Lining damp walls - why lining membranes can be the best option

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Property Repair Systems - 01626 872650 DIY Doctor Line

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DIY Doctor Project Name - Lining Damp Walls

Relevant products

Buy Salt Neutraliser - click here

Buy Membranes for plastering or plasterboarding over - click here

Project Site Photos

Basement Conversion - click here

Lining a small Cellar - click here

How we can help - we can analyse your building's symptoms, find the causes, provide the solutions

Symptoms - damaged plaster, crumbling, cracking, hollow, rough, loose, paint will not stick, paper loose or sticky

Photos - extreme examples - yours may be much less obvious

Please send us your examples by E Mail to:

Some obvious examples

Salts pushing off paint  on a plastered wall

Salts pushing off paint and damaging finish plaster

Plaster damp from damp pushing off paint

Plaster damp from damp pushing off paint

Fixing dimpled side of Mesh Membrane towards the damp wall.

Fixing dimpled side of Mesh Membrane towards the damp wall.

Common diagnosis - natural Rising Damp - this is incorrect - damp walls are very rarely caused by natural rising damp

Common treatment - inject a Chemical Damp Proof Course - this will not cure the fault and the damp will return

Common cover-up - replaster - the damp and salt will ruin the new plaster and decorations, the damp will be pushed up higher and outwards

Worst cover-up - 'tanking' - any method that seals or partially seals the wall will simply hide the moisture as it is forced to climb higher

Plasterer's fix - skim over the old plaster - often using a primer like Unibond - usually fails in patches fairly quickly

Fact Alert - this is not a symptom of natural rising damp - so damp proofing injection will have no useful effect

Fact Alert - most dampness problems in buildings are NOT caused by natural rising dampness.

Plaster damage is an entirely Man Made fault!

Common causes

  • water leaks inside the building - particularly in modern buildings fitted with plastic damp proof course and membrane materials
  • water leaks under the building or from next door or the road - particularly in older buildings, built prior to the use of plastics
  • 'bridging' of the damp proof course - mainly by paths, roads, steps and added structures
  • penetrating damp, through the outside of the wall - leaking gutters, downpipes, wall penetrations like pipes, wires, old wooden plugs, cracked render, missing joint mortar
  • cavity walls 'bridged' with debris or damp Mineral Wool insulation

Before spending money on any form of damp proofing go to our Diagnosis page and check your damp for yourself - it is easy to read, non technical stuff - click here

For help with the MYTHS call our experts on 01626 872650.

The answer is usually

That the dampness was not Natural at all, but was caused by a water leak from a drain, a water main, a foul water pipe or a central heating pipe. Do not rule out leaks being from a neighbouring property or road. Always look inside neighbouring properties to be safe. We will help you or your Builder/Plumber to find the cause.

The solutions are

Find and fix the leak(s), remove the indoor plaster (if damaged) and fit our Mesh Membrane - then replaster using Bonding Plaster. A Guaranteed result - guaranteed for 20 years.

Mesh Membrane Kits from one square metre upwards - click here

Or, speak to our experts for up to 1 hour.

Click to buy a consultation with our Qualified Damp and Timber Surveyors - £120.00 including VAT -

Professional Guide to Damp Problems book from Property Repair Systems

Dampness in Buildings - a book reprint by Graham Coleman - become your own Expert in 1 hour! Buy our "Dampness in Buildings" reprinted book by national dampness treasure, Graham Coleman. A great read, short and to the point.

Printed Book - £9.99 -

Book Download only - £5.99 -

Home survey buy a calibrated Damp Meter - click to buy - Damp Meter - £67.87 plus VAT -

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Testimonials - some testimonial letters from happy customers

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TEL: 01626 872650 DIY Doctor Line


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Site written by: David Moore

David Moore, B.A. (Hons.), C.T.I.S., C.R.D.S. Technical Author


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