🏗️ High-Density Slabs & Commercial Supply

Looking for Rockwool RW3, RW4, or RW5?
We specialize in supplying high-density acoustic and thermal slabs for specialized projects. Whether you need standard soundproofing or specific fire-rated insulation, we carry the full range.

RW3 (60kg/m³): Ideal for high-performance acoustic partitions.

RW4 (80kg/m³): Heavy-duty thermal and sound insulation.

RW5 (100kg/m³): Maximum density for industrial and fire-stop applications.

Don’t pay retail for bulk orders. Contact our dedicated sales team today for the best trade prices and live lead times on full-pallet quantities.

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Google Reviews ⭐ ⭐ ⭐ ⭐ ⭐

Our clients are repeat customers.

David Robinson

Goods supplied at a very good price. Delivery ahead of time and driver helped stow the boards. Some slight damage from the retaining straps, but nothing that won't cover easily. Would recommend as they seem to be able to get anything.

Shelley Cafer

Amazing customer service received on my first order with Next Day Insulation. Prices were very competitive too and all items were in stock and delivered quickly. I would definitely recommend and will be using them again in the near future. Thanks to Chris for all his help.

MiU Designs

Great customer service and delivered on time to a date that suited our onsite needs. I have used several times for numerous items and will use again! Highly recommend

Mark Jones

Great company to deal with and quick delivery,
What more could you ask for.

Read more reviews here

Why us?

Insulation & Drylining Supply for Liverpool and Merseyside

Liverpool's housing has its own character: large Victorian and Georgian houses split into flats and shared homes, dockside warehouses turned into apartments, and exposed coastal properties on the Wirral and up towards Southport. That mix means fire separation and sound control come up on almost every order we send there.

HMOs and flat conversions

Converting a house into an HMO or self-contained flats usually brings fire separation and sound requirements between units. Building control and your council's HMO licensing team will confirm what applies to your property. The core materials for that work are:

Period terraces and townhouses

Solid-walled Victorian terraces across the city lose heat through the walls and through suspended timber floors. Line walls with insulated plasterboard, and insulate between floor joists from below where there's access. In tall rooms with big bay windows, plan your cuts before ordering so you buy the right sheet sizes.

Coastal homes on the Wirral and Sefton coast

Properties facing the Irish Sea take a lot of wind-driven rain. Make sure walls are watertight before insulating them. For external upgrades, see our external wall insulation and K-Rend render systems.

Delivery across Merseyside

We deliver to Liverpool, Birkenhead, Wallasey, St Helens, Knowsley and Southport. Deliveries are kerbside with crane offload, Monday to Friday. Student areas and city-centre streets can be tight for parking, so tell us about access when you book. For next-day, check stock with us before 10am; otherwise allow 2–3 working days.

Merseyside FAQs

Which fire board do I need for an HMO?

That depends on the fire rating building control or the licensing team asks for. Send us the specification and we'll match boards and thicknesses to it.

Can I insulate a suspended timber floor from below?

Yes, if there's a void you can get into. Mineral wool held between the joists with netting or battens is a common approach. Ask us for a parts list.

Do you cover Manchester as well?

Yes. See our Greater Manchester page.

Related project guides

Next Day Delivery to you or your site

Minimum Order £350.00 ex. VAT

Contact us for orders below £350.00

Delivery cost £50

£350.00 - £599.00 ex.VAT

Free Delivery

Over £600.00 ex.VAT