Hi,
I have posted in the past about our gulley flat roof, we paid someone good money to fix the leak and they didn't, they said it was a cracked tile so 'fixed' it with a tube of silicon sealant and a bit of cement. £495
Its been dry so was hard to know but sadly now rain is coming in hard we have the same problem with our flat roof, it leaks, the recent bad weather has been a pain.
Basically water ponds in this area so if theres a crack it will seep though. I think might also overlap the edge where the tiles meet the edge, maybe another row of tiles would have helped. Moss is/has also been a big contributor so I am working on that too as you can see.
I am competent. My solution is a bit out of the box but I think it makes sense. I am limited to the products I know about.
First I plan on tackling the rest of the roof moss with hydrochrolide 4% so far (see above) its done a decent enough job and any left is ideal for the patio. I need to do it when the moss is dry and will absorb.
Once that's completed I will strip back 2 or 3 rows of tiles. Done it before and its been ok.
this was a felt rip and moss/cracked tile all contributing to a leak at the other end of the flat roof , I am ok to take a few tiles off..
The bit i want advice on. Originally a lead roof it was cracking so we had it fibre glassed which I thought would be a forever fix but I think the edge didn't go high enough up the side.
3 things are happening now,
1. the water sits in the end and runs back on itself, ponding I think is the term, its not draining away.
2. That sitting water i think has or will find its way into small hairline cracks.
3. Wildlife, magpies mainly, they are absolute thugs and rip and tear at anything just for the fun of it, I think like a comedy sketch, pulling the threads on a jumper, they have pulled and hacked some of the edges away.
I have thought about this a lot and my plan is this. It needs to be sealed and water flowing properly. It is not flowing down the gulley becuase at the end it is tilting the wrong way.
So
1. Remove 2 or 3 rows of tiles in that area.
2. Clean it out then add 'exterior' self levelling compound raised slightly by putting a block across the end of the first 'step'.
3. Create a slight tilt by removing that block when its starting to set and pat it down to a tilt/slant away onto the rest of the roof.
4. When that's set paint over it to seal it with solution, like Acrypol roof coating.
5. Build it/paint it up high enough that the existing tiles and felt overlap and add rubber sheet if the edges don't meet the new higher level. Bond it in with the Acrypol so the whole thing is sealed.
6 (Poss). I have thought about adding some gutter at the base of the 2 corners to assist with water flow as I think a lot of the problem is that when it rains heavily the roof shunts a lot of water into that small area. Becuase when it doesn't rain heavily we don't seem to get so much of a problem.
I am sure its unusual to put self levelling compound on a roof but it makes sense to me to get the level and water moving. Coated with a layer (or 2) of Acrypol gives it watertightness and durability.
Or just straight in with normal cement and then coat with Arcypol ? Normal cement might be easier to work with and create a slope?.
Any flaws, thoughts or ideas please.
thanks as always,
PG
I have posted in the past about our gulley flat roof, we paid someone good money to fix the leak and they didn't, they said it was a cracked tile so 'fixed' it with a tube of silicon sealant and a bit of cement. £495
Its been dry so was hard to know but sadly now rain is coming in hard we have the same problem with our flat roof, it leaks, the recent bad weather has been a pain.
Basically water ponds in this area so if theres a crack it will seep though. I think might also overlap the edge where the tiles meet the edge, maybe another row of tiles would have helped. Moss is/has also been a big contributor so I am working on that too as you can see.
I am competent. My solution is a bit out of the box but I think it makes sense. I am limited to the products I know about.
First I plan on tackling the rest of the roof moss with hydrochrolide 4% so far (see above) its done a decent enough job and any left is ideal for the patio. I need to do it when the moss is dry and will absorb.
Once that's completed I will strip back 2 or 3 rows of tiles. Done it before and its been ok.
this was a felt rip and moss/cracked tile all contributing to a leak at the other end of the flat roof , I am ok to take a few tiles off..
The bit i want advice on. Originally a lead roof it was cracking so we had it fibre glassed which I thought would be a forever fix but I think the edge didn't go high enough up the side.
3 things are happening now,
1. the water sits in the end and runs back on itself, ponding I think is the term, its not draining away.
2. That sitting water i think has or will find its way into small hairline cracks.
3. Wildlife, magpies mainly, they are absolute thugs and rip and tear at anything just for the fun of it, I think like a comedy sketch, pulling the threads on a jumper, they have pulled and hacked some of the edges away.
I have thought about this a lot and my plan is this. It needs to be sealed and water flowing properly. It is not flowing down the gulley becuase at the end it is tilting the wrong way.
So
1. Remove 2 or 3 rows of tiles in that area.
2. Clean it out then add 'exterior' self levelling compound raised slightly by putting a block across the end of the first 'step'.
3. Create a slight tilt by removing that block when its starting to set and pat it down to a tilt/slant away onto the rest of the roof.
4. When that's set paint over it to seal it with solution, like Acrypol roof coating.
5. Build it/paint it up high enough that the existing tiles and felt overlap and add rubber sheet if the edges don't meet the new higher level. Bond it in with the Acrypol so the whole thing is sealed.
6 (Poss). I have thought about adding some gutter at the base of the 2 corners to assist with water flow as I think a lot of the problem is that when it rains heavily the roof shunts a lot of water into that small area. Becuase when it doesn't rain heavily we don't seem to get so much of a problem.
I am sure its unusual to put self levelling compound on a roof but it makes sense to me to get the level and water moving. Coated with a layer (or 2) of Acrypol gives it watertightness and durability.
Or just straight in with normal cement and then coat with Arcypol ? Normal cement might be easier to work with and create a slope?.
Any flaws, thoughts or ideas please.
thanks as always,
PG
