Products

Product options

PIR Insulation Boards

Rigid PIR with strong thermal performance at practical depths making it a great lightweight open for Underfloor/Pitched Roof building specifications. Supplied by esteemed manufacturer, Unilin, the PIR insulation boards we supply are suitable for floors to achieve a desirable thermal performance and where consistent tolerances matter. 

EPS Insulation Boards

Our EPS70 insulation boards are manufactured by Styrene Insulations, providing dependable compressive strength and easy-handling for domestic and industrial application projects. No special tools are required, meaning you can expect a simple installation partnered with excellent thermal performance.

Cut-to-size is available on both options to reduce any unnecessary waste and time for your team.
Please note our cutting services are available exclusively at our Eastleigh and Burgess Hill depots.

We encourage you to take a closer look at our floor insulation materials with sizing, supplier, coverage per pack, thicknesses and order quantity information all provided on each product page. These details help you choose the right thermal insulation floor build-up without delay. If you need a take-off, send the drawing set and we will confirm quantities.

Suitable for Underfloor Heating and Edges 

Both PIR and EPS70 polystyrene boards work with wet or electric underfloor heating when installed to the heating manufacturer’s guidance. Add perimeter edge strip and a suitable vapour control layer where the design calls for it. Our team can advise on board layout, movement joints and taping lines.

Why do building firms choose Johnson’s Insulation Supplies as their home for floor insulation supplies?

- Trade-first service with stock held in depth and pricing that helps you win work
- Bespoke machining for accurate, repeatable cuts that keep installs tidy
- Rapid turnarounds, with most orders cut and delivered within two days when needed
- Collection from three depots across West Sussex, Kent and Hampshire, or delivery scheduled to suit your site

Ready to order? Add your floor insulation boards to the basket at your desired thickness and quantity or get in touch for a tailored quote courtesy of our experienced supply team. 
If you are choosing between PIR and EPS for a particular build-up, our staff can help you balance thermal targets, loading and budget.

FAQs

Can I use PIR below a structural slab?
Yes, when specified. Install on a prepared base with the correct membrane and follow the engineer’s detail.

What about beam-and-block infills?
EPS is widely used for speed and coverage. PIR is an option where you need thinner build-ups.

Do you cut boards to exact widths?
Yes. Provide finished room sizes or bay dimensions and we will cut for a clean fit.

How quickly can I collect?
Core sizes are usually ready the same day. Cut-to-size orders are turned around quickly within a couple days; we will confirm a slot when you book.