Dry Rot

Diagnosis of any sources of moisture by a qualified timber surveyor is critical to curing Dry Rot.

Because of the nature of dry rot it is important that the opening up (removal of floors and plaster) to investigate the extent of the outbreak is carried out under the supervision of the qualified Maclennan remedial surveyor so as the full extent of the Dry Rot can be ascertained and drawn and mapped out but without causing unnecessary destruction to unaffected areas and finishes which may be unnecessary or of historical importance. If an area of timber or plaster affected by Dry Rot is of historical importance then every effort should be made to conserve it by drying , isolating and if necessary treating with Boron. The area or building element should then be monitored either visually or with Dry Rot sensors and damp sensors which are now available through Maclennan.

Isolation of all timbers from damp masonry is essential as a long term cure for the Dry Rot.

Treatment with Boron can be carried out to help prevent further outbreaks.

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    DRY ROT
    – Causing Floorboards To Crumble
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    DRY ROT
    – Causing joist To Crumble
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    DRY ROT
    – Effects Wood And Spreads Through Brickwork
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    DRY ROT
    – Dry Rot ( Sporophore ) Spreading Under Floor
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As a masonry biocide B10 will effectively eradicate spores and Fungal Growth in the wall. B20 will work very effectively on damp masonry and will remain in dry wood as a defence should it become damp at which point the B20 would move into the wood to give further protection. All new timber used in repairs should be pre-treated with a wood preservative.

Detailed guidance on the treatment required for various timber components is given in the British Standard BS 5268: Part 5, which deals specifically with structural timber, and BS 5589 which covers a wider range of uses. Guidance is also given on the use of naturally durable timbers (see also Digest 429 published by the Building Research Establishment Ltd).

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