Timber frame Q

Mr.Diagnostic

I know nothing about building practices but something that I am wondering is why does everyone use block construction as an outer layer with timber frames?

Someone correct me if I am wrong, but the block outer layer is not structural so why not use something more efficient. Would wood cladding or maybe a modern sheeting material with good insulation properties not be better?

sas

Mr.Diagnostic wrote: »

I know nothing about building practices but something that I am wondering is why does everyone use block construction as an outer layer with timber frames?

Someone correct me if I am wrong, but the block outer layer is not structural so why not use something more efficient. Would wood cladding or maybe a modern sheeting material with good insulation properties not be better?

Block work is cheap (cheaper than any of the alternatives) and more robust too in most cases. It takes alot less maintenance than the altervatives. That's why it's popular.

There is no advantage in using an insulated anything outside a ventilated cavity and I wouldn't build a TF without a ventilated cavity.

sydthebeat

Mr.Diagnostic wrote: »

I know nothing about building practices but something that I am wondering is why does everyone use block construction as an outer layer with timber frames?

Someone correct me if I am wrong, but the block outer layer is not structural so why not use something more efficient. Would wood cladding or maybe a modern sheeting material with good insulation properties not be better?

the definition of proper materials in teh building regs require a dwelling to be "sound" for a period of 60 years (i think!)

therefore if you build by an off-standard method, the onus is on you to prove that this method will meet these requirements.

Single skin building does occurm with either wood cladding, cement board etc as a finish onto TF

as SAS says though, building without a vented cavity in a TF house is high risk, therefore any insulative material on the external of a cavity is useless.
The outer "leaf" is the weather proofing.

Its quite possible to build using any finishing material (eg slate finish, profiled galvanise etc....) once you can prove its a "proper material" fit for purpose

galwaytt

..it's all down to price.


With block leaf, rendered, coming in around €28 sq/m, Cementitious board comes in anywhere from €43 - €73 sq/m

Unless you have a specific requirement for it, therefore, most people wont use it, as they can't justify the cost, which I fully understand.