Here is another question asked by a member of the public relating to treating concrete roof tiles. We hope that it and the answer, which we include below, are useful.

I am looking to treat my roof (concrete tiles) after I have removed all the moss thats up there! Is Super Seal Water Repellent the best stuff for the job?

If so, what is the best method of application? Access is pretty easy and I also have a Backpack sprayer (perhaps not the best option as the product is solvent-based).

Here's our answer:

You can use Super Seal Water Repellent for this application but make sure that you block off the gutters when applying to prevent the excess running into the surface water drainage. You can apply the product with a sprayer with a coarse nozzle. Clean after use with white spirit.

If you have a question, that you'd like us to answer, please email John Oxley: john@constructionchemicals.co.uk

Construction Chemaicals offer a free 'Ask John' service and he will be happy to answer any questions you have.