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London's #1 Condensation Specialist


Thousands of London’s homes are sick.

Whether due to heavy-handed insulation or poor design, families across London are living with damp and mould that slowly eats away at their homes and their health.

But there is a cure.

For a running cost of just pennies a day, Positive Input Ventilation (PIV) units quietly push damp air out of your property by creating positive air pressure.

Call us now or request your call back to book your PIV unit installation.

The NHS Blames Damp and Mould for Respiratory Problems

Damp damages more than your property, it damages your body too. The NHS warns that “…if you have damp and mould you’re more likely to have respiratory problems, respiratory infections, allergies or asthma. Damp and mould can also affect the immune system.” As well as eliminating damp, PIV units filter allergens out of the air and can significantly improve quality of life for people suffering from asthma or other breathing problems.


You’ll immediately notice an improvement in air quality, and over time your damp and mould will disappear.

If you haven’t bought your own PIV unit or don’t know which type would be right for your property, we can source the ideal unit for you from one of our trusted providers.

Don’t live with damp a day longer than you have to. Call us now or request your call back to book your PIV unit installation.

DAMP Quote.
Request Your Callback Today

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I wanted to take a minute and thank you all for resolving the damp issue we had. Its so nice to come home and not see or smell the disaster that was there before. Just in time for Christmas which I would have to say you guys saved as we have family coming who had their flights already booked. A massive relief Thank you so much!! Would definitely recommend your team from initial contact to works completed. Great job.
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I chose to use Environ to deal with a damp wall, the whole process from beginning to end has been straightforward, well explained and they've managed to strike a pleasing balance between friendliness and professionalism. Everyone they sent over during the course of the work, as well as their office staff has been, nice helpful and accommodating. I hope not to need to use them again but if I do, I'll do so gladly!
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Came round to have a look at work required and actually realised it was all low level work. Explained and showed what was required. They can back about a week later (or thereabouts) to carry out the work which was done very quickly (about an hour if I recall). Because it took less time than was originally thought have not been charged for the materials so was very happy about that.

Ryan R.


Kristian F.


Jacqueline M.