Advise to construct wooden fence on top wall

[bejay]

I need advise on suitable method to construct a wooden fence on top a boundary brick wall about 15 metres long.

The brick wall is about 3 foot high, double brick (8.5 inches wide). I want a wooden fence built on top the wall and brought forward before covering with featherboard up to about 3 and half feet high and to leave about an inch or two at the edge of the wall to prevent people sitting on it and to give privacy.

Can people give me an idea how best to construct this wall. I have a few ideas but wanted to see what the practical chaps think.

Thank you

 

[big-all]

front garden maximum 4ft rear garden 6ft7" without planning permision

there could be a covenant restricting the wall/fence style/height

your wall may or may not be able to support the wind loads inflicted by the fence panel

 

[Thermo]

not sure if youre building the wall or youve already got the wall there?

if not then two options, either closebaord it along the length, with posts set against the wall, and bought forward with a another post on top of the wall, or use intermedite piers and set wall plates against the piers, and use either closeboard or fence panels

Untitled

• Thermo
• 19 Jun 2010
• 1

 

[bejay]

Thanks for the replies.

The brick wall is the original boundary wall and has no piers. I want to build a fence on top the wall and bring it forward.

My idea has been to fix 3x3 inch posts about 6 foot high inside the wall about every 1.5 metres using several 6" thunderbolts. Then fix another vertical 3x3 post about 3 feet high on top the wall using 7 inch bolts to fix to the first upright. That brings me forward 3 inches. Then to bring it forward another 3 inches by fixing 2 3x3 posts horizontally to serve as arris rails at say 1 foot and 3 foot high these would be screwed into the vertical posts. To finish off screw on featherboard that would bring forward the wall about 7 inches. Does this sound a reasonable solution or are there alternative fixings and method to construct it, I wondered if it was too heavy or is it best to go for lightweight construction. too many questions.

 

[freddiemercurystwin]

As big-all mentioned, technically if the fence is to the boundary of the front garden Planning Permission would be required: http://www.planningportal.gov.uk/en...ommonfenceswallsgates/workmoreppfencewallgate

 

[bejay]

Hi
I should havementioned this fence is to my back garden.

 

[Thermo]

yes that sounds a reasonable way of doing it and it will be fairly strong option. if there is anyway of digging down teh face of the wall, so you can get the base of the posts in the ground it will improve its stability with regard to wind loading.


why does everyone always assume a boundary wall is on the front whenever the questions is asked???

 

[freddiemercurystwin]

prevent people sitting on it

Incidentally its not just the front boundary, PP is required when it fronts any road or its pavement

You will need to apply for planning permission if you wish to erect or add to a fence, wall or gate and:

* it would be over 1 metre high and next to a highway used by vehicles (or the footpath of such a highway); or over 2 metres high elsewhere

 

[freddiemercurystwin]

double post

 

[JMLanders]

Depending on how solid the existing wall is, there's nothing to stop you adding brick piers on top of it. Then you could trellis it and grow something over it - wysteria for example is fairly quick. You could even grow something with thorns on it for security.

 

[Deluks]

My idea has been to fix 3x3 inch posts about 6 foot high inside the wall about every 1.5 metres using several 6" thunderbolts. Then fix another vertical 3x3 post about 3 feet high on top the wall using 7 inch bolts to fix to the first upright. That brings me forward 3 inches. Then to bring it forward another 3 inches by fixing 2 3x3 posts horizontally to serve as arris rails at say 1 foot and 3 foot high these would be screwed into the vertical posts. To finish off screw on featherboard that would bring forward the wall about 7 inches. Does this sound a reasonable solution or are there alternative fixings and method to construct it, I wondered if it was too heavy or is it best to go for lightweight construction. too many questions.

Sounds like right dogs dinner. Your second run of posts are essentially spacers. I would use normal 3x3 posts with standard arris rails on top of the wall, and use a couple of wood blocks to space between the 6' and 3' posts. Maybe with a bolt or threaded rod going through all 3. (post, spacer, post)

 

[raebhoop]

I'm no carpenter but I'm happy enough with my efforts...cheap too.Decking boards just over £2 each B&Q.I've strapped every now and again with steel to beef it up against yobs.Got to stain it more yet,and cut an angle on those uprights so the rain runs off (forgot that).

 

[bejay]

Thanks for the replies and I agree with the dogs dinner comment and I liked the picture by raebhoop as a possible design for future work.

Last weekend following on fron Deluks we used 3" posts back of wall using 10mm thunderbolts and cut spacer blocks 6" long (3"x3") and screwed two of these into the vertical posts to support our simulated aris rails. We screwed onto the end of the spacers 1.5"x3" timber between the posts to serve as aris rail for the featherboard. It looks good but the horrible 10mm thunderblots have started to move on some of the vertical posts, we've had to screw on plates to the vertical posts and rawlplugs to hold them to the wall.

Can you suggest how we can beef up the vertical posts, they run from the top of the ground up the 3 foot high wall and secured by 3 thunderbolts

We have more fencing to do what would be suggested to fix the post to the wall.

 

[JMLanders]

As you're bolting into the wall, it is possible to drill right the way through and use long coach bolts and nuts, with any excess of stubs being sawn/grinded off.

 

[bejay]

Tha coach bolts sound like a solid answer to holding up posts, its possible and will have to check it out, but it would have been nice to have reliable fittings to hold up a 3x3 post without having to drill through the entire wall.