Polymax R2.5 Underfloor Insulation adds a proper thermal layer beneath your floorboards, helping keep warmth in during winter, slow heat coming up in summer, and reduce the draughts, dust and smells that sneak through uninsulated floors.  Made from non-itch, people-friendly polyester, Polymax is safe to handle and designed to sit snugly between timber floor joists.

Built for Victorian Homes:
❄️ Keeps timber floors warmer in winter
☀️ Helps slow summer heat from below
💨 Helps reduce underfloor draughts
🧹 Helps reduce dust, smells and subfloor air sneaking up
🔇 Helps soften noise through the floor

Smart Buyers Love It:
✅ R2.5 thermal performance
✅ Available in 430mm and 450mm widths
✅ Made from 100% polyester with up to 80% recycled content
✅ No itch, no loose fibres, no glass splinters
✅ Australian made with 70-year product warranty
✅ Pickup at Preston or delivered to Melbourne 
✅ Regional Victorian delivery available by quote
✅ DIY-friendly — step-by-step, easy-to-follow videos
✅ Comprehensive support available online, phone and chat

Handy tip: many Melbourne homes have 430mm joist spaces, so the 450mm width is often the right fit. Measure your joist spacing before ordering.