Weight of slate roof versus weight of cement tile roof replacement?

[N_Cook]

Or as tile and slate seems about the same weight per sq foot, what is the
amount of overlap for slates and for tiles?

[harry]

On 28 Sep, 09:18, "N_Cook" <dive...@tcp.co.uk> wrote:
> Or as tile and slate seems about the same weight per sq foot, what is the
> amount of overlap for slates and for tiles?

I would have thought slate was lighter.
You don't say if the tiles are interlocking or not, or how big they
are or, the pitch (steepness) of the roof, or if you are in a very
exposed position. All these hae a bearing.
The tile manufacturers will tell you all their recommendations, it's
no use here anyone conjecturing.

For slates it depends also on whether they are top nailed or centre
nailed.
If centre nailed, the battens are the distance apart [centre to
centre] that the nail holes are from the top of the slate. (Assuming
they are pre-drilled)

[tim....]

"harry" <harol...@aol.com> wrote in message
news:c452740e-286c-4e81...@m15g2000yqm.googlegroups.com...

> On 28 Sep, 09:18, "N_Cook" <dive...@tcp.co.uk> wrote:
>> Or as tile and slate seems about the same weight per sq foot, what is the
>> amount of overlap for slates and for tiles?
>
> I would have thought slate was lighter.

certainly against cement tiles.

I can't remember the prog but on one recent house buying program the buyer
had to pay for a strengthen roof because the previous owner had replaced
slate with concrete and the roof had stated to collapse.

tim

[d...@gglz.com]

On 28 Sep, 14:36, "tim...." <tims_new_h...@yahoo.co.uk> wrote:
> "harry" <haroldhr...@aol.com> wrote in message

There's plenty of deeply bowed roofs around here, where cheapskates
have used concrete tiles to replace the original slate on older
buildings.

[harry]

> buildings.- Hide quoted text -
>
> - Show quoted text -

A lot of these trussed roofs are bowed too. Some of them not so old
either. I watch with interest to see when or if the process stops:-)

[The Natural Philosopher]

ITYWF the original material was most likely thatch.

Only wood shingles are as light as thatch is.

Even pantiles will sag a roof designed for thatch, and they are about
the second lightest I can think of.

[dennis@home]

<d...@gglz.com> wrote in message
news:7157e3f3-e5e5-43cc...@e14g2000yqe.googlegroups.com...

> There's plenty of deeply bowed roofs around here, where cheapskates
> have used concrete tiles to replace the original slate on older
> buildings.

I'm a cheap skate, I went into a roofing place today and scrounged enough
slates to do a new roof.

It was a bird table though. 8-)

[JTM]

In article <8ge9af...@mid.individual.net>, tim....

<tims_n...@yahoo.co.uk> wrote:
> > I would have thought slate was lighter.

> certainly against cement tiles.

> I can't remember the prog but on one recent house buying
> program the buyer had to pay for a strengthen roof
> because the previous owner had replaced slate with
> concrete and the roof had stated to collapse.

We've recently replaced our slates (looked like cheap
Spanish) with tiles more in keeping with the area (SW
France) and the builder put another big purlin ? each side

--
John Mulrooney
NOTE Email address IS correct but might not be checked for a while.

I wonder if she buys make-up for both her faces?

[The Medway Handyman]

N_Cook wrote:
> Or as tile and slate seems about the same weight per sq foot, what is
> the amount of overlap for slates and for tiles?

Dunno. But around here there are hundreds of Victorian terraced houses.
Those with slate roofs are fine, those with concrete tile all have a
pronounced 'dip' in the ridge.

I believe its a good idea to reinforce the roof structure to avoid this.

--
Dave - The Medway Handyman
www.medwayhandyman.co.uk

[Bob Eager]

On Tue, 28 Sep 2010 22:20:34 +0100, The Medway Handyman wrote:

> N_Cook wrote:
>> Or as tile and slate seems about the same weight per sq foot, what is
>> the amount of overlap for slates and for tiles?
>
> Dunno. But around here there are hundreds of Victorian terraced houses.
> Those with slate roofs are fine, those with concrete tile all have a
> pronounced 'dip' in the ridge.
>
> I believe its a good idea to reinforce the roof structure to avoid this.

Our house (1903) was originally slate roofed. There used to be a roofing
company right next door, and they re-did the whole lot at once before we
moved, in with cement tiles.

Our surveyor picked this up and recommended reinforcement. Best idea
would have been new purlins, but that was too major, so we ended up
having supports for the purlins internally. That's been fine for 16 years.

--
Use the BIG mirror service in the UK:
http://www.mirrorservice.org

*lightning protection* - a w_tom conductor

[d...@gglz.com]

> ITYWF the original material was most likely thatch.
>
> Only wood shingles are as light as thatch is.
>
> Even pantiles will sag a roof designed for thatch, and they are about
> the second lightest I can think of.

Nah - often happens in the middle of a terrace of slate roofs.

Former thatched buildings round here can usually be identified by the
steeper roof pitch - around 50-55 degrees.

Usually these are done over with sagging red clay pantiles (though
that may be due to roughly hewn roof timbers on buildings of that
age).

On these pre-Victorian properties, usually with fairly random masonry,
sagging roofs on pantiles look like character - though I'm not the
person inside having to live inside with the roof leaks.

Sagging concrete tiles otoh, just look terrible - inappropriate to the
building, glaring disjoint to neighbouring properties etc.

[N_Cook]

I hollared up to a roofer of 30 years scrabbling, reroofing in the same road
today. He did not know a specific ratio but reckoned a cement tile roof is 3
times as heavy, for the same roof-scape. His unseen mate on the rear roof
reckoned about the same

[george [dicegeorge]]

David Ireland's book 'How to rescue a House'
says concrete are 4 times heavier than slate

[g]

[dennis@home]

"george [dicegeorge]" <diceg...@hotmail.com> wrote in message
news:i84hdo$m2f$1...@news.enta.net...

You can get fibre cement "slates" that look OK, they probably don't weigh
anymore than real slate and i doubt if anyone could spot them from the
ground. They are cheaper too, i was given some that are about 60cm x 30cm
and they retail for about 70p.
>
> [g]