Garage Extension - bit of advice needed

[Smiler.]

Looking at building an office on the side of the garage.




Could anyone in the know tell me if:

1. I need planning permission
2. The new sloping roof effort is possible/good idea
3. They have a recommendation of an honest, reliable & quality builder in the Berkshire area.

Thanks in advance

[rsv gone!]

The roof looks terrible and many roof tiles couldn't be laid at such a shallow pitch; driving rain would get underneath them.

Far better to re-use the existing tiles and to create a new hipped roof.

[Smiler.]

rsv gone! said:

The roof looks terrible and many roof tiles couldn't be laid at such a shallow pitch; driving rain would get underneath them.

Far better to re-use the existing tiles and to create a new hipped roof.

Yeah, it's typically naff.

What's the minimum height to the top I'd need?

Edited by Smiler. on Saturday 23 July 11:30

[Pothole]

My BiL is a builder and says:

"Hi

1. He may well need planning permission but if he takes the sketch down to the local council they will confirm/deny. It's permitted to extend the footprint of a property by 30% but this includes conservatories so depends on what else has been done since the house was originally built. He will also need building control approval.

2. The roof probably won't work & the planners may not like it. However there are other types of materials that may work if he still wants pitched rather than flat.

3. If you got to our website (url on request) & then click on the ***** Building button you can see some houses we built in Shinfield (which is in Berkshire). Discount for MAG, CAMRA or RAT members."

So if you want a quote, he'll do you one. PM me.

[Smiler.]

Thanks Pothole, pm sent.

MAG = motorcycles ?
CAMRA = beer?
RAT = ?

If so, 2 out of 3

[Pothole]

Smiler. said:

Thanks Pothole, pm sent.

MAG = motorcycles ?
CAMRA = beer?
RAT = ?

If so, 2 out of 3

RAT is like HOG for Triumph riders, but you've qualified enough, I reckon.

[Smiler.]

Pothole said:

Smiler. said:

Thanks Pothole, pm sent.

MAG = motorcycles ?
CAMRA = beer?
RAT = ?

If so, 2 out of 3

RAT is like HOG for Triumph riders, but you've qualified enough, I reckon.

Beer & Motorcycles - I like him already

I've got a revised sketch showing a hipped roof (or my effort of one) as RSV suggested.

It's likely to require planning as the place was substantially modified about 10 years ago, when the garage was built.

This addition will be fairly innocuous IMO (well I would say that).

A flat roof is not really feasible but my proposal with the hipped roof is half the height of the existing one.

[Busa mav]

Pothole said:

My BiL is a builder and says:

It's permitted to extend the footprint of a property by 30% but this includes conservatories so depends on what else has been done since the house was originally built.

sorry to be a pain ,

but that informations is so so incorrect and bears absolutely no relation to any permitted development rules in any shape or form.

[Pothole]

Busa mav said:

Pothole said:

My BiL is a builder and says:

It's permitted to extend the footprint of a property by 30% but this includes conservatories so depends on what else has been done since the house was originally built.

sorry to be a pain ,

but that informations is so so incorrect and bears absolutely no relation to any permitted development rules in any shape or form.

I suspect it's missing 'without permission' but I'm no builder. Amazing he's managed to build a successful firm over the last 20 years with such poor knowledge, though.

[rsv gone!]

Smiler. said:

A flat roof is not really feasible but my proposal with the hipped roof is half the height of the existing one.

It would depend on the tiles you have but halving the height will greatly reduce the angle.

Have a look here for minimum pitches of a lot of Redland products (for example);

http://www.monier.co.uk/fileadmin/bu-files/uk/Curr...


(Looking back at your sketch of the existing, the current roof pitch is around the minimum for many tiles).

[98elise]

Pothole said:

I suspect it's missing 'without permission' but I'm no builder. Amazing he's managed to build a successful firm over the last 20 years with such poor knowledge, though.

Builders rarely know building regs, they know how to follow drawings. We used a well respected local builder for our house extension, and I knew more about building regs than he did. I'm sure there are some that do but you really don't need it as a builder, thats the job of the architect/structural engineer.

[Smiler.]

Thanks RSV. Here is the latest effort. The pitch is 12/4 (18°) at it's shallowest.




I've been on the Redland website & it seems that 22.5° is the minimum pitch that can use anything other than slate.

[Busa mav]

There are others that go much shallower

The regent can get to 12.5 , but the life saver for all those with plain tiles is the sandtoft 20 / 20 which can now manage 15 ' with an increased head lap .

[Smiler.]

Busa mav said:

There are others that go much shallower

The regent can get to 12.5 , but the life saver for all those with plain tiles is the sandtoft 20 / 20 which can now manage 15 ' with an increased head lap .

Thanks. Are you in roof design by any chance?

I reckon that on this job, it will require the most design input & attention to detail during constriction (as it has to join to the existing).

[rsv gone!]

You've got some pretty awkward junctions and shallow valleys on that design.

I wouldn't want to spend your money but if it was me, I'd work out what tiles were there already. I'd then strip the roof, retain the existing tiles and put a new hipped roof across the whole structure. I'd then just buy some more of the same tile (maybe mixing with existing).

Or alternatively, go for a flat roof and get a decent single-ply roof put on; like Sarnafil or one of its cheaper rivals.

[Busa mav]

Smiler. said:

Thanks. Are you in roof design by any chance?

I reckon that on this job, it will require the most design input & attention to detail during constriction (as it has to join to the existing).

No smiler , I am just a simple drawerer of plans , so have the need to keep an eye on what tiles can be used in shallow pitch situations .

With the new pitch so different from the original , you must keep an eye on the tiles coursing through , if they don't , it will truly look a pigs ear .
It is this coursing malarky that will put your pitch at risk and it needs working out before you commit to a tile / design

[Smiler.]

I see your point RSV, but the existing roof is very high & I'm fairly sure I won't get planning if I extend the whole thing across.

There isn't enough height to put on a flat roof as it stands.

[Jgtv]

Smiler. said:

L

1. They have a recommendation of an honest, reliable & quality builder in the Berkshire area.

Where abouts in berkshire are you?

[Smiler.]

Jgtv said:

Where abouts in berkshire are you?

Just east of Reading

[Busa mav]

Smiler. said:

Just east of Reading

Thats Whitley Wood