Leaking glazed roof - outhouse

[Richini]

Good afternoon,

 

We currently have a totally glazed out house roof and due a variety of reasons; leaking and hugely cold in winter, we are investigating changing this to a standard tiled roof. 

 

The outhouse is only single brick construction.

On removing some internal trim at the roof / wall connection, it seems there is a metal strip joining the two. Below this metal strip for just about half the outhouse length is a window and door directly, no brick or lintel.

 

My question then is with this construction, how will we go about installing rafters for the tiled roof? Is it possible?

 

I've attached a couple images to hopefully show what I'm trying to explain.

 

Thanks.

[Conor]

You don't have the fall for a tiled roof, you'll have to go for a flat roof of some type.  You'll likely need to build a new structure to take it - at the very min a couple steel posts and beam across on the glazed side. You'd replace the glazing while your at it. Gets expensive quickly if its done right! That's also probably why the existing roof is leaking water isn't clearing fast enough and it's getting through the joins.

[Richini]

Conor, 

 

Thanks for the information.

Pitch angle seems to only be about 4 degrees. 

Not sure why its so blurry, but i've attached an image taken from the outside. 

Sorry to be a pain, but are you able to elaborate on the works I'd need to do, to put a proper roof on?

Looking to get a good understanding of the work required before I get quotes in etc. Thanks.

 

[Conor]

Ah, didn't see the solid wall. Looks like there's no brick course on top of the door and side window? To install a proper roof, you'd want a lintel / course above the door to take the roof joists. A flat roof would work well here as you can reduce the fall to 1⁰. But you'll not get much insulation in it.

 

Is this part of your heated envelope of the house or outside? Sounds like it's separated so any insulation a bonus, not a need. And I don't think you'd need building control either.

 

I'd phone a couple local builders and see if they can come round and price up. It's a pretty straightforward job.

[Richini]

There's no brick course on top of the door or window on the left of that picture. Only the 120mm deep metal frame, shown below, runs across the whole length. 

 

The outhouse is separated from the main house by a UPVC door. 

 

[twice round the block]

This is just a conservatory surly.

You need to make more changes than just a roof to retain  heat if you've only got a single skin wall.

Have you thought about demolishing it and put in planning for a proper extension?

Does this link to the house through a patio door?

[Richini]

Thanks for the response. The roof definitely feels a bit conservatory like. The outhouse is an original feature with these houses, most houses have the original corrugated roof still fitted. Linked to house through a single uPVC door. 

[PeterW]

That’s a standard conservatory rail beam with what looks like Opal polycarbonate in a pretty standard profile system.

 

The reason it’s cold isn’t just the roof it’s the walls !! Single skin with no insulation is guaranteed to be cold. You could line it with a 4x2 frame full filled with Insulation and set 25mm in from the wall to give a cavity and then build the roof off the timber framing, you’d need to work out the bit above the door and window but it’s all pretty do-able. Flat roof and remove the coping stones and fly the roof over the brickwork.
 

Would need to watch the floor levels and ensure you’ve got a proper DPM but other than that it’s not a big job as @Conor says.