Cavity wall pumped insulation Beads or foam

AlertKevin · 09-01-2019 03:49PM #1

Hi,

We purchased a house recently. It was built in 2006 and is dry lined with an insulated slab. We have noticed it heats up quickly and loses the heat quickly. Also when I was changing some sockets I noticed a lot of drafts.

We are thinking of pumping the cavity with either beads or foam. There is a big price difference nearly double for the foam.

What are the pros on cons of beads and foam. Can anyone recommend the best solution.

Thanks,

Kevin

BryanF · 09-01-2019 04:00PM

Is there any chance, it’s timber frame and not block ?

Assuming it is block/cavity/block - is the any existing insulation in the cavity? Foam products may not be suitable if that’s the case

AlertKevin · 09-01-2019 04:08PM

Definitely block. We had to bore a hole for a vent and this confirmed it was a cavity with no insulation in it.

Why would foam not be suited?

Thanks,

Kevin

BryanF · 09-01-2019 04:13PM

Review fine print of product certification

Lumen · 09-01-2019 04:17PM

There are several different foams on the market but none of them is NSAI certified for this application.

So the question "Why would foam not be suited?" is best answered "because they haven't proven to be suitable through the NSAI certification process".

Search previous threads.

AlertKevin · 09-01-2019 04:28PM

Thanks.

These companies are saying they are certified. How do I confirm they are on the NSAI list?

-snip-

Lumen · 09-01-2019 04:40PM

AlertKevin wrote: »

How do I confirm they are on the NSAI list?

Ask the manufacturer for the certificate number that applies to your application (i.e. masonry cavity insulation) and find the cert here:

https://www.nsai.ie/certification/agrement-certification/search-agrements-certificates/

You can also search by product name.

NSAI certification is application specific! As BryanF says, read the small print of the cert.

BryanF · 09-01-2019 06:46PM

Neither of those are for a masonry cavity

bunderoon · 19-02-2026 01:37PM

Resurrecting this old thread - to those who got cavity wall insulation done over the last number of years, how has it gone for ye? House stays warmer for longer?

Cavity wall pumped insulation Beads or foam

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