Damp Proofing & Property Maintenance condensation control positive input ventilation - piv Condensation in Hemel Hempstead

Office: 01442 211826 

Dean:  07958 722 208

Amie:  07984 758 291 Damp in Hemel Hempstead penetrating damp treatment in Hemel Hempstead



Penetrating damp (or Lateral Damp) is any water unintentionally coming inside from the outside through building walls. Unlike rising damp It can occur at any level from the ground up and can affect Roofs, Ceilings and Walls. Penetrating Damp is usually seen first on external walls, formed as an isolated patch of dampness that can increase in size after periods of heavy rain. This can be caused by a number of reasons including High Ground Levels, Blocked Guttering and/or damaged pointing.  Once the water  ingresses through the wall happens other identifying factors can occur.

Damaged Masonary

As Penetrating Damp Specialists we would like to give you a detailed description on how to identify and treat penetrating damp, if you are unsure that the cause of damp in your property is Penetrating Damp, please contact us to speak to our Damp specialists. 

There are three main causes of damp, Rising Damp, Condensation and Penetrating Damp, although we are looking at the latter we can offer you advise and recommendations for the other two.


Water - as we said before “water is essential for human life but it can spell disaster for a home".  Water is relentless in its determination to penetrate your home or property, only the smallest of cracks is needed for water to be able to find its way in. You are then left with the (not always so easy) task of finding the entry point, once located your job hasn’t ended, you then need to decide on the best course of action to take to fix the problem before it becomes any worse.   

What Problems Can Penetrating Damp Cause?

Ranguard's Soultion

Penetrating Damp Treatment

Damp Plasterwork

Ranguards first step to treating penetrating damp is identifying the cause. Our expert team we will carry out a full property check of everything in and around your property.

Penetrating Damp if left can lead to further problems including:

  • Wet Rot
  • Mould
  • Damp Plasterwork
  • Damp Smells
  • Frost Damaged Masonary 
  • Visible Water Damage
  • Rooms feeling cold, damp and uninhabitable
  • Heath Problems due to mould growth

As penetrating damp forms when water gets in from the outside we will look at:

  • Gutters and downpipes - making sure they are unobstructed, correctly fitted and intact.
  • Window and door frames – Looking at any deteriorating seals or Blocked drip groves.
  • Walls – Cracked brickwork, render and masonry and/or missing pointing.
  • Ground levels – We will check to see if your external ground levels are lower than you internal ground levels.
  • Missing, loose or cracked roof tiles
  • Defective Flashing
  • Deteriorated flaunching
  • Loose or missing ridge capping.

Once the cause or causes of penetrating damp have been Identified, Ranguard will offer you the best possible solution.

Once the ingress of water has occurred, penetrating damp can be easier to spot, the problem with this is it could now have been weeks or months since the penetrating damp first started.

  • Damp patches on walls or ceilings can appear, these can grow larger during periods of heavy rain fall.
  • Wet or crumbling plaster, water droplets or free flowing water depending on the severity of the damp.
  • Mould spores starting to form depending on the conditions

Mould Growth

How to identify Penetrating Damp

What is Penetrating Damp?

How To Identify Penetrating Damp