Good morning,
Thank you for your enquiry.
You can use Dryrods in Stone built houses as long as there is a consistent mortar course to insert the rods into.
If the wall is thicker than the standard 9" then consideration could be given to using the Dryzone DPC Cream instead.
If you have any further enquiries please do not hesitate to get in touch and let us know.
Kind regards,
Mollie
Safeguard Europe Ltd
Do they work on old stone built houses ?