When you have an issue with moss, algae or staining, it can be very tempting to want a pressure washer quite simply because the results seem like they would make things so much easier. However, softwashing is a far better alternative for the vast majority of tiled roofing, and it also lasts longer in most cases.
What is pressure washing?
Pressure washing is all about using high-pressure water to cut through the grime and growth on top of it. That works well on a driveway. On a roof, this can spell trouble, particularly if the tiles are older or more weathered.
Problems with pressure washing roof tiles
A strong jet can:
Crack or dislodge tiles (especially for older concrete-tiled roofs)
Remove the tile sealer, allowing mould to settle in
It would literally push water up under the tiles and into the underlay
Damage pointing, ridge tiles and flashing guttering
Cram moss into gutters and downpipes to generate mess quickly
What is softwashing?
Softwashing normally offers a low-pressure clean, usually accompanied by features like soap or biocide, which will kill existing moss, algae and lichen. Other companies will brush away moss, then apply the treatment to slow regrowth. For Roof Cleaning Gloucester, contact https://www.stagsoftwash.com/residential/roof-cleaning-gloucester
Why softwashing is usually safer
Softwashing is unlikely to damage tiles or drive water into the roof structure because it isn’t force-based. So it’s ideal for removing the “roots” of organic growth, not just moving what you can see.
So which should you choose?
Softwashing is generally recommended for the majority of tiled roofs (in conjunction with a moss removal and treatment programme). The other option would be to pressure wash in some circumstances, but again, only by a professional who can first determine the condition of the tile, pitch and gauge whether there is risk from water ingress.
