FAQ
Heyen Delivery & Returns Information
Delivery :
Heyen UK offer a 2 to 3 day delivery service anywhere mainland UK. We can provide you with a fast reliable and secure delivery service giving a particular hour delivery window via email or SMS so you are kept in the loop and are able to track the progress of your delivery.
If you require products to be delivered to the Highlands of Scotland or Ireland these will incur an extra delivery charge and with a delivery window of 4 to 5 days.  On receipt of an order we will discuss your options.
If you wish to call to discuss any further, please call Tony on 0114 2680063
Returns :
We hope you don't have to return an item but if you need to, our returns policy is listed below.  Items should be un-used, in clean original resaleable packaging with all ancillerary items included.  Unwanted goods are subject to a 25% re-stocking and handling charge at the cost to the customer.
Any small items can be returned to us by the Post Office, or if the weight exceeds 15kg we would recommend that you use a carrier service.
 
Damp Proofing or Water Proofing?
Damp Proofing:
Where the external ground levels are lower than internal floor level then a damp proofing system is required.
Rising damp is where a failure of an in-efficient damp proof course has been installed or damp bridging due to the raising of external ground levels eg paths or driveways. In older buildings, where there is the absence of a damp proof course or leaking downpipes rainwater gutters.
These can lead to signs of dampness internally:
  • Peeling Paint and Wallpaper
  • Damp Musty Odour
  • Decayed Skirting Boards
  • Stained and Crumbling Plaster Work
  • Salt Deposits on the Wall
  • A discoloured white tide mark indicating signs of rising damp
Solution: Heyen Rising Stop Injection Cream combined with re-plastering of the internal walls to avoid the effects of future spoiling.
 
Water Proofing:
If the external ground levels are higher than the internal walls for example an underground structure eg: a basement then a full waterproofing system is required.
Penetrating damp, is where moisture ingress penetrates horizontally through the wall fabric of the building. Even if the dampness hasn't penetrated all the way through, this can still lead to various other damp issues in the property.
  • Damp and Damaged Plaster work
  • Dry Rot/Wet Rot and Fungal Spores on Timber
  • Damp Musty Odour
  • Black Mould Growth
  • Watermark Damage to the Internal and External of the property
Solution: Heyen Tanking System.
 
Caution:
If a damp proofing system is used where a water proofing system is required, this could have serious effects and the high probability of water ingress and flooding.
As well as saturated water in the ground the potential sources of water ingress are as follows:
  • Burst Water mains
  • fluctuating water tables
  • the future effects of climate change
  • temporary pockets of water
  • perched water tables
Different causes of dampness require different systems of treatment so it is very important to identify the correct diagnosis.
 
Condensation?
Kitchens and bathrooms are often primary sources of atmospheric water. Moisture is released into the air through normal daily activities such as washing, cooking, drying clothes, showering and bathing. This can occur commonly on windows or external walls, or cold surfaces within the fabric of the property. Look for it in corners, on or near windows, in or behind wardrobes and cupboards. It often forms on north facing walls.
The problems of condensation can lead to staining and mould growth, damaging wallpaper, wall surfaces, window frames, furniture and clothing. The development of mould growth is the most tell tale sign that it is frequently associated with condensation.
 
The appearance of mould may be black, yellow or green in colour, depending on the specific type of mould and the surface which it grows on. Black spot mould (Aspergillus niger or Cladosporium spp) for example, forms pyramid profiles in wall corners and at wall/floor or wall/ceiling margins as a consequence of condensation.
This can be easily confused with rising damp as Heyen UK can expertly identify the source of damp problem to ensure the correct remedial treatment is specified.
Moulds are hydrophilic fungi in that they require high levels of surface moisture. Capillary held dampness (such as that originating through rising dampness) is not sufficient to cause mould growth.
The mould requires free moisture on the surface to germinate. Tiny spores produced by the mould and the higher numbers of dust mites due to the moist conditions can increase the risk of asthma and respiratory illness in some people.

Maintaining a reasonable balance between heating ventilation and insulation can reduce excessive condensation however, a major review of lifestyle and occupation of the property is often necessary.
The Condensation season is particularly in the winter months, September through to April.
 
What is Dry Rot?
What is Dry Rot? - Serpula Lacrymans - Brown Rot:
Dry Rot can effect many types of timber, old or new. Dampness with a lack of ventilation is the fundamental cause of Dry Rot and are the ideal conditions for fungal growths on Timber.
Features of Dry Rot:
  • Large Cuboidal Cracking (Brown Rot)
  • Fluffy White Cotton - like mycelium under humid conditions
  • Silvery Grey Mushroom coloured skin often tinged with yellow patches
  • Timber crumbly to the touch
  • Strands, grey in colour, brittle when dry
  • Sporophore, fleshy pancake bracket, white margin and wide pored rust
  • Spores, rust red coloured
  • Active Growth - Musty Odour
  • Dry Rot is tolerant to alkali conditions and may readily spread behind plasters, mortars etc
Dry Rot Solution:
Once the source of moisture has been located and repaired, replace defective timbers affected by dry rot and treat with Heyen Dual Purpose Fungicidal Insecticide
 
What is Wet Rot?
Features of Wet Rot?
There are many fungal species causing wet rot. They may cause darkening of the timber compared to the lighter parts of the timber.  Wet rot is usually found in timber in contact with the ground which has become soaked by water leakage. Wet Rot effects the strength of the timber and can severely damage the structure of a building.
Coniophora Puteana - Cellar Fungus - Brown Rot
This particular fungus is found in damp basements, under floors, leaking roofs where there is inadequate ventilation and damp. It causes darkening of the timber has a distinctive yellow colour.
Mycelium usually only present in humid conditions, may spread over damp plaster of brickwork, strands thin usually brown or black though yellowish when in the early stages and darkens with age. The Mycelium are bendable compared to the Mycelium of Dry Rot which snaps.
Fibroporia Vaillantii - Mine Fungus - Brown Rot
This is a common cause of damage in damp woodwork in buildings. This type of wet rot fungi causes wood to shrink and split into cuboidal sectors. The Mycelium are white or cream sheets with the strands that are bright white and flexible and sometimes fern-like
Donkioporia Expansa - White Rot
Attacks hardwoods particularly oak and sometimes adjoining softwoods. Can cause extensive damage to oak than any other fungus, often found at timber ends embedded in damp walls. The wood becomes bleached reduced to lint like  consistency leaving coarse stringy like fibres but does not create strands and does not grow on masonry.
 

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