Roofing question
Author
Discussion

A500leroy

Original Poster:

7,626 posts

140 months

Sunday 18th September 2022
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Just been in my loft and where the tiles meet each other, in some places you can see day light. (1930s ex council semi). Normal?

Wacky Racer

40,481 posts

269 months

Sunday 18th September 2022
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Is there any sign that rain has been getting in?

CoolHands

22,036 posts

217 months

Sunday 18th September 2022
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Don’t go in the loft. Problem solved

trickywoo

13,506 posts

252 months

Sunday 18th September 2022
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Pretty normal but you should have felt / membrane between the rafters and tiles which should block most light coming through the edge of the tiles.

Bluetec350

126 posts

61 months

Sunday 18th September 2022
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trickywoo said:
Pretty normal but you should have felt / membrane between the rafters and tiles which should block most light coming through the edge of the tiles.
This has not always been the case, my parents had a 1930's house which had no sarking felt, as did my 1906 house before we had it re roofed

dave_s13

13,970 posts

291 months

Sunday 18th September 2022
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Ours is a 1930s semi. Slate tiles, no felt, you can see daylight through the overlap.

It doesn't leak thankfully.

A500leroy

Original Poster:

7,626 posts

140 months

Sunday 18th September 2022
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Cheers fellas, maybe something to insulate at some point, though I have a feeling its been done to vent the roof space.

Hereward

4,853 posts

252 months

Sunday 18th September 2022
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Same as mine. It's bone dry. The bonus is that your loft space will be well ventilated!

Make sure you have plenty of insulation at the joist level and ensure pipes / tanks are well insulated too.

Edited by Hereward on Sunday 18th September 10:02

A500leroy

Original Poster:

7,626 posts

140 months

Sunday 18th September 2022
quotequote all
Hereward said:
Same as mine. It's bone dry. The bonus is that your loft space will be well ventilated!

Make sure you have plenty of insulation at the joist level and ensure pipes / tanks are well insulated too.

Edited by Hereward on Sunday 18th September 10:02
Funnily enough I was launching some more insulation up there to do do at a later date when I noticed!

imck

811 posts

129 months

Sunday 18th September 2022
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No felt in the original part of our 1930s with slate.
I wouldn't be putting anything under the tiles/rafters
Make sure loft/pipe insulation is sufficient and walk away.

Drawweight

3,457 posts

138 months

Sunday 18th September 2022
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No felting on my old council house either.

Just tiles on battens.

In the winter snow used to blow under the tiles and build up on top of the ceiling and drip through when it thawed.

BertyFish

673 posts

186 months

Tuesday 20th September 2022
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I’ve had a 30s house and you could look out through the tiles, never leaked but it was hard to keep clean in there.

We’re at a house at the moment and the roof isn’t great, torching falling away had a repair to one pitch….
looks like it might need the tiles off, new felt and tiles back.

The tiles are concrete and I’ve been told they only have around a 50 year life span and the house is 1940s.

Sounding expensive.

PH.sausages

64 posts

118 months

Tuesday 20th September 2022
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It's not that unusual to see light coming through in places. As long as it's not leaking it's all good.

A cold roof should be well ventilated, so any further insulation should be above the ceiling rather than between the rafters.

BertyFish

673 posts

186 months

Tuesday 20th September 2022
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Worry on this house is one pitch on the side has had tiles removed and felted then pointed on ridge,
This was ober 10 years back and nothing else touched.




Lotobear

8,540 posts

150 months

Tuesday 20th September 2022
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I'm a surveyor and have seen hundreds of houses without roofing felt where the torching has dropped off as inevitably it does. It rarely causes a problem from an ingress point of view but it's usually a pretty good 'marker' that the roof is approaching the end of it's life as it confirms its age. Though I have seen plenty of Honister slate roofs copper nailed that are still good well over 100 years after laying.

Also worth remembering that, contrary to common belief, the principal purpose of underlay or torching (or sarking in Scotland) is to control wind +/- pressure in the roof space and keep the coverings on the roof. Catching stray drips is secondary - if the pitch and lap is correct for the exposure there should not be any ingress regardless.

eein

1,541 posts

287 months

Tuesday 20th September 2022
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My house is 1939 and had just the tiles. I had them all taken off, felt down and re-battoned and tiles put back. Made a huge difference to the loft space and eliminated all the dust and crap that used to get in over time. I've now boarded the inside of the rafters (with open gap behind for ventilation, painted white and LED lights, double insulated the floor, boarded to the edge and put carpet tiles down. Now a clean and bright space to store lots of crap instead of the dirty musty space it was before. Whis I'd done it sooner as the rest of the house does not have lots of storage.

A500leroy

Original Poster:

7,626 posts

140 months

Monday 26th January
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Stupid question, flashing around a chimney, should it go over or under the roof tiles?

trickywoo

13,506 posts

252 months

Monday 26th January
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A500leroy said:
Stupid question, flashing around a chimney, should it go over or under the roof tiles?
Both. Generally under on the sides and over on the front. Sometimes with heavily ridged tiles the lead will be over on the sides as well.

A500leroy

Original Poster:

7,626 posts

140 months

Monday 26th January
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Thanks! Looks like the roofer I had has done it right then.

wolfracesonic

8,762 posts

149 months

Monday 26th January
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Lead flashings are the ones that fit to the side of the chimney and are turned into the brickwork, giving a sawtooth effect(usually). Lead soakers are the ones that lay on the roof, sometimes they sit between the tiles and are unseen, sometimes they sit on top and are visible, it depends on the type of tile.