Jet washing roof tiles on house

poppellerant

I don't see the problem with power washing roof tiles, as long as it's done from above and pointing down.

I'm not sure why you'd want to seal the tiles, I would have thought that you'd want something to discourage the moss from growing back. Does such a thing does exist?

After cleaning and perhaps treating the tiles, I'd imagine the most important thing to do would be to check the pointing on the roof and for any dislodged or loose tiles.

cyclonebri1

ey143 wrote: »

That doesn't leave me with a clean roof though - still looks dirty.

It's called charachter, get them removed, sell them to some London Yuppie and you will have new tiles and cash to spare.

In other words don't do it unless your next project is stone cladding;)

Cakey87

nobulljusttruth wrote: »

YES it should cost no more that £20 sq mtr. for clean. repair and coat. If they really do 2 coats, it has to be done over two days. If they do not use the undercoat, or coat over wet pointing in the ridges or valleys this is also wrong.

sorry

Thank you for this advise i have put in a complaint to this company and are withholding any funds being released until i get a sensible invoice.

rooflover

I hate to point out, but if it's done correctly, on the right tiles, repointed and checked after, it won't be a problem. It's when clay tiles are jet washed poorly, or the pointing blasting out, that serious problems occur. Working on a roof is not an issue if the correct H&S equipment is available. Brushing moss off can also be a suitable alternative. I even raked the worst off my own roof last year - not the best idea but it got the worst off!

cyclonebri1

I still fail to see the point in pressure washing tiled roofs. All it can do is remove material and accelerate failing. Many tiles are sand coated, this is designed to hold back rainwater and allows tiles to be laid at a lower angle. This wears off with age, check what's left in the gutters if you don't believe me, boosting this wearing process with a pressure hose serves no useful purpose at all.