Dormer tiles fallen off

[saxbyd123]

Hi

I had a loft extension built two years ago, very happy with it. However last autumn ago two tiles fell off from the side of the dormer. The tiles are from the top row of tiles (see photo). I thought it was odd that tiles should fall off so soon, and it wasn't during any particularly bad weather/strong winds. I noticed that the tiles seem to have adhesive/mastic on the back and no nail holes, looking at the tiles one of the has come down almost whole, so it's not as if it has broken off, with the nails still in the batten.

I had some other work done recently and asked the builder to take a look, he was a bit shocked that the tiles were fixed on using mastic/silicone/adhesive and recommended all the tiles along the top row be replaced and re-fixed. He said it looked like the tiles had been cut down to size then fixed on.

Obviously I'm quite worried as I don't know if any other tiles will fall off and if a tile had struck someone on the head it could cause serious damage.

Does anyone know if this is an acceptable/standard way of fixing vertical hung tiles onto a dormer? I feel like the firm that built the dormer should be putting this right.

 

[robinbanks]

Does anyone know if this is an acceptable/standard way of fixing vertical hung tiles onto a dormer?

Er.. I know it's not!?

(There are a couple of people on this forum that probably would pop along and claim that a couple of dabs of mastic is ideal for attaching dormer vertical tiles, but IMHO they would be wrong)

By all means bond tiles to reduce wind lift/rattle/damage, but not as the primary fixing; that should be mechanical

 

[Koolpc]

Roofer was lazy...

 

[^woody^]

If you use a suitable polymer grab adhesive it will be fine, and stops a lot of messing about.

Brick slips and other stone/ceramic units are stuck to walls with adhesive.

 

[datarebal]

No it's not acceptable . All vertical tiles should be mechanically fixed.
In this case the battening has not been set out correctly .

 

[johnny2007]

Roofer was lazy...

That was not a roofer.
Op if you have solid timber under those tiles on first row, I would use a 5mm diamond drill bit and make a hole in every tile just below the soffit.
Then use stainless steel screws to fix them and avoid any risk of cracking someone's head.
Why not nails? I hear you asking.
Because with screws you'll be able to control the tightening force and will avoid cracking the tiles with a hammer blow.

 

[ree]

The top courses need removing - the battens re-set - full plain tiles re-set & fixed - top/eaves tiles fixed to battens - and flashing used over the top/eaves tiles.