Underslab Insulation for Suspended Concrete Slabs
Insulation Under Concrete Slabs To Tackle Heat Loss, Heat Gain and Condensation Control
Polyurethane foam insulation is the best option for underslab insulation for suspended concrete slabs.
The underside of suspended Concrete slabs need to be insulated for various reasons, mainly energy efficiency and condensation control.
Insulation beneath a conditioned space is now a mandatory requirement under Section J of the Building code of Australia. Many basement carparks are built below residential units or ‘conditioned spaces’. To maintain compliance with the BCA, these slabs need to be insulated. Sprayfoam applied to the soffit of the basement slab is an ideal way to insulate in these cases.
In cases where a cool room or cold case has been built on a suspended slab, insulating the underside of the slab is essential to prevent condensation from occurring on the underside of the slab. This is part of the standard specification for Coles, Woolworths and others. If the cool room floor is insulated and heater pads installed, spray foam is still often installed to guarantee the prevention of condensation should the heater pads fail.
The World’s Most Effective Insulation
We believe polyurethane is the most effective material for the purpose of under slab insulation:
It forms a seamless airtight barrier without thermal bridging.
It insulates against heat and cold better than any other commercially-available insulation material (measured by R-value).
It holds its shape and won’t deteriorate over time as other insulation materials do.
Read more about why you should choose polyurethane insulation for concrete slab insulation.
Who We Are
Foamed Insulations is a leading Australian under slab insulation Sydney provider and on-site contractor with over 40 years’ experience in commercial, industrial, rural and residential insulation. Our experienced team ensures your insulation is installed with market-leading expertise.
Book an Under Slab Inspection and Fix Condensation For Good!
Our team installs fit for-purpose under slab insulation and under concrete slab insulation systems that stop heat loss and reduce moisture risks. Contact Foamed Insulations for a straightforward site appraisal from experienced insulation contractors across Sydney – we’ll give you a clear recommendation and a fixed-price quote, and all our work is guaranteed.
Call us for insulation under concrete slabs today.
Contact us for more information: 02 9898 0751
Underslab Insulation – FAQs
What is under slab insulation and why would I need it?
Under slab insulation is a thermal layer placed beneath a slab to reduce heat transfer through the concrete. It’s used to control energy loss, prevent cold floors, and reduce the risk of slab-edge condensation, especially important in cold-storage rooms, apartments and energy-rated builds. Where underfloor upgrades are required our spray foam underfloor insulation and pre-insulated pipe supplier team is here to complete a whole-building solution for you.
Can you install insulation under concrete slab on existing builds?
Yes, there are several practical approaches depending on site access and the slab detail. We assess the job and specify the best under concrete slab insulation method.
Will under slab foam insulation prevent condensation under the slab?
Properly specified under slab foam insulation for condensation control reduces the temperature differential that causes moisture to form on concrete. Closed-cell foam systems form a durable thermal break and, when combined with correct detailing, eliminate condensation on the surface. We’ll detail the solution that suits your slab design and vapour control requirements.
Do you handle commercial under slab projects?
Yes, we regularly provide commercial spray foam insulation work for warehouses, cold stores and multi-residential buildings. Our experienced Sydney-based crew manage the site, coordinate with builders and provide documentation so the installation meets code and performance expectations.
