Cavity Closer

Cavity Closer

An open cavity around a door or window frame is basically a direct path for heat to escape, no matter how good the rest of your insulation is. The Cavity Closer deals with that specifically — it seals off the cavity opening and creates a proper thermal barrier, cutting down on heat loss while also giving you a clean, stable edge to finish the opening against.

Made from durable material with insulation built in, it holds up well against moisture and general wear over time. It’s easy enough to cut to size and fit, which makes it a straightforward addition to pretty much any job involving doors, windows or other openings in a cavity wall.

What you get with it

• Cuts down on thermal bridging
• Improves overall energy efficiency
• Proper cavity insulation
• A neat, clean finish around openings
• Moisture-resistant and durable
• Easy to cut and install
• Suitable for trade and DIY use
• Built to last

The details

Made from high-quality insulated material for good thermal performance and structural durability. Designed for cavity wall work around doors and windows, improving insulation while holding up reliably across residential, commercial and industrial buildings.

Where it’s useful

New-build homes, extensions, commercial buildings, refurbishment projects, cavity wall construction generally. Used around window frames, door frames and other masonry openings wherever cutting down on cold bridging actually matters.

Suitable for professional builders, contractors and DIY users. It’s become a fairly standard part of getting a modern, energy-efficient opening right.

Why it’s worth having

For sealing and insulating cavity wall openings while cutting down on thermal bridging, this does the job properly. Durable, moisture-resistant, straightforward to install — whether you’re fitting windows, installing a door, or working on a new build altogether.

Pick up the Cavity Closer from Smart Innovation and get better insulation and a proper finish around every opening.