Subfloor Ventilation Installation in Cremorne — Solving Moisture in Sandstone Foundations

Today’s installation in Cremorne showcased why ducted mechanical subfloor ventilation is essential in homes built on sandstone. Like many properties across Cremorne, Neutral Bay, and Mosman, this home had segmented sandstone foundations that trap moisture and restrict natural crossflow ventilation. Our team installed three Australian-made AC motor centrifugal fans with German ebm-papst motors, creating reliable, targeted extraction to move stale, damp air out and draw fresher, drier air in.

Why Sandstone Foundations Need Ducted Subfloor Ventilation

Sandstone is beautiful, but it holds moisture and subfloors are often divided into many small compartments. This makes “one-spot” wall fans ineffective. A ducted system allows us to:

• Target problem zones (damp corners, dead-air pockets) with multiple extraction points.
• Create controlled crossflow so fresh air is drawn in on one side and expelled on the other.
• Overcome compartmentalisation by running ductwork through sections for even ventilation.
• Reduce mould, odours, and structural moisture for healthier indoor air quality and a drier subfloor.

For this Cremorne project we used three Australian-made centrifugal fans powered by ebm-papst AC motors for proven performance, long life, and quiet operation. The system is set up on timer automated cycles to maintain consistent subfloor dryness without wasted energy.

Today’s Installation — What We Did

• Assessed and mapped the best airflow pathways across multiple sandstone compartments.
• Installed three Australian-made AC centrifugal fans (ebm-papst motors) for reliable extraction.
• Ran UV-stable, correctly sized ductwork to multiple extraction points in the dampest sections.
• Fitted weatherproof external louvres to exhaust moist air outside the building envelope.
• Balanced the system to promote make-up air through passive vents and suitable openings.

The result is a robust, targeted subfloor ventilation system that suits the realities of sandstone foundations around Cremorne, Neutral Bay and Mosman, where segmented subfloors demand more than a single wall fan.

How Much Does Subfloor Ventilation Cost in Sydney?

Every home is different, but a typical two-fan ducted installation in Sydney is usually less than $3,000 (including GST). Larger or more complex sandstone homes with multiple compartments may require additional fans and ducting to ensure proper crossflow and coverage. We’re happy to provide a clear, itemised quote after a quick assessment.

Why Choose Fresh Ventilation

• 15+ years of experience designing and installing subfloor ventilation across Sydney.
• Australian-made components engineered for reliability and performance.
• ebm-papst motors for quiet, efficient, long-life operation.
• In-house, licensed electricians and carpenters who’ve been with us for over a decade.
• Neat, code-compliant installations with correct sizing, proper duct support, and tidy finishes.
• Targeted, ducted design that addresses sandstone segmentation and delivers proven results.

From Cremorne to Neutral Bay and Mosman, we understand local building stock and the moisture challenges common to sandstone foundations. Our systems are designed to be quiet, effective, and built to last.

Need Help with Subfloor Ventilation in Cremorne, Neutral Bay or Mosman?

Get in touch for friendly advice and a fast quote. We’ll assess your subfloor, explain the best layout, and recommend the right number of Australian-made, ebm-papst powered fans and ducted extraction points to keep moisture under control.

Project Images

Frequently Asked Questions

Will a single wall fan fix moisture in sandstone subfloors?

Usually not. Sandstone subfloors are often segmented and need ducted extraction to reach multiple zones and create true crossflow ventilation.

How loud are your fans?

Our Australian-made centrifugal fans with ebm-papst motors are chosen for quiet, efficient operation. We also design the duct layout and fan placement to minimise noise transfer.

Do you provide free quotes?

Yes — we can give an indicative price and then confirm details before proceeding. A typical two-fan system is usually under $3,000 (including GST) in Sydney.

Ready to dry out your sandstone subfloor? Contact Fresh Ventilation today for expert advice and a tailored, ducted solution that works.