Dry Rot Sensors

Detect Dry Rot early,

before it damages your building

Property Repair Systems is OPEN FOR BUSINESS - 01626 872886

Where you can Speak to real people



Dry Rot Sensors detect Dry Rot - the sensor stick changes colour - giving advanced warning that investigation is required before damage is done.

Use our Dry Rot Sensors for detection of Dry Rot in wood, stone, brick, plaster - the colour change is easily detected - monitor a treated area or insert into an at risk damp area - saves valuable building materials and unnecessary expensive chemical treatments.

Click here to see Dry Rot Sensors, check prices or order in our Dry Rot Shop

What is the Dry Rot Sensor Stick?

* a simple to install treated wooden dowel that changes colour, from blue to yellow, in the presence of active Dry Rot

Dry Rot sticks, that change colour when dry rot occurs

What does a Dry Rot Sensor do for me?

* it allows you to tell if Dry Rot is present at its earliest stages, in timber or masonry, giving you an early warning that treatment is required before your building is damaged

How is a Dry Rot Sensor installed?

* by drilling an 8mm diameter hole to a depth of 110mm in the 'at risk' timber or masonry

How does a Dry Rot Sensor work?

* the blue detector dye, that is vacuum impregnated into the wooden stick, reacts to the chemical that Dry Rot produces - oxalic acid - at very low levels, turning the dye to yellow

Click here to see Dry Rot Sensors, check prices or order in our Dry Rot Shop

Dry Rot and other Wood Rotting Fungi

There are two main types of wood rotting fungi that attack damp timber in buildings, Wet rots and Dry rot. To buy rot treatment you need to know the difference between a variety of Wet rots and the unique Dry rot fungus, (Dry rot Latin name - Serpula lacrymans). This is because Dry rot can travel across dry areas made of any material to reach untreated wood to eat. Wet rots are confined to the wet areas only. However, areas of Wet rot that dry out can easily turn into Dry rot, as the dampness level falls into the range that Dry rot prefers. We provide Free Advice and Details of your Local Specialist to make sure that the diagnosis of Rot is correct and that we offer the correct chemical treatment for wood preservation and masonry (e.g. brick, stone, mortar) sterilisation.

All wood rots indicate a dampness problem. Damp in walls, floors and roofs must be tracked back to source and the cause of the damp treated (see www.dampness-info.co.uk).

Rots are woodland fungi frequently found in houses and commercial buildings where dampness has entered, usually as the result of leaking gutters, downpipes, drains or roofing. They requires an initial moisture content of about 18% in wood, but Dry rot, unlike the family of Wet Rots, can spread across dry areas and across surfaces treated with wood preservatives. This ability, unique to Dry Rot, to travel outside of the damp area makes it dangerous to wood in buildings. You can treat masonry and timbers with wood preservatives to perfection, but a small pocket of Dry Rot can still be capable of emerging across the treated area looking for new timber to attack.

Sometimes such an outbreak can emerge long after initial treatment, as the result of a new leak into the treated area. The treatment chemical is then over diluted by the water added from the new leak. This dilution effect occurs because Rot treatments have to be water soluble in order to penetrate damp masonry and timber.

Dry Rot spreads in walls and floors for many months or years before symptoms become visible. The symptoms can include Strands (like a plant root), Mycellium (a skin-like growth) or a Fruiting Body (the mushroom or Sporaphore). Go to www.dryrot.biz/dryrotpaint.htm for pictures and a comparison of Dry rot and Wet rot symptoms.

Surveyors can only see the surface symptoms and cannot predict the extent of a Dry Rot attack. This leads to extensive ripping out of sound building materials in order to be sure that the fungal attack has all been found.

The Dry Rot Stick or Sensor allows accurate diagnosis of Dry Rot and prevents Wet Rots from being misdiagnosed as Dry Rot - the stick simply changes colour from Blue to a blotchy yellow where active Dry Rot is present.

Sticks that have not changed colour can be left in place for long term monitoring, or moved to a new position.

Click here to see Dry Rot Sensors, check prices or order in our Dry Rot Shop

The advantages of Dry Rot Sensor Sticks:

* physical colour change proof of Dry Rot eliminates 'cowboy' selling by unqualified Contractors

* D.I.Y. - easy to fit, easy to check, be your own expert

* detects early signs, before they are visible and have caused more damage

* tested by Universities in Sweden and the UK

* moisture readings can be taken off the stick with our Damp Meter

Click here to see Dry Rot Sensors, check prices or order in our Dry Rot Shop

Don't let Dry Rot spread & destroy your building

Ring for Free Technical Support Now -

Call our experts David, Angela or Hayley on 01626 872886 for a 'Real Person' to chat about your needs, and Order Direct by phone


Click here to see Dry Rot Sensors, check prices or order in our Dry Rot Shop

Click for Home Page

How to treat and eradicate Dry Rot

1. Eliminate the moisture source and establish the extent by drill testing

2. Remove all decay back to sound timber.(Note - no need to cut back and scrap good wood))


Fruiting Body of Dry Rot

Fruiting Body of Dry Rot - note the red spore dust

3. Inject Boron B40 Gel, apply Boron B20 Brushing Gel and surface spray/brush with Boracol 10..

Click here to see Dry Rot Sensors, check prices or order in our Dry Rot Shop

Example of Dry Rot Treatment on Site

Manor House, Warwick - extensive infestation had resulted in massive areas of Dry Rot mycelium (skin) and sporophores (fruiting bodies - mushrooms) on timber and masonry. Previous treatments with conventional chemicals had failed to stop the spread of fungi. Boracol 10 was applied by spray to timber, masonry and sub-sites, Boracol B20 Gel to end grain and vulnerable surfaces, Boracol B40 Injection to 8-10mm holes drilled to prescribed hole pattern, to surrounding areas at least 300mm in all directions from the limits of the attack and to all timbers at or above 18% moisture content.


Dry Rot in a skirting board - late stage damag

Skirting Board being eaten by Dry Rot - could have been

detected early with a Dry Rot Sensor installed.

Click for Home Page

Speak to our Experts - David, Angela or Hayley - on 01626 872886

Click here to see Dry Rot Sensors, check prices or order in our Dry Rot Shop

Links | Privacy Policy

Returns Policy | Technical & Safety


Property Repair Systems,

T: 01626 872886

E: help@propertyrepairsystems.co.uk

Site written by: David Moore

David Moore, B.A. (Hons.), C.T.I.S., C.R.D.S. Technical Author