New roof; slate or tiled

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snipped-for-privacy@aol.com (TonyJeffs) wrote in message

That doesn't follow. It improves the odds, but by no means does it mean it must be strong enough.

I wuoldn't assume the tiles will be the right width to slot in just right myself. Chance says theyre more likely not to be. Now I've never done tile roofing, only slate, so if that's wrong perhaps a tiler will tell us.
But all in all from what you say it sounds like there are more points in favour of slates. Cheaper too, if you only need to buy 20% of what you need. And longer lived as well. And no structural iffies. The only minor negative is you'll need to make a standard joint.
Regards, NT
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TonyJeffs wrote:

This is certainly open to question. If you can visit, look along the ceiling/wall joins at the eaves side of some other houses. Often when slates are replaced with tiles the extra weight causes spreading which can open large cracks up - I have seen instances of 1" (25.4mm)!

Tiles will *look* better, as the row will be more similar than if you use slate.

Um, it won't do, these areas are the most prone to problem and whether tiled or slated, should be dealt with properly. That means that a 2x4" secret gutter should be constructed by your roofer on the party wall, and the tiles or slates should overlap that, meeting at the middle, with a gap of not more than 3/8" (10mm) between the edges. The secret gutter should be lined with lead, nailed and clipped in lengths appropriate to the pitch.
You also wrote:

The meeting should be straight, not "interlocked". You can get slates 1 1/2 normal size to deal with this issue.
I think your main concern should be to maintain the (changed but) uniform appearence of the terrace, so you will have to use tiles. Try to match each side, or if each side are different colours, blend in with a gradual mix from one side to the other. If you use tiles, re-inforcement/extra strapping should be carried out on your existing roof structure. This need not be expensive or technical, but is worthwhile (to prevent problems, and so that if you sell, you c an say it has been done, and the buyers will think what a thorough chap you are!).
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"N. Thornton" wrote:

Used English or Welsh slates are probably going to cost you 7-10% *more* than brand-new cheapo imported ones. There are good reasons for this!

Argh, please don't even think about bothering to do this!

It's not worth the bother even should it work temporarily. A new slate will last for a very long time and costs little, compared to the aggro of gluing up a slate that will stay glued for 6 months whereupon the effing thing will blow off in a strong breeze and launch itself sideways onto the roof of your car below.
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