Balconies, walkways and terraces take footfall as well as weather. Our GRP systems use heavier matting and non-slip finishes so they stay safe and watertight for decades.
We lay a heavier 600g matting for strength, then finish with a non-slip surface, either an aggregate or slate-granule finish, over a fully seamless waterproof layer. No trip-prone joins, no lifting edges.
GRP suits any surface that needs to be both walked on and waterproof, from a single balcony to a full communal deck.
Every Smartseal roof comes in your choice of 92 BS4800 colours, with a smooth or non-slip finish to suit the job.
See the full palette & finishesYes. We add a sanded or aggregate finish that gives grip underfoot in the wet, without losing the seamless waterproofing, ideal for balconies, walkways and terraces.
Yes. GRP is one continuous bonded layer with no joints, so there is nowhere for water to get through, which matters most on a balcony over living space.
Often yes, if the substrate is sound. We inspect first and prepare or replace the deck where needed so the GRP has a solid base.
It is backed by our 25-year guarantee, and these walkable, low-maintenance surfaces typically last well beyond that with minimal upkeep.
Accredited & approved
A director will visit, measure up and talk you through colours and finishes. No pressure, no follow-up sales calls.