What is PU Foam Spray?
PU foam spray is a two-component polyurethane system sprayed directly onto a roof or wall surface, where it expands and cures within seconds into a rigid, closed-cell foam. Because it's sprayed rather than laid in sheets, there are no seams for water or heat to find a way through.
Key Benefits
- Seamless insulation — No joints between panels for water or air infiltration.
- Dual insulation & waterproofing — Closed-cell foam resists water penetration as well as heat transfer.
- Fast application — Sprayed directly onto the surface, curing within seconds of application.
- Lightweight — Adds minimal structural load compared to traditional insulation build-ups.
Where It's Used
- Metal roof sheeting — Direct spray application for factory and warehouse roofs.
- Concrete roof slabs — Combined thermal and waterproofing layer.
- Wall cavities — Fill-in insulation for cavity wall construction.
- Cold storage building envelopes — Continuous insulation layer for temperature-controlled facilities.
Our Process
Every pu foam spray project follows the same disciplined process, whether it's a single room or a full industrial facility:
Site Survey & Testing
We assess the substrate, moisture level and expected load, including finishing every sprayed area with a protective UV-stable topcoat, since the foam itself must never be left exposed to direct sunlight and weathering.
System Recommendation & Quotation
Based on the survey, we recommend the right system grade and provide a free written quotation.
Surface Preparation
The existing surface is ground, cleaned or primed so the new system bonds properly.
Application & Handover
Our own trained crew installs the system and hands over with a completion check — no subcontracted labour.
Frequently Asked Questions
Does PU foam spray need a protective topcoat?
Yes, always. The foam degrades under UV exposure if left bare, so every application is finished with a UV-stable protective coating.
How much does PU foam spray reduce roof heat compared to a bare metal roof?
The reduction depends on foam thickness and roof design, but a properly specified spray-foam layer significantly cuts radiant heat transfer compared to an uninsulated metal roof — we recommend thickness after assessing the specific roof.
Can PU foam spray be applied over an existing roof without removing it?
In most cases yes, provided the existing roof surface is structurally sound and properly cleaned and prepared before spraying.
What is the PU foam spray price in Bangladesh?
PU foam spray price in Bangladesh depends on roof area and foam thickness. Contact us for a free site visit and quotation.
