Drylining comparison

fitzie79

My house is currently spec'd for 50mm insulated gyproc plaster slabs. However, someone has recommended using kingspan kooltherm k-18 slabs. Would these give a much better performance or how substantial is the difference? Are the kingspan slabs much more expensive? Are there any other drylining slabs that would be worth considering?

My wall is a standard 100mm cavity wall with 65mm kingspan hytherm insulation in the cavity.

Heatherview

Hi Fritzie
K18 Kooltherm would be approx 43% + vat more expensive than than your standard board. The U valve would be way better. Std board approx €30 sheet and K18 approx €53 sheet +vat. The value is worth it very high density board. Check out with your nearest builders merchants they will advise you on the U values or they can check with the manufacturer. K18 was brought to the market to help achieve new BER rating

Heatherview

Carlow52

See the spec here and be sure u/ the builder/installer understand the fixing requirements.

http://www.insulation.kingspan.com/uk/k18.htm

compared with
http://www.insulation.kingspan.com/uk/k17.htm

fitzie79

thanks for the feedback. it seems a bit more expensive for the k18 but insulation is something that i am willing to spend money on to get it right. Is the k18 the best on the market or are there better products out there?

Slig

Dry lining is not the best option for insulating a house, well see why in a couple of years but already the articles have started apperaring in the papers about mould growth ("Construct Ireland" I think, I'm trying to find it.)

kkelliher

there are alot of similar products to the K18 on the market at present.

Hytherm make one and now even Brooks have there own branded product. They are very similar in spec but cheaper than Kingpan

gears

Slig wrote: »

Dry lining is not the best option for insulating a house, well see why in a couple of years but already the articles have started apperaring in the papers about mould growth ("Construct Ireland" I think, I'm trying to find it.)

It was in "Construct Ireland" ok, I seem to remember the architect Joe Little did a piece on it. From what I remember and I may be wrong I think it was directed more at poor application or inappropiate use of materials rather than the whole idea of dry-lining being a bad idea.

Builderfromhell

Dry lining an already insulated cavity wall is not a good idea.
The inner surface of the cavity wall, in normal circumstances, is warm. For this reason water does not condense on it. When you dry line, this inner wall is now cold (because of dry lining). Water percolates through dry lining and condenses on inner wall. Mould grows but may not be seen. This mould is Toxic.
These dry lining systems are outlawed in mainland Europe.

RKQ

Builderfromhell wrote: »

These dry lining systems are outlawed in mainland Europe.

Interesting - what do they do in mainland Europe?
Any specs, details or even mould to board thickness ratio?

Any research documents to support mould growth / ban etc - just interested in the whole area.