ROT TREATMENTS WITH BORON BASED LIQUID
Treating Dry Rot with Disodium Octaborate Tetrahydrate (Borax). Treatment with
Boron dissolved in water to kill Dry Rot in brick, stone, mortar, concrete, plaster
and soil. This Dry Rot treatment is odourless and has no vapour, so is completely
safe to apply by brush or low pressure spray.
Dry Rot can spread under, over and through masonry walls and floors, these can
often hide the strands, mycellium skin and fruiting bodies in joints, cracks and
cavities. Treatment of any area or void into which strands, mycellium or a fruiting
body of dry rot is growing must continue at least 300mm in all directions, to
avoid missing any of the tiny micro strands that precede the main visible parts
of the fungal growth.
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IT REALLY DRY ROT - first identify the rot type in order to decide the extent
of the treatment
Strands - fibres like small plant roots, dirty off-white to silver grey in colour.
Sheets - Mycelium - dirty off-white skin, can be tinged with yellow, occasionally
found as billowing cushions of off-white growths.
Mushroom - Fruiting Body - this produces the Spores - rust red in colour, can
spread around onto other surfaces, usually found as a flat body with red spores
in the centre and an off-white rim.
Rot - large splits, curvature and strands.
on wood - NOT brilliant white.
Dry Rot Sporophore - flat & red rust coloured.
DRY ROT - THEN IT IS ONE OF MANY WET ROTS - most commonly
Coniophora puteana - the 'cellar fungus' - dark brown to black strands in fern-like
patterns, olive brown fruiting body (rare).
Fibroporia vaillantii - white strands in fern like growths, white fruiting body
- brilliant white, fine strands, fruiting body has no pores, mycelium has tiny
star structures, visible only under magnification.
rot - brown to black strands of Coniophora.
White strands and Mycellium of Fibroporia
White strands and Mycellium of Fibroporia - both Wet Rots - NOT Dry Rot.
DRY ROT - Boron treatment
best, safest and most pleasant treatment to apply is Boron
Ultra 12, a water based 'biostat' that has no adverse effect on non-wood boring
insects or mammals (like Bats). This Boron Products is applied as two or more
coats by brush or spray and soaks quickly into the masonry and any adjacent timber.
It is permanent and, unlike its main rivals, it has no vapour and no smell. It
can only affect wood rotting fungi and wood boring insects, so Bats (a protected
species) are not affected - their main food, the house fly, does not eat wood
and so it never contains any preservative. Heavily infested areas of timber, and
damp patches, should also have an application of
Boron Ultra Gel, to reduce the risks of future rot and provide extra active
ingredient. Permanently or seasonally damp wood needs injection with Boron
Ultra Paste and the insertion of Boron
Ultra Rods (for example, window frames, garden posts, door frames).
so called 're-entry time', set by the HSE for every Pesticide, is only 1 hour,
or until dry, whichever is the longer. Pet birds and fish are not at risk from
Boron-based preservatives when used as specified, but do NOT apply Permethrin
based alternatives (found in most DIY stores) if you keep any pets, particularly
fish - Permethrin is lethal to fish in minute quantities.
PRECAUTIONS TO PREVENT THE SPREAD OF DRY ROT - Dry Rot Paint
photograph below shows untreated panels, on the left and treated panels on the
right. The treated panels (in two columns) have been painted with Dry Rot Paint
and show no signs of growth!
you can further reduce the risk of future Dry Rot attack by using this 'No Go
Zone' special emulsion paint. It can be applied behind skirting boards, in window
frame reveals and in joist sockets. The paint, which has been tested by BRE (Building
Research Establishment - Government backed test Authority) prevents Dry Rot from
passing across treated areas. No other treatment can currently offer this feature.
you need any help with any type of Wood Treatment or identification of wood rotting
fungi Property Repair Systems staff will be pleased to give you completely free,
no obligation advice on 01626 331351.
US FOR HELP TO IDENTIFY YOUR FUNGUS - 01626 331351 - Fungus Help Line
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written by: David
B.A. (Hons.), C.T.I.S., C.R.D.S. Technical Author