Treatment C. Dry Rot Treatment (D.R.T.)
Almost without exception the elimination of dry rot is a two stage process.
Stage 1. Exposure Works
Elimination of the cause of attack (as for W.R.T.) together with exploratory works. These exploratory works, such as the removal of plaster and defective timbers, are designed to establish and define the full extent of the attack. A report of these findings is prepared and then you can get by tender a range of fixed price quotations for the next stage, viz:
Stage 2. Treatment Works
Owing to the persistent and often hidden nature of the attack by this fungus, it is often necessary to carry out extensive ancillary works in addition to timber replacement. The nature and extent of these ancillary works will be carefully and unambiguously detailed in the report we prepare for you and will include some or all of the following:-
1. Any necessary removal of structurally defective timbers affected by the fungus which can no longer serve their purpose. The possible removal of apparently sound timbers a minimal distance from the nearest visible decay to check for hidden decay within the cross section of the timber as determined on site by ATICS or the operative if sufficiently skilled and experienced.
2. The removal of all plaster/rendering within the specified, affected area and up to 1m beyond as determined by our surveyor. This, to be followed by the brushing down or vacuuming of exposed brickwork.
3. For timber, Surface Treatment with Fungicidal Fluid (S.T.F.F.) or application of a preservative paste and/or for masonry, a masonry biocide, in a manner and to an extent detailed in the report. For timber this treatment is likely to be restricted to wet, large section timbers at risk and for masonry may include the drilling of holes at staggered centres around the perimeter of the exposed brickwork such as to form toxic barriers through and around the affected masonry.
4. Replastering with any cementitious or lime plasters, for example a sand;cement render or 'Limelite' renovating (vermiculite lightweight aggregate and gypsum and lime plaster) and a gypsum finish. Renewing of any ceiling surfaces using plasterboard together with a finish coat of retarded semi-hydrate board finish such as 'Thistle'. Fungicidal plaster can be used in special circumstances in accordance with any manufacturer's specifications.
5. For areas not due for plastering, such as reveals, apply two coats of fungicidal paint/slurry to all brickwork to which treatment timbers are to abut.
6. Install suitable, treated replacement timbers as detailed in the report.