New party wall detail issued by Robust Details Ltd

07.08.2018

News

Robust Details Ltd have included a new separating wall type bringing their suite of Robust Details patterns to 68.

Separating wall - cavity masonry construction detail

E-WM-32 is a masonry lightweight aggregate wall that uses lightweight aggregate blocks (1350-1600kg/m3) and 10kg/m2 gypsum based board applied on dabs direct to the blocks, and the minimum 75mm cavity is filled with Knauf Earthwool Masonry Party Wall Slab. The testing for this wall enables it to be rated to deliver a 3dB improvement over the Building Regulations minimum.

There’s also a variation to the gypsum board required on E-WM-17 and E-WM-20 which has now been reduced in weight from 9.8 kg/m2 to 8 kg/m2. Even with this amended specification, the testing has proven that these walls are still capable of maintaining their +5dB performance

Further information

See http://www.robustdetails.com/the-handbook/selecting-your-robust-details/masonry-walls/e-wm-32

Comments

Sound insulation

Submitted 4 years 7 months ago

Dear sirs we have developed a plaster made of cork ideal for party wall insulation can you advise us on the best testing to have carried out. ?

To show the benefits , it's mainly aimed at existing properties.

Barn Conversion Party Walls

Submitted 2 years 4 months ago

We are doing a barn conversion. The party walls are 450mm stone. Do you have a design to ensure that sound is not transmitted ? We have previously used your Robust Design in new builds with great sucess ! Thank you . Sarah Brotherton

LABC Response

Submitted 2 years 4 months ago

Hi Sarah,

Thanks for your message below.

Robust Details are produced by Robust Details Ltd. They provide an alternative to pre-completion testing for demonstrating compliance with the performance standards of Part E for new build dwellings only. See the FAQs at the Robust Details Ltd website for more information.

Section 4 of Approved Document E provides some basic guidance on how adequate resistance to the passage of sound may be achieved when a dwelling is being created by a material change of use. However, this guidance is rather generic and does not explicitly cover stone walls.

In my opinion, I would recommend you contact a suitably qualified acoustic engineer who will most likely be able to help you with designing and specifying the works to the party wall to ensure that the pre-completion sound testing is passed.

Thanks,
LABC Team