Matching concrete roof tiles

Ianwzzz

I had a very small extension built 2 years ago and the roofer used some existing concrete roof tiles and some new roof tiles. He didn't put the new ones together so they are just all mixed up and the roof looks odd. After 2 years I was hoping the new tiles would blend in better with the old tiles but they don't. Does anyone know of anything I can do to get these newer tiles to match better.

Furts

You may have the wrong tiles, and a better colour match may be available. For example Redland do Farmhouse Orange and Farmhouse Red - there is not a huge difference between them in the eyes of an average consumer. Also a Farmhouse Red Redland will not be colour matched to a similar Marley tile.

Tiles also have a limited life and gradually wear away with the weather. They become thin. It is usual to do a roof with all new tiles to maximise life and minimise breakage with the old tiles. I am surprised at what your roofer has done.

You may be able to scrub up your old tiles to give a clean bright surface to match your new tiles. This assumes the correct colour match new tiles were fitted!

Ianwzzz

Thanks for your reply.
The tiles are definitely the same make and colour as I purchased them myself and had a few of the existing tiles that had not discoloured. I was thinking about cleaning the rest of the roof but that would be a big job.

A few years ago I googled this problem and found a spray that was supposed to age roof tiles. I have looked again recently but can't find anything about it.

Davesnave

Yogurt or sour milk painted onto new concrete troughs etc is supposed to 'age' them, by encouraging the growth of small organisms, like lichens.

Whether this works with roof tiles is probably less of an issue than whether it's really feasible to skate around on a roof locating individual ties to paint!

Furts

Ianwzzz wrote: »

Thanks for your reply.
The tiles are definitely the same make and colour as I purchased them myself and had a few of the existing tiles that had not discoloured. I was thinking about cleaning the rest of the roof but that would be a big job.

A few years ago I googled this problem and found a spray that was supposed to age roof tiles. I have looked again recently but can't find anything about it.

It is likely any chemicals applied to the roof tiles will invalidate the guarantee. Even pressure washing as loved by the traders in the traveling community is a problem area. I recall one of the tile manufacturers issuing a press release warning against this.