Installing patio doors in single story garage.

[jmhill]

Happy New Year.

I want to turn my garage into a home office and want to install patio doors in one side by creating one big aperture where the widows are now. It’s single skin brick construction. What should I use above the doors to support the roof?

Thanks,

Jon

 

[Deleted member 292770]

whats the span?

 

[jmhill]

Apologies it’s 2.4m oh and there is a pilaster in the middle.

 

[oldbutnotdead]

Mmm. Removing that buttress won't be ideal...

 

[Deleted member 292770]

travis perkins do a 2.7m conc lintel. i’d probably double them up with a row of concrete blocks. looks a bit high for a full height door.
Other people will have other ideas.

 

[stuart45]

Mmm. Removing that buttress won't be ideal...

It won't, but he will have to build piers both sides of the frame jambs.

 

[^woody^]

You've got a false ridge and roof sag, so you may want to look at the supports to the roof rafters generally, and whether there is need for additional horizontal restraint of the rafter ends, not just support above the door.

 

[mikeey84]

You've got a false ridge and roof sag, so you may want to look at the supports to the roof rafters generally, and whether there is need for additional horizontal restraint of the rafter ends, not just support above the door.

What's a false ridge?

 

[jks7492]

Depends on the height to the top of the doors and how much masonry you end up keeping above the lintel, but i'd go for an off the shelf steel lintel - something like a Catnic CCS.

You could use a concrete lintel but at a 2.4m span it'll weigh an absolute tonne and be a pain to install as a DIY job if you're doing it by yourself...

 

[stuart45]

What's a false ridge?

Google Dummy pitched roof.

 

[^woody^]

What's a false ridge?

Looks like it might have a flat roof at the top, but it may well be a normal double pitched roof.

 

[jmhill]

Hi thanks for all the helpful comments. I’m going to re tile the roof and add some roof lights so will replace any rotten or damaged timbers when I do.

 

[jmhill]

It’s a hip roof btw. That’s next doors chimney behind.

 

[^woody^]

Right. But there is still apparent sag in the roof, and you may want to investigate that and design in some support/restraint as necessary, not just jump straight to a lintel support.

Also, with single skin walls, it can be difficult to fit the required depth lintel or beam above the frame as there is little room between the frame head and the wall plate/rafters. So forming piers either side of the opening and setting the lintel/beam back, allows it to fit below the rafters.

Double/treble timbers bolted to create a beam are often OK in these situations, and save messing about with brickwork, but steel beams might have less depth if space is tight