BASF Walltite Insulation - Experiences?

Shane007

Frequent Poster
Messages
773
No worries. If you need anything else just let me know.
Nearly 2 weeks after the install, I am still dumb-founded with the difference within the house. I don't know if it's down to the insulation properties or the air tightness or a mixture of the two (probably the latter). The bedrooms that were never above 17C are now a constant 21C.
In my particular case, I am more than happy with the results.
I am just waiting for another particular technology that I installed last year to be listed on the HARP database which should be in the coming months & then I will get a BER done on my house. I am very optimistic about getting into the A's. Fingers crossed.
 

seantheman

Frequent Poster
Messages
932
Hi Shane, interesting stuff,i'm in the same situation myself 2000 built house, 100mm cavity,60mm thermal board insulation and am looking for a way of reducing my heating bills.Just wondered if you paid any particular attention to areas like the wallplate on last block? did they have a guy in the eves area checking while cavity was being pumped?
 

Shane007

Frequent Poster
Messages
773
interesting stuff Shane, i was thinking about getting the cavities filled. This product does sound interesting. some concerns i would have is weight in the cavity, movement - does it move with the natural movement of the building i.e will it crack/start leaving gaps as its solid? chemical reaction with the existing wall insulation causing one of them to break up?
From what I am told by the manufacturer, the product was initially designed for commercial use for bonding two walls together & it was discovered to be very suitable for domestic cavities, both new & existing builds.
It does not shrink at all compared to normal open cell PIR.
With regard to your existing insulation, it actually re-instates it back against the inner leaf. Mine had come away from the wall.
 

Shane007

Frequent Poster
Messages
773
Hi Shane, interesting stuff,i'm in the same situation myself 2000 built house, 10mm cavity,60mm thermal board insulation and am looking for a way of reducing my heating bills.Just wondered if you paid any particular attention to areas like the wallplate on last block? did they have a guy in the eves area checking while cavity was being pumped?
Yes they checked the detail at my eaves area. It is best to speak to the installers themselves as it is not my area of expertise. I posted their details in the recommended trades section.
 

Supernova

Registered User
Messages
3
I've tried to find the recommended section without success. ??? to get company name who installed your walltite.
 

Shane007

Frequent Poster
Messages
773
If you wish to PM me, I can give you the company and contact details.

If Leo allows, I can post them here too.

To date, it was a terrific investment. I am using approx 1 fill of oil per year now, however, this is due to a combination of improvements I have made, such as Grant Vortex condensing boiler, excellent heating controls, no hot water demand from oil and of course the greatly improved insulation and air tightness qualities.
 

Shane007

Frequent Poster
Messages
773
Thanks Leo.

Company I used is Ecotherm Insulation.
Contact there is TJ Byrne 0876666805

They are based in Meath but cover a large area.
 

LPFarmer

New Member
Messages
1
Hi Shane007
Im looking at using WALLTITE but know little about it and the info given here was great
 

Joe500

New Member
Messages
4
New to this site today. Thanks Shane an all who contributed.

My Story

I have a new 1.5 storey build, just recently started. I would like to use Waltite in the150mm cavity, since Insulation value is better than pumped beads, it seems.

I've seen a house with a 100mm cavity being pumped and it looks like amazing stuff. Injected through 12mm holes drilled in the mortar joints about 500mm apart ( the space of the holes is a guess from memory on my part).
It is sprayed in as a purple liquid and expands to, perhaps, 20 times its original liquid volume over a period of perhaps 6 or 8 minutes. I'm guessing the approx. expansion volume and time, based on a sample provided to me. They sprayed a tiny volume into a plastic beaker to let me see the product). It expanded steadily over time and overfilled the beaker until it looked like a 99 Ice cream cone in the beaker.
It ends up as a rigid, light and physically strong material that would completely fill a cavity.

My hesitation is based on the advice that it MAY cause the blockwork to crack, as it expands and generates forces in all directions.
The cracks MAY be small or large, I've been told. No cracks have appeared sofar, in the new installation I visited. That was a week ago.

I raised this question with the company who were doing the job and the workman said "if you are worried about cracking, don't use it"
and turned away. He was not rude or dismissive but seemed to accept that it could happen, without saying so directly.
I had previously sought a quote from a different company. I started with a phone call and and they were enthusiastic to quote and requested my plans, to calculate the price.
When sending the plans, I enquired (a) if the had experienced wall cracking after use of the product and
(b) if such cracking was covered by insurance.
This company did not respond or provide a quote, so I'm kinda concerned now.

Anyone on here ever heard about the risk of Walltite cracking block walls?
 

Nutso

Frequent Poster
Messages
549
We used Walltite in our new build 3 years ago. Our blocklayer anchored the internal and external block walls together with wall ties - apparently this helps to prevent cracks. They were aware of the insulation we were using. I am not sure if this is done as standard on new builds - perhaps someone else can answer that question.

However I can tell you that we are very happy with our end result. The house achieved an A2 rating and the BER assessor said that he hadn't seen much like it in terms of airtightness. The house heats easily and holds the heat very well.

I am not sure where you are based but if you would like to send me a PM, I can certainly recommend the company we used. No affiliation apart from happy with the work they have done for us.
 

Joe500

New Member
Messages
4
Thank you Nutso. That's very re assuring.
I'll send you a PM, when I figure out how to d it.
 

Joe500

New Member
Messages
4
Leo Thank you for the info. and explanation. I don't know what PG#14 means.

Nutso, thank you for that contact. Greatly appreciated!
 
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