ProctorGeo Vap120 GEOVAP Internal Building Membrane - Commercial Grade - Tight House

Airtightness · Draught proofing · Ventilation

seal it tight . ventilate it right .

Draughts can account for up to 25% of your home's winter heat loss. Tight House products are designed and field-proven by Efficiency Matrix — the building scientists who blower-door test Australian buildings for a living.

★★★★★ 212 reviews From verified customers
Design award winner qVENT · Good Design 2025
Since 2009 Australian owned
Designed by building scientists
Efficiency Matrix
Field-tested products
Blower door & IR verified
Ships Australia-wide
Ships Australia-wide
4.9★ from 212 reviews
Verified customers

Interactive leak map

WHERE IS YOUR HOME LEAKING?

Every home leaks in the same predictable places — we know, because we test them. Tap a hotspot to see the leak and the exact product that fixes it.

New Home

Orange = seal it    Blue = ventilate it

New construction map

BUILDING NEW? GET AIRTIGHT FROM THE FRAME UP

An airtight home isn't sealed at the end — it's built that way. Tap each construction detail to see the Tight House product that locks in the envelope before the plaster goes on.

New Home

Orange = seal it    Blue = ventilate it

New Home

Orange = seal it    Blue = ventilate it

TWO JOBS. ONE HEALTHY HOME.

Building science is simple: stop air sneaking out where it shouldn't, and move it deliberately where it should.

01 — The building envelope

Seal it tight

Stop draughts, heat loss, noise and moisture-laden air sneaking through gaps you can't see — but a blower door can.

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02 — Indoor air quality

Ventilate it right

A sealed home needs controlled airflow. Purge moisture, fight mould and keep air fresh — on your terms, not the weather's.

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Best sellers

FIELD-PROVEN FAVOURITES

The products our customers — and our own testing technicians — reach for first.

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Exclusive to Tight House

qVENT — ventilation, without the noise

The acoustic door vent that lets air through and keeps sound out. Fix bathroom moisture, balance ducted heating return paths and fight mould — with a design good enough to win national awards.

Australian Good Design Award 2025 Australian Good Design Award 2025
Better Future Design Awards 2026 — Silver Better Future Design Awards 2026 — Silver
Shop qVENT — $64.95
<strong>qVENT —</strong> <strong>ventilation, </strong>without the noise

Why Tight House

SOLD BY THE PEOPLE WHO TEST BUILDINGS FOR A LIVING

Tight House is the product arm of Efficiency Matrix — an Australian building science consultancy specialising in airtightness testing, thermography and building envelope auditing since 2009.

We find leaks for a living
01 / Diagnose

We find leaks for a living

Blower doors, smoke pencils and thermal cameras are our day job. Every product here solves a leak we've measured in real Australian buildings.

Built for Australian homes
02 / Design

Built for Australian homes

Designed around Australian door profiles, exhaust fans, downlights and ducted heating — not imported guesswork. DIY-friendly, renovation-ready.

Free specs & how-to guides
03 / Back it up

Free specs & how-to guides

Free residential airtightness specifications, install videos and honest advice on the Efficiency Matrix YouTube channel. We'd rather you get it right.

★ 212 customer reviews

DRAUGHTS STOPPED. CUSTOMERS HAPPY.

★ ★ ★ ★ ★
"I've used it on 4 doors in my flat, including metal and timber doors. It's worked to stop the drafts and helped dampen traffic noise from the front."
Davies Door & Window Seal
★ ★ ★ ★ ★
"Effectively solves the airflow issue for pulling humidity from the room — and I love the contemporary design with recessed fixings and noise isolation."
Randy W. qVENT Door Vent
★ ★ ★ ★ ★
"Easy to install and very effective in blocking air coming through the gaps. I can recommend this product for its ease of use and effectiveness."
Misbah Y. Door & Window Seal
★ ★ ★ ★ ★
"I've used it on 4 doors in my flat, including metal and timber doors. It's worked to stop the drafts and helped dampen traffic noise from the front."
Davies Door & Window Seal
★ ★ ★ ★ ★
"Effectively solves the airflow issue for pulling humidity from the room — and I love the contemporary design with recessed fixings and noise isolation."
Randy W. qVENT Door Vent
★ ★ ★ ★ ★
"Easy to install and very effective in blocking air coming through the gaps. I can recommend this product for its ease of use and effectiveness."
Misbah Y. Door & Window Seal
Winter is when leaks cost the most

Stop heating the street.

Start with one door this weekend. Most Tight House fixes take under an hour with tools you already own.

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