Cellulose insulation in Pottsville.

No, and I'd rather tell you straight than sell you something you don't need. A slab-on-ground home — and most of Pottsville Waters, Seabreeze, Koala Beach and Black Rocks are exactly that — sits on earth that stays a fairly steady temperature all year, so the slab actually helps even your house out. Save your money for the ceiling, where it actually counts. If you've got an older high-set timber place up off the ground, that's a different story and underfloor batts are well worth it there.

It absolutely helps, and it's the cheaper fix. The mugginess on this coast — January afternoons sit around 69% humidity — means your house struggles to shed heat after dark, so the air-con ends up running half the night. Blown cellulose fibre insulation seals your ceiling so the cool you've paid for stays in the room instead of leaking up into a hot roof cavity. The air-con then cycles off sooner and works less. Insulate first, and you'll often find you didn't need the bigger unit.

It matters both ways, which is the whole point. Yes, our winters are gentle — but a clear July morning on the Tweed Coast has dropped to zero, and on those mornings a leaky ceiling pours your heat straight out. The same cellulose blanket that keeps the summer heat out of your roof cavity keeps your warmth in (and the cold out) in winter. Cooler in summer, warmer in winter, off the one install — most people fit it in summer and then notice the difference again come July.

Cellulose handles our wet coast better than most products, and here's the clever bit: it's hygroscopic, which means if you ever get a roof leak — and on a coast that cops 1,500-plus millimetres a year, roofs do — the cellulose holds the water in one spot rather than letting it run across the whole ceiling, then dries out and leaves a visible stain so you know exactly where to look. Batts just let the water run free into multiple rooms undetected. It's borate-treated too, so it never grows mould or attracts vermin.

No — more is not always better, despite what you'll get told. It's like sunscreen: past the right amount, extra does nothing useful. For Pottsville, which is NCC Climate Zone 2, the code minimum for a ceiling is about R3.5 added on top of your plasterboard, and that's the level we build your cellulose up to. Pay for more depth than your zone needs and you're just spending money the power bill will never give back. I'll quote you the right number for your roof, not an inflated one.

No, we quote online with a fixed price, and that price doesn't get bumped when we turn up. I've insulated thousands of homes and trained for years, so between your details, your roof type and the photos, I can give you an honest, firm number without dragging out a site visit. The only time we'd come out first is if something genuinely can't be worked out from the information — and that's rare. What I quote is what you pay.

Usually not — and leaving them in saves you money and mess. We can top straight over old batts with about 100mm of blown cellulose, which adds roughly R3.0 over whatever's already up there, fills all the gaps the batts left, and covers the timber joists (which are only about R1.5 on their own). You keep the value of the old batts, and you avoid the cost, the mess and the dump fees of ripping them out. If they're soaked or full of vermin nests, that's when we'd remove them first.

Because installing insulation used to be a trade qualification, and since they dropped that requirement, people have genuinely died doing it — falls and electrical fittings are no joke, especially on the high-set roofs you get around here. There's also the gear: blown cellulose needs about $60,000 of specialised equipment and training to install to the right density, so you can't DIY it properly anyway. And the cheap quote that puts in half the product is the one that 'settles' and gets blamed on the product — like blaming the car when someone put the wrong fuel in. Done right by trained people, you'll never have a problem with your insulation again.