Roofing questions
What is the cost to repair ridge tiles?

Q. I have a run of 40 ridge tiles which need to be removed from the roof and rebedded into place. There won't be any scaffolding needed, how much would it cost to replace my ridge tiles?

A. The cost per ridge tile on average is around £4-5 so you would need to multiply that by how many you need (40) and then make allowances for the labour of the roofing company to install them. The ridge tiles if all were to be replaced would cost £200 - £250 but it is likely the mortar can be cleaned off of most and they can be reused. The job should cost no more than £500

Clearing moss from a concrete tile roof?

If you want to clear moss off of the roof tiles, ridge tiles and other fittings on the roof a high pressure hose will do the job but beware moss can be quite slippery when wet therefore it could be potentially a very dangerous job to do yourself without the right equipment and tools

If clearing the moss is purely for cosmetic reasons beware that if using a high pressure hose mortar joints could be damaged in the process with the high pressure water blasting away any loose mortar or loose masonry etc. The roof may need some repairs after cleaning the moss off because if the water does break any mortar joints or cause damage it would be best to repair them to save problems with leaks later on


What happens when ridge tiles are missing from the roof?

When ridge tiles are missing, broken or cracked on the roof the roof felt underneath them could suffer from water damage because the ridge tile was acting as an additional barrier to the elements getting into the roof

Depending on the location of the missing, broken or cracked ridge tile(s) on the roof and the overall condition of the roof it is prudent to get this fixed really as soon as possible because if you don't there is a real risk that the ridge tiles will just get worse over time and will eventually allow water in. In the winter freeze and thawing can cause further damage as the ridge tiles will be subject to expansion and pressure from the frost and they will deteriorate. Leaving the ridge tiles missing from the roof means that when you get rain, snow and all the other weather conditions it can start wearing away at the roof felt (the final layer of protection) and eventually water can trickle into the roof and pool up and then run down into the ceiling\walls causing problems and damage

The cost of replacing missing ridge tile(s) now should be much better than just simply leaving the problem unfixed. Ridge tiles are quite inexpensive, new ones of all sorts of varieties and colours (clay and concrete ridge tiles) can be picked up easily from roofing centres and builders yards for cheap. The other option of course is if you want to try and match a replacement ridge tile to the other on your roof you could seek out a local reclamation yard and perhaps take the broken ridge tile\fragment of ridge tile with you to get a decent matching reclaimed ridge tile

If you are not confident of fitting the replacement ridge tile and bedding in with mortar yourself a local roofer should be able to do the work for you for a reasonable price and it is peace of mind that your roof has an extra layer of protection of the previously exposed roof felt and timbers to prolong the lifespan of the roof

Help new ridge tiles are a bright orange colour!

If the roof features some weathered ridge tiles and has at some point had some brand new replacement ridge tiles you may find that the new ones stick out like a sore thumb

The ridge tiles should naturally weather because moss and lychen will grow on the ridge tiles over time the same as the rest of the roof but it could take a number of years. What to do if you don't want to wait that long?:

If the ridge tile(s) are accessible you could try brushing some natural yoghurt on them and you will find that they will take on a weathered appearance much more quickly!

What about if the colour is completely different?:

You could try buying some external water based paint. Take your water based paint and thin it down with some water and paint on a test block or a spare roof or ridge tile a thin layer and allow to dry. If you have a black external paint you will notice that the tile is a lot darker after painting it. You can build up several layers to darken or even experiment with different colours to achieve the desired effect and can of course apply the natural yoghurt as above to also give it a weathered finish

Test it out on a spare tile or ridge first to see if it achieves the desired effect!

It is a common practice used to age stone/concrete quickly without having to wait for natural weathering

Why do you have to felt a roof?

The main reason that a roof is felted before installing roof tiles or slates is so that there is additional protection against the elements. It is essential to keep the roof watertight so if the roof tiles or slates have become damaged or there is an area where the water can get in there is secondary protection in the form of the roof felt to prevent water coming through the roof