leaky roof.......

**benlovesnuk** · 14-09-2011, 09:24 PM

Hi everybody, I have small leaks in the concrete roof tiles, is there anything i can put on top to seal, or underneath to move the water away?
Its a pitched roof 2 sides nothing fancy or technical in joins.

I have an all wood frame and baton system, if possible i dont want to hide it, I would rather pay to re-roof the house with a better tile. I dont mind using a foam/fibre sheet to underlay and then put roof tiles back on top.

Any nice suggestions, or helpful advice would be greatly appreciated!

**Loy Toy** · 14-09-2011, 09:46 PM

I have used this product before and another mate just had his whole roof insulated which not only stopped the leaks but also brought the house internal temperature down by at least 5 degrees centigrade so he says.

Ask for a quote from Karl.

http://www.lohr-trade.com/

**DrAndy** · 14-09-2011, 10:18 PM

Originally Posted by benlovesnuk

I have small leaks in the concrete roof tiles

how do the tiles leak? mine did because the slope was not steep enough, and the manufacturer actually specified the minimum slope

Putting the aluminium foil insulation will not stop the leaks, but, if there are no rips after laying, it will guide the water down and out from under the tiles

**benlovesnuk** · 14-09-2011, 10:27 PM

Hi Loy Toy, thank you for your quick advice.

I have seen this but im not sure it will work in my house.

Its still being built and is a traditional Lanna house from wood, with wood frame roof not metal. I was planning to leave the roof open or at least the rafters exposed, covering just the batons. So spraying the roof would be too messy. I think people have had problems with it pushing tiles off the battens also.

Is there anyway of laying felt fabric and then tiling again, also sealing the tiles from the top?

I would be most greatful for any help. cheers

**Loy Toy** · 14-09-2011, 10:38 PM

Originally Posted by benlovesnuk

Hi Loy Toy, thank you for your quick advice.

My pleasure Ben.

This Geo-fabric is a great insulator and we used it along with the Atlantic Drainage System.

geofabric (geotextile) ZEMTEX > insulation | FASTRADE s.r.o.

I'm sure it would work well with regard to your dilemma.

**DrAndy** · 14-09-2011, 10:40 PM

Originally Posted by benlovesnuk

Is there anyway of laying felt fabric and then tiling again

of course, that is standard in the UK, but you might as well have the insulating foil laid carefully to get a better overall result

**benlovesnuk** · 14-09-2011, 10:58 PM

Originally Posted by DrAndy

Originally Posted by benlovesnuk

I have small leaks in the concrete roof tiles

how do the tiles leak? mine did because the slope was not steep enough, and the manufacturer actually specified the minimum slope

Putting the aluminium foil insulation will not stop the leaks, but, if there are no rips after laying, it will guide the water down and out from under the tiles

Hi Dr.A yes basically the slope is to gradual i think, this has led to wind driven rain to push up and through, the leaks are small because of this but unwanted.

I was thinking maybe as it might be only in hard storms, that batons and felt might do the trick, as you say to carry the water away to the over hangs.

These are the tiles we have.

Would there be any inexpensive solution to this problem of angles????

Thanks for the help.

**DrAndy** · 14-09-2011, 11:02 PM

as said, put some batons over insulating foil (it is like felt but shiny, then rehang the tiles

it is unfortunate that you will be able to see it from the inside; I lined the roof with bamboo board, which looks good

**benlovesnuk** · 14-09-2011, 11:03 PM

Originally Posted by DrAndy

Originally Posted by benlovesnuk

Is there anyway of laying felt fabric and then tiling again

of course, that is standard in the UK, but you might as well have the insulating foil laid carefully to get a better overall result

This is the underneath, do you think i could get away with filing it with insulation? Do i then need to create ventilation for hot air anywhere?

Is there a method of painting the tiles with a sealant? As i quite like looking up at the ceiling.

Cheers

**dirtydog** · 14-09-2011, 11:09 PM

Not enough slope for the roof, you will always have problems with driven rain water, best advice is Drandys, but strong storms and you will get puddles occasionally.

**benlovesnuk** · 14-09-2011, 11:10 PM

Originally Posted by DrAndy

as said, put some batons over insulating foil (it is like felt but shiny, then rehang the tiles

it is unfortunate that you will be able to see it from the inside; I lined the roof with bamboo board, which looks good

We were thinking of having some bamboo lining, but its a very small weave not so big almost like fabric. When you say rehang the tiles, doesnt the insulation go underneath the batten and the tile? Sorry not with it.

Confused.

**benlovesnuk** · 14-09-2011, 11:17 PM

Are you saying the tiles and battens need to come off?

My mind cant think visually very well.

**benlovesnuk** · 14-09-2011, 11:33 PM

Would it be better in the long run, to fix wooden boards to rafters and then a waterproof barrier, then batten and then tiles?

Or is there another way?

Cheers

**DrAndy** · 15-09-2011, 12:59 AM

you will have to take the tiles off, yes

boarding the roof with wood, or bamboo sheet, can then be done, but that may make the roof too flat so any water may get trapped by the battens

so put the insulation over the beams, then the battens

then rehang the tiles

better to board the roof from the inside, over the beams is easiest, but you could do it between if you put small wood supports

it will be nice to look up at the beams and board

**Thetyim** · 15-09-2011, 08:27 AM

Originally Posted by benlovesnuk

Is there a method of painting the tiles with a sealant?

You could try using Epoxy paint. That is used to waterproof boats.

**rickschoppers** · 15-09-2011, 08:33 AM

Originally Posted by dirtydog

Not enough slope for the roof, you will always have problems with driven rain water, best advice is Drandys, but strong storms and you will get puddles occasionally.

DD, what's the angle range for a roof to avoid this problem then?

**Loy Toy** · 15-09-2011, 08:43 AM

I truly can't see what the issue is here.

Yes, the roof pitch is too shallow and rain coming in at certain angles will mean leaking but to cover the batons with a good geo-fabric sheet will certainly mean no leaks full stop.

If done correctly the result, looking from underneath and when standing within the house should look superb.

Get the tiles off, lay down the fabric and re-lay the tiles.

**VocalNeal** · 15-09-2011, 09:40 AM

What about acrylic or silicone based sealants? They could be sprayed upwards to get into any gaps.
bosny.com : R.J London Chemical Co., Ltd. we are leader in spray paint & DIY's Chemicals

Might do the job if the price is right.

**pkspirate** · 15-09-2011, 09:43 AM

Originally Posted by benlovesnuk

Originally Posted by DrAndy

Originally Posted by benlovesnuk

Is there anyway of laying felt fabric and then tiling again

of course, that is standard in the UK, but you might as well have the insulating foil laid carefully to get a better overall result

<img>

This is the underneath, do you think i could get away with filing it with insulation? Do i then need to create ventilation for hot air anywhere?

Is there a method of painting the tiles with a sealant? As i quite like looking up at the ceiling.

Cheers

its not a very attractive ceiling. just seal from underneath.

**DrAndy** · 15-09-2011, 01:35 PM

Originally Posted by rickschoppers

Originally Posted by dirtydog

Not enough slope for the roof, you will always have problems with driven rain water, best advice is Drandys, but strong storms and you will get puddles occasionally.

DD, what's the angle range for a roof to avoid this problem then?

depending on the type of tiles, about 25-30 degrees, say, but it can vary a lot

the big wavy tiles can be overlapped more so you can have a lower angle, for instance

the normal concrete tiles have a smaller overlap, so need at least 25/30 degrees

**benlovesnuk** · 15-09-2011, 02:49 PM

Originally Posted by Thetyim

Originally Posted by benlovesnuk

Is there a method of painting the tiles with a sealant?

You could try using Epoxy paint. That is used to waterproof boats.

Hi Thanks for that, i think epoxy over concrete might be odd, i think epoxy resin is because boat hulls are made fibre glass so it works. OF course i know nothing about boats, or much else for that matter but i will take a look.

**DrAndy** · 15-09-2011, 02:53 PM

painting the tiles would not work, and would look terrible

strip them off and do a proper job

**benlovesnuk** · 15-09-2011, 02:54 PM

Originally Posted by Loy Toy

I truly can't see what the issue is here.

Yes, the roof pitch is too shallow and rain coming in at certain angles will mean leaking but to cover the batons with a good geo-fabric sheet will certainly mean no leaks full stop.

If done correctly the result, looking from underneath and when standing within the house should look superb.

Get the tiles off, lay down the fabric and re-lay the tiles.

These is no issue, im just a little confused when people use words rather than images to describe this type of thing, (no offense to DR. A) i dont know what beam means?? etc. Its confusing to my small brain.

When you say Geo fabric, do you know of a good brand?

Thanks in advance.

**Thetyim** · 15-09-2011, 02:54 PM

^ ^ ^
It is used on wooden boats.
Comes as a 2 pack that you mix before brushing on.

I have no idea if it will work on roof tiles.
The heat might be a problem

**Thetyim** · 15-09-2011, 02:57 PM

Originally Posted by DrAndy

painting the tiles would not work,

Well it works in Cornwall.
They use a cement wash over slate tiles

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