RISING DAMP WOODWORM WOOD ROT TANKING STRUCTURAL DEFECTS ABOUT US HOME

  

THAMES VALLEY PRESERVATION LTD

  
       

 

RISING DAMP

Rising damp is a capillary of water, rising through masonry from below to above ground level. Rising damp is normally indicated by high moisture levels at the base of the wall, reducing with increasing height.

Walls suffering from the effects of rising damp will have become contaminated with hygroscopic salts (mainly chlorides and nitrates) causing internal plaster to blister/blow and appear as damp circular patches with white 'tide mark' staining.

TREATMENT

Treatment for rising damp will involve the installation of a chemical damp proof course, using 'Dryzone'. This is a concentrated silane-siloxane cream for insertion into mortar courses to form a remedial damp proof course in existing walls.

PLASTERING

Once the injection has been completed and the old salt contaminated plaster has been removed to a minimum height of 1.2m we will then re-plaster the area using a washed sand and cement render mix with a combined waterproofing additive. A finishing coat of plaster is applied over this to blend in with existing.

OTHER CAUSES OF DAMP

TVP can provide a quotation for external maintenance work as part as our Associated Building Works.

One of the major causes of dampness is penetration by rain therefore the external areas of your house need to be inspected to eliminate possible sources of damp. Areas inspected will be:

  • Downpipes and hoppers too small or missing, blocked, corroded or damaged, leading to leakage or overflows and wetting of walls. Or downpipes discharging at base of walls.

  • External ground levels - checking ground levels are not too high and bridging the existing damp proof course.

  • External rendering - checking rendering is not touching the ground and allowing damp to be drawn up and bridge the existing damp proof course.

  • Obstructions, i.e. stored items, lean-to sheds, walls built against property.

  • Perished pointing and spoiled bricks allowing damp to penetrate. 

 GUARANTEE

We offer a company guarantee for all specialist remedial damp proofing, timber treatment and tanking works undertaken by TVP Ltd. Installations of chemical damp proof courses and timber treatments are issued with a twenty year guarantee and structural waterproofing with a ten year guarantee.

We can also provide for a small fee insured guarantees through the Guarantee Protection Insurance Ltd, these guarantees are only available through properly qualified and approved members.

 

      
         
             
         

Salt damaged plaster removed

    
       
   

New remedial re-plastering applied

    
       
             

RING NOW TO BOOK A SURVEY!

Tel: 01491 629923

Email: info@tvpres.demon.co.uk