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GDL Damp Proofing are leaders in solving rising damp and other damp related issues. We have successfully provided treatment for private homes, heritage and commercial projects throughout Sydney and country NSW. If you would like our team to assess your situation, or to find out more about our services, reach out today.




GDL Damp Proofing have provided effective solutions to rising damp (sometimes referred to as Salt Damp) and other damp related issues for over thirty years.

We have successfully completed many private homes, heritage and commercial projects throughout Sydney and regional NSW, Victoria and QLD.

We are in constant demand from leading architects, builders and home owners due to our huge success rate in solving difficult and sometimes complex problems.


  1. We actually know what we are doing, over 30 years experience.
  2. We are extremely clean tradesmen, respecting your property like no other.
  3. We use genuine Westox products at competitive rates.
  4. Written 20yr guarantee.
  5. Friendly and knowledgeable staff, making your job process a pleasure.

CALL US NOW: 0403 811 206

GDL Damp Proofing are one of the original WESTOX approved contractors and proudly continue to use the WESTOX Chemical Damp Proof Course system that has been in use in the UK for over 50 years. The WESTOX DPC System is the preferred method chosen by Sydney’s top architects. GDL Damp Proofing offer a complete rising damp treatment service with render removal, installation of a new Damp Proof Course WESTOX DPC and re-plastering. We are extremely clean, receiving constant praise from our clients.

We also use the latest products for WATERPROOFING of wet areas, decks, retaining walls and planter boxes.

Our FIVE coat system to wet areas has proven a number one choice for peace of mind when considering leaks are a major problem within the building industry.

Concrete slabs treated with ‘DENSI-CRETE’ by CONTREAT, a unique integral moisture barrier forming a permanent waterproof gel within concrete that will last the life of your concrete. Superior curing and waterproofing of concrete, minimal site disruption and eliminates expensive downtime. Saves TIME and MONEY.

We also remove salt from brick and stone using WESTOX Cocoon desalination process. We also address ventilation and brick cavity issues.

Correct analysis and solving damp problems is our passion and we actually enjoy what we do!


If your property needs damp proofing, please don’t hesitate to get in touch with our experienced Sydney-based team for effective rising damp treatment.

Call us now on 0403 811 206 and you’ll find friendly, knowledgeable and reliable customer service.



Congratulations! You have an excellent team to work with. They are punctual, polite, and professional in the way they carry out their tasks. I will certainly recommend your services. Thank you again

- Phill from Leichhardt

last year I bought a 1906 Federation house in Stanmore which had extensive rising damp and salt contaminated plaster… Because of the damp soil under the house GDL also installed ducted underfloor ventilation… I was very pleased with the conduct of the work and I’m very pleased with the outcome.

- Bill

I’d rather wait and get you guys to do the job, its just not worth using anyone else, Justin Benson Builder eastern suburbs

- Justin Benson

You guys did an amazing job, and all the guys were very respectful and professional.

- Hine from Leichhardt