Wethertex has over 36 years experience in stopping penetrating damp in damp walls and has a range of guaranteed

damp proof coatings

,renders and injected treatments that waterproof,protect and eliminate penetrating damp in walls .

* No Damp Patches or Black Mould

* Damp Walls Allowed to Dry Out

* No Musty Damp Smells

* Re-Decoration eliminated

* Drier & Warmer Room

 

Penetrating

damp walls

are caused by rain water being absorbed by the porous outer skin of the wall and then soaking through the structure by capilliary action to finally show up as wet patches or

black mould

on the inside. UK winters are especially harsh on exterior wall surfaces such as cement renders and brickswhich become more porous and susceptible to wind driven rain which leads to

penetrating damp.

 

Watch and listen to the experience of one of our customers:

 

 Abnormal Damp Levels

A small amount of penetrating damp in walls is not a problem. In fact it is essential that some water is allowed into the wall and on average an external wall will have around 10% to 15% moisture content.

This small amount of penetrating damp drops the temperature of the wall to ensure that the warm moist air inside is drawn through to the outside ie the house breathes and regulates the

relative humidity

levels in the home. This keeps us warm, dry and maintains a healthy ambient  atmosphere.

Unfortunately, due to ageing and erosion

porous bricks

and external renders lose the ability to resist penetrating damp.

So,if you are having penetrating damp problems from poor brickwork,cracked or split wall render or peeling masonry spray paints then call in the leading

damp contractors

in the UK.

Please continue reading for more damp info……

Removing Render Can Make Damp Walls Worse

Many old cement renders applied to exterior brickwork contained Lime mixed into the sand and cement which meant it burnt into the brickwork and therefore lasted for many years.

The problem when knocking off old cement renders,is the faces of the bricks have been burnt away and are ideal for penetrating damp.

Spalled bricks

absorb water whenever it rains and wet walls cost a lot more to heat than dry walls.

 

 

Our Penetrating Damp Solutions Guarantee Dry Walls

Penetrating Damp solutions vary but the secret to successfully curing penetrating damp walls permanently is to restore the

damp proofing

ability of the wall surface to once more resist

rising damp

and penetrating damp.

It is crucial the wall is not sealed and continues to breathe. This ability to repel penetrating damp and yet allow moisture vapour to pass through from the inside is known as  microporous.

Wethertex has the most

microporous wall coatings

in its field and has gained an unsurpassed reputation for curing penetrating damp walls and our

damp proof coatings

are 400% more breathable than most other brands.

Porous Walls Cause Penetrating Dampness Problems

Whilst having an excess of penetrating damp soaking our homes is bad news, there will be no long term damage if remedial action is taken early to

treat damp walls

.

Visible signs of open or

porous masonry

surfaces,are missing pointing in mortar joints and spalling of brick or stone faces when the outer protective layer has blown off through frost damage as well as the obvious wet or penetrating

damp patches

on the inside of the house wall.

For damp walls that have been

bitumen painted

or cement rendered in a misguided attempt to cure a penetrating damp problem you will see the paint peeling off and the tyrolean or pebble dash render will usually have cracks or hollow patches where water gets behind and can soak into the masonry.

The double whammy is that on frosty nights the water that is held in the body of the masonry will freeze, expand and open up wider cracks and pathways for future rain to enter and spread. This is why we urge you to act as soon as you spot any of the tell tale signs of damp walls.

Curing  Penetrating Damp Problems in Brick, Stone & Concrete Walls

If spotted in its early stages damp walls with penetrating damp will have only caused minor damage to external brick, stone or concrete surfaces. In this instance it is often possible to effect a minor repair to the damaged mortar joints by repointing missing and loose mortar or repairing small narrow cracks in concrete finishes.

In the event of a few badly spalled bricks or stone slips we can chop these out and replace with new ones to stop penetrating damp from occurring.

Once the mortar or brick face problem has been repaired and made good we apply a specialist microporous clear

waterproof coating

by low pressure spraying the affected damp walls. This is a repeat application until the whole area is water repellant and the damp proofing is then complete.

This clear coating is that powerful and effective it comes with its own AXA 10 year Insurance Guarantee. For those of you keen to maintain the appearance of your home then damp walls are best dealt with using our clear coat as the penetrating damp solution and by injecting a cream into the

Damp Proof Course

to stop rising damp as well.

For brick or stone walls that have been too badly damaged by rain and frost the best solution is to decorate the whole wall with a breathable specialist coloured wall coating as you would with the below failed sand and cement type renders.

Tyrolean,Pebble Dash,Spar Dash,Cement Render & Penetrating Damp

All these renders are water based and mainly used to cover up spalling or blown brickwork in an attempt to stop

dampness

from penetrating into the walls . In reality all these sand and cement based wall renders act as a virtual concrete sponge – this can  worsen an existing damp problem. Damp Walls affected by penetrating damp are usually prone to blowing and cracking of the surface in frosty conditions.

Up to 1 gallon of water can be held in each square yard of the Cement render/Tyrolean/Pebbledash and Spar Dash coatings with each individual brick potentially able to hold 1.5 pints of water !!

Because water is held in the outer face,low temperatures will freeze this water, which then expands as it freezes. Cement render/Tyrolean/Pebble dash and spar dash are brittle and will crack and ‘Blow’ under this expansion pressure.This then opens up more areas for the penetrating damp to get into and the damp walls get worse.

If you see an older property that has cracked, blown or damaged wall rendering that has become porous and hollow, it is a safe bet it was more than likely applied in the first place to cover up

porous bricks

or stone in a bid to protect damp walls from penetrating damp in heavy rain.

Again,depending upon the amount of damage to the exterior render it may be possible to hollow out the cracks,remove the brittle hollow sections and then repair them. Once the wall render is repaired a through coloured water resistant paint coating should be applied but in a few cases the inherent weakness of the tyrolean or pebble dash means more drastic action is called for.

When the rendering has cracked beyond repair the only solution is to remove it completely,clean the wall down and apply a tried and tested

water proof coating

that will not only look good for years to come but, crucially, will dry out damp walls for good !!

 Using Masonry Paint to Stop Dampness in Walls

The final old fashioned way of attempting to stop penetrating damp in wet weather is to paint walls with  masonry paint,bitumen or have a

silicon spray paint

applied. Again, these often fail and signs of peeling and blistering paint show there are still damp walls.

As before if caught very early remedial action may be possible but to prevent a re-occurence it is often best to completely remove the old failing paint and replace with a coating that stops penetrating damp and guarantees no more damp walls.

Penetrating Damp Walls Specialists