Questions What exactly is spray foam insulation? Spray foam insulation is a liquid mixture of two chemicals (isocyanate and polyol resin) that are combined at the tip of a spray gun. When sprayed, this mixture rapidly expands and hardens into a rigid or semi-rigid foam, creating a highly effective insulating and air-sealing barrier. How is spray foam different from traditional insulation (e.g., fiberglass, cellulose)? The key difference is its application and resulting properties. Spray foam is applied as a liquid that expands to fill every void, creating a continuous, monolithic, and airtight seal. Traditional insulation materials are pre-formed and don't inherently stop air leakage, often leaving gaps that compromise their effectiveness. Closed-cell spray foam also acts as a moisture barrier, which traditional options don't. What are the main benefits of using spray foam insulation? - **Superior Energy Efficiency:** Achieves excellent R-values and, crucially, creates an airtight seal, significantly reducing heating and cooling costs. - **Airtightness:** Eliminates drafts and uncontrolled air infiltration, leading to more stable indoor temperatures. - **Moisture Control:** Closed-cell foam acts as a vapor barrier, preventing condensation, mold, and rot. - **Structural Reinforcement:** Closed-cell foam adds rigidity to walls and roofs. - **Noise Reduction:** Dampens sound transmission, creating a quieter environment. - **Pest Deterrent:** Its dense structure discourages pests. - **Longevity:** Does not settle, sag, or degrade over time, lasting the life of the building. - **Improved Indoor Air Quality:** Reduces the infiltration of allergens, dust, and pollutants. Where can spray foam insulation be used? It's versatile and can be applied in various areas including: - Walls (interior and exterior) - Attics (underside of roof deck or attic floor) - Crawl spaces and subfloors - Rim joists - Shipping containers - Sheds, warehouses, and other commercial/industrial buildings ## Types of Spray Foam What's the difference between open-cell and closed-cell spray foam? - **Open-Cell:** Softer, less dense, spongy texture. R-value around R-3.5 to R-4 per/m. Excellent air barrier but is vapor permeable (allows some moisture vapor through). Great for sound dampening. Generally less expensive. - **Closed-Cell:** Denser, more rigid, hard texture. R-value around R-6 to R-7 per/m. Acts as both an air barrier and a vapor barrier. Adds structural strength. More resistant to water absorption. Generally more expensive. Which type of spray foam is best for my project in Tasmania? The best choice depends on the specific application: - **Exterior Walls/Underfloor/Crawl Spaces/Shipping Containers (where moisture and structural integrity are key):** Closed-cell is often preferred due to its vapor barrier properties, higher R-value in thinner applications, and structural benefits. - **Interior Walls (for soundproofing):** Open-cell is excellent for noise reduction. ## Health & Safety Is spray foam insulation safe? Yes, when installed correctly by trained professionals, spray foam is safe. The chemicals react and cure rapidly, forming an inert polymer. What about "off-gassing" and chemical smells? Any strong or persistent odor after the recommended re-occupancy period indicates improper installation (e.g., incorrect mixing, incomplete curing). This is why hiring certified professionals is critical. Properly applied foam should be odorless once cured. Does spray foam contain formaldehyde or phthalates? Reputable modern spray foam products **do not contain formaldehyde or phthalates**. There's often confusion with older insulation types or other building materials. Is spray foam insulation fire-safe? Modern spray foam products contain fire retardants and are tested to meet relevant building codes for fire safety. They typically self-extinguish when the flame source is removed. However, they must be covered by an appropriate fire-rated thermal barrier (e.g., plasterboard) as per building codes. ## Installation and Cost Can I install spray foam insulation myself? **It is strongly not recommended for DIY.** Spray foam application requires specialised equipment for precise mixing and heating of the two chemical components, as well as extensive safety protocols and knowledge of building science. Incorrect mixing or application can lead to health hazards, poor performance, and costly damage. Always hire certified professionals. How long does spray foam installation take? Most residential projects can be completed within a day or two, depending on the size and complexity of the area being insulated. The foam cures very quickly (minutes to hours). How much does spray foam insulation cost? Pricing starts from $40 per m2 but will depend on thickness and other factors throughout the project. Will spray foam bow my walls? With proper installation, no. While closed-cell foam expands powerfully, experienced installers control the application to prevent excessive expansion that could bow walls. Ensuring walls are properly constructed (glued and screwed) also helps. What if I have existing insulation? For walls, existing insulation usually needs to be removed for spray foam to be effective. For attics, sometimes spray foam can be applied over existing insulation, but it's often more effective to remove old, settled, or damaged insulation first. Your installer will advise. What about future electrical or plumbing work? Because spray foam adheres so tightly and forms a solid mass, accessing pipes or wires embedded within it can be more challenging than with batt insulation. However, it's not impossible; it typically requires cutting out sections of the foam for access, which can then be repaired. This is a trade-off for the superior performance. ## Performance and Regulations (Tasmania Specific) What R-value should I aim for in Tasmania? The National Construction Code (NCC) specifies minimum "Total R-values" for different building elements (walls, roofs, floors) based on climate zones. Tasmania generally falls into cooler climate zones, requiring higher R-values. For example, external walls in Tasmania often require a **Total R-value of at least R2.8**. A reputable local installer will be knowledgeable about the specific NCC requirements for your project's location and type. Does spray foam attract or deter termites in Australia? Spray foam itself is not a food source for termites. However, it can potentially conceal termite activity by making it harder to see their mudding or tunnels. In areas prone to termites (like many parts of Australia), it's crucial to combine spray foam insulation with robust termite management strategies, such as regular professional inspections and appropriate chemical barriers or physical barriers around the foundation. Discuss this with your pest control professional and builder. Are there any government rebates or schemes for insulation in Tasmania? Yes, Tasmania has initiatives like the **Energy Saver Loan Scheme (ESLS)**, which offers zero-interest loans for energy efficiency upgrades, including insulation. It's worth checking with the scheme administrators or your chosen spray foam installer to see if your project qualifies. How long does spray foam insulation last? Once properly installed and cured, spray foam is highly durable and inert. It does not sag, settle, or degrade. It is expected to last for the lifetime of the building it's installed in, often 50-80 years or more, without losing its effectiveness.