Restoration & Refurbishment

Replastering external wall previously limed

Anonymous user 9 March 2024 - 3.33 PM

Hi there, I'm hoping for advice on what plastering materials would work here. I've had some damp affect a first floor external bedroom wall. The area affected is around a window and I suspect was caused by gutter issues which have been addressed and the wall is now dry. The house is a 1902 victorian terraced house, the wall was previously lime plaster and all other walls in the room are the original lime and it great condition. It's had to be taken back to brick. I think there is at best a small 10mm cavity space. When I spoke to the Gypsum technical team they said their products are not suitable for the job. They suggested I use lime in order for the walls to breathe. A local plasterer was going to use thistle Bonding and multifinish. If anyone can shed some light on how this wall should be plastered

Anonymous user

Hi there, that is correct standard multi or board finish will seal the wall and bring damp back, best option is to add a small bit of lime. It has been known to add a small bit of sand, to the base coat only, aswell as lime throughout.this ensures breathable walls however is harder to work than original plasters. Hope this helps

Answered1 May 2023

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Greg Snape Building

Rating: 5 out of 55521 reviews

Retford

Gypsum based plaster should not be used. There are quite a few specialist lime suppliers that will offer free advice on which lime product to use. Under no circumstances should cement be used.

Answered10 May 2023

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Under1Roof

Rating: 3.7 out of 53.753 reviews

Cheltenham

There’s a product called renovating plaster which is lime based. Use this to back out your walls then you can top coat with multi finish a little expensive but works !!

Answered19 May 2023

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Damp Cure Services

Rating: 5 out of 555106 reviews

Cambridge

Don't use renovating plaster..it has bad bits in it. What you ideally need is a product called calibux 90. It's a quicklime. Add this is your aggregate in a 2.5 to 1 ratio. Then add water to find a consistency. This stage requires full ppe. The chemical reaction will produce a hot lime mortar. Absolutely brilliant for plastering and will be identical to heritage mix. Your top coat will be one kiln dry sand to one measure of quicklime. You will find the results are perfect and your house will thank you for it!

Answered21 May 2023

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