Dry Rot
Fungal   decay   of   timber   by   either   Wet   Rot   or   Dry   Rot   can   occur   when   timbers   are   in   prolonged   contact   with   damp   situations,   especially   in poorly   ventilated   areas   such   as   sub   floors.   Dampness   from   plumbing   leaks,   defective   gutters,   rising   dampness   or   high   ground   levels   etc., can create the conditions for decay to establish and wood rotting fungi to develop. The   fungal   growth   from   dry   rot   may   be   in   the   form   of   white   strands,   sheet   mycelium   and   fruiting   bodies.   The   white   strands   are   able   to penetrate   through   brickwork   and   mortar   joints   and   can   transport   moisture   to   dry,   poorly   ventilated   areas,   allowing the   spread   of   the   fungus.   The   mycelium   appears   as   silky   white   sheets,   often   with yellow   /   lilac   edges.   Fruiting   bodies   appear   as   fleshy,   pancake   like   growths,   laden with spores, often creating a red dust around the affected area. Successful treatment of Dry Rot treatment normally involves several key factors. Removal   of   the   moisture   source(s),   establishing   a   dry   environment,   eradication   of fungal growth and replacement of defective timber elements. Dry   rot   (Serpula   lacrymans)   normally   requires   cutting   out   and   disposing   of   defective timbers   and   chemical   treatment   to   adjacent   areas   to   eradicate   fungal   growth.   Where masonry   is   affected,   treatment   of   the   brickwork   may   be   required   in   the   form   of sterilisation and / or irrigation to the walls. Irrigation   is   the   term   used   to   describe   the   eradication   of   Dry   Rot   from   masonry   and involves   drilling   the   masonry   and   injecting   a   fungicidal   preservative   to   the   walls   under pressure.   Fungicidal   biocide   is   used   to   sterilise   the   surfaces   of   masonry   and   the oversite. Following   the   eradication   of   the   fungus   and   removal   of   the   moisture   sources,   new   timbers   can   be   introduced,   ensuring   isolation   from masonry   with   physical   barriers   and   adequate   ventilation   to   the   floor   voids.   Where   floor   voids   cannot   be   adequately   ventilated,   replacement in concrete may be required.   Wet   rot   treatment   is   usually   less   expensive   to   eradicate   than   Dry   rot,   as   eradication   of   fungal growth   is   much   more   simple   and   does   not   normally   require   chemical   treatment.   Eradication   of moisture   sources,   promoting   a   dry   environment   and   timber   replacement   will   still   be   required however. AB’s   range   of   available   treatments   for   fungal   decay   may   include   specialist   eradication   works, partial or complete floor replacements and replastering. Once    our    Surveyor    has    inspected    your    property,    full    details    of    the    proposed    treatment    is provided,   along   with   our   quotation.   Our   works   are   carried   out   by   our   own   full   time   skilled technicians ensuring a high standard of treatment and successful eradication. The works are covered by our comprehensive guarantees giving you complete peace of mind.
Extreme Dry Rot Damage
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Wet Rot The   most   common   type   of   wet   rot   is   caused   principally   by   Coniophora   puteana.   Poria   vaillantii is another important wet rot fungus and a number of less common fungi also occur. Coniphoria    can    be    found    in    some    form    in    most    properties.    Within    timber    the    higher    the moisture content the higher the chance of wet rot decay. While   each   fungus   has   its   own   unique   features,   the   general   appearance   of   wet   rot   is   similar   as    is    the    treatment.    Wet    rot    is    typically    confined    to    the    area    of    dampness    because    the mycelium does not spread into walls. Wet rot is not as destructive as dry rot, however can and does cause structural damage. Signs of Wet Rot in timber floors Wet Rot decay is usually first identified when foor timbers start to bounce or have movement. Skirting boards affected show signs of cracking even through paint.  The unpainted unprotected rear of a skirting board will be more vulnerable to wet rot decay. How to Prevent Wet Rot To prevent wet rot it is advisable to ensure all timber including window and door frames are well painted/protected from rain water. Ensure that all gutters, downpipes are free from defects or leaks. Ensure that sub floor ventilation is adequate and unblocked as poor ventilation will contribute greatly to any timber decay problems. Ensure any new timbers introduced to a building are isolated from masonry by the use of a physical membrane. Causes of Wet Rot Unprotected timber in direct contact with moisture Insufficient ventilation below suspended floors. Possible leaks from pipes and domestic appliances. Wet rot can affect any unprotected timber and joinery so regular maintenance is very importance.