Replacing Flat Roof With Pitched

[Emilian]

I have a 1960's semi with a partially integral garage (1/3 integral and 2/3 poke out front with flat roof).

I am looking to convert this space to a utility and an extra reception at the front. I have read around forum and am looking for some general advice to help make my mind up as to best direction to take in some areas.

Neighbour has already converted his garage 'as is' retaining flat roof. I am however looking to put a pitched roof on instead of flat and knock the single skinned side wall down (flat roofed front 2/3 of garage which sticks out from house)and rebuild pushing out approx 3.5 feet into 7 ft space at side of house. Idea is that it makes reception room slightly bigger and leaves side access to property. Existing garage is approx 9ft wide but would be narrowish room once studded or double skinned - hence desire to widen. I am however at this stage trying to get a very approximate cost for this to help indicate whether it is worth it. I am keen to do as much as possible myself for the satisfaction and will see what i can manage (happy to pay trade though where it may stretch me). Im perhaps keen to get a guide of what it may cost for trade to do roof though so i can review what it may cost worse case to weigh up worth of extending/reroofing to just converting as is.

Pitched roof size would be approx 10ft (depth) x 12.5ft (width) (main house is tiled) - would need to link to a tile hung (top half) front facia of house (would be traditional pitched roof not a lean too style).

Any other advice on the following would also be useful:

- How to / how easy is it to link this new roof to tile hung front of house

- There is a drainage inspection cover (screwed down) in middle of garage floor - i think neighbour put in a timber floor (will check - unfortunately not the person who originally did the works) and provided access cover - what are the pros and cons between timber or concreting floors.

- How do you best determine roof pitch - ie are there minimums.

Also quick Q to the really helpful fella who built the summerhouse - did i read in a thread that you formed the structure around bolt together concrete sections - are these like you would find in a concrete garage ? I was thinking of buying a 2nd hand c/crete garage to form bassis of outbuilding at bottom of garden to use as shed/w/shop/partial summer-room and then cladding it more aesthetically - did yours work out cheaper than buying one of the B&Q or other types and were there any complications ?

Will try to post some pics of house/garage later if this helps.

Hope someone can give some general advice as some topics /responses on this site seem excellent.

Thanks in advance of any help

Emilian

(sorry if i have made any simple mistakes - i'm obviously no expert but am keen to learn and get satisfaction from doing things myself where it isnt to the detriment of the end result)

 

[masona]

Any other advice on the following would also be useful

Your very best bet is to pop down to your Building Control Office with a rough drawing and they will be able to give you their free advice and costs of doing it. You will need building permission which is straight forward. We cannot give quote as it varies in difference area and have no idea what is needed.

How do you best determine roof pitch - ie are there minimums.

Normally the minimum is 15 degree although I have seen 12 degree pitch but must have the correct tiles for the angle. It's to do with rain passing underneath the tiles and hit the weather groove and run back down again.

Also quick Q to the really helpful fella who built the summerhouse - did i read in a thread that you formed the structure around bolt together concrete sections - are these like you would find in a concrete garage ? I was thinking of buying a 2nd hand c/crete garage to form bassis of outbuilding at bottom of garden to use as shed/w/shop/partial summer-room and then cladding it more aesthetically - did yours work out cheaper than buying one of the B&Q or other types and were there any complications ?

Yes you did and a lot cheaper if you do it yourself. No need to buy a 2nd hand garage, just buy the 2nd precast slab section ( a fine hairline crack) which cost me £15 each. The reason I went that route because it's still precast slab from the neighbour side which I can't get to for treating it as it's against the fence, so I just treat the timber cladding on the 3 sides. The first summerhouse I've built is 30' x 9' would've cost me approx £14,000 bearing in mind this is from the company who specialise in timber summerhouse kit section. The summerhouse cost me roughly £2,400. I have got carried away and built another 2 summerhouse forming a L-shape

Will try to post some pics of house/garage later if this helps.

Would help as others may give you some design idea.