block paving causing damp in garage

[whatsthenews]

We inherited a fully block paved/flagged back/front garden.1960'S house.
Where it runs up the side of the house where the garage and utility room are, it sits a brick and a half below the DPC, but the issue is that the garage floor is below the level of the DPC so, as the water tends to pool slightly against the brickwork we end up with damp bits of floor stretching about 6 inches across the floor in the garage.
The block pavers are at right angles to the house on the last "course", so we've taken them out and removed some of the sub material, so at least now it's below garage floor level.Now we just need to remedy the drainage issue and then replace the pavers so they're not sitting against the wall.
Question is what's the best thing to do?
There's a surface water drain just where the side path emerges at the front corner of the garage (unfortunately the block paved path is sloped all wrong so water never makes it into this drain, unless we sweep it in) which I'm guessing could be used if we put some sort of drain in, or maybe an alternative would be just to dig down to 6" below garage floor level and fill with gravel? Not exactly sure how you go about putting a drain into the side of the surface water drain as we've neevr done it before.
The utiltity room FFL is a good 6 " above the garage floor level so just to say below the DPC,so we only get very minor damp bits at the moment, but we're in the process of insulating etc, so we've put DPM around the perimeter of the external walls, up the walls and across the floor about 2 ft.

 

[23vc]

Trouble with just digging a trench along the wall is even if it keeps the garage dry and is below dpc, you’re directing a load of surface water towards your footings. I’d try and get it to the existing surface drainage

 

[Tigercubrider]

Photos or diagrams would help.
You could consider fitting a drain like this channel

https://www.polychannel.co.uk/product/economy-channel-100-1mtr-a15-galvanised-6mm-slotted-grating/

Basically remove the edging bricks and dig down, then fit the drain to be level with the drive, but fit the drain angled, to feed into whatever existing drain you have.

 

[whatsthenews]

Photos or diagrams would help.
You could consider fitting a drain like this channel

https://www.polychannel.co.uk/product/economy-channel-100-1mtr-a15-galvanised-6mm-slotted-grating/

Basically remove the edging bricks and dig down, then fit the drain to be level with the drive, but fit the drain angled, to feed into whatever existing drain you have.

Yes, that's what I've been looking at. Do we need to set it in mortar? Mainly sand mixed with some ? hardcore there at the moment.It's the path up the side of the house and won't have any foot traffic on it as right against the house wall.

Trouble with just digging a trench along the wall is even if it keeps the garage dry and is below dpc, you’re directing a load of surface water towards your footings. I’d try and get it to the existing surface drainage

Agreed. Looking at the surface drain there's round bits on the side that look like they could be cut out with a hole saw. Presume you can get some sort of connector/adaptor that would go in the hole?
Thanks for the advice.

 

[23vc]

Yep, they should be, post a pic

 

[whatsthenews]

Yep, they should be, post a pic

Thanks 23vc.
Issue we might have is that the gap is 200 mm. Pavers are 100 mm as they were jammed right up against the house wall-took some brute force to get them out. There's a piddly little concreted channel against the retaining wall on the other side which maybe was meant to act as a drainage channel, but slope is all wrong so probably just the way it turned out!
Will we manage to get the 100 mm drain in and replace a row of pavers?

 

[Tigercubrider]

Yes dig out more than you need, so you get a fall- there are diy videos on YouTube showing the process.

You could replace the pavers, or cut them a bit smaller if they do't fit.
Or fill the gap with concrete. A much harder to achieve finish is to cut a line in the existing pavers to make room for a new row of edging.

 

[JohnD]

if you feel strong enough, you could lift the whole paved path, and relay it with a correct slope.

It's possible the pavers were laid on top of an existing gravel path and are therefore too high.

 

[whatsthenews]

Sorry for late reply

if you feel strong enough, you could lift the whole paved path, and relay it with a correct slope.

It's possible the pavers were laid on top of an existing gravel path and are therefore too high.

Looking at other properties, I think it was previously concrete. No traces of any concrete underneath now. The height of the paving is OK ish at about a brick and a half below the DPC, it's just that the garage floor is below the DPC level.
Haven't got the heart to remove them all and relay! TBH, its on the north facing side of the house, and there's a nasty brick retaining wall on the other side of the path, so it's all a bit nasty really! The retaining wall is very wet and covered in moss as there's no drainage in it.

Yes dig out more than you need, so you get a fall- there are diy videos on YouTube showing the process.

You could replace the pavers, or cut them a bit smaller if they do't fit.
Or fill the gap with concrete. A much harder to achieve finish is to cut a line in the existing pavers to make room for a new row of edging.

Just looking for the simplest solution to stop the garage floor getting wet
When it rains heavily, water from the paving on the back corner near to the side path tends to run across the back of the house and then when it reaches the corner, goes down the path, so from that point of view a drain would help us.
We don't have anything to cut the pavers with, but suppose we could hire something.

 

[Tigercubrider]

If you don't have anything, a cheap angle grinder can be used £25 upwards with a couple of stone cutting discs. Eye protection plus gloves/ boots.
If the moisture is only coming in under the garage door, a rubber seal can be fitted

 

[whatsthenews]

If you don't have anything, a cheap angle grinder can be used £25 upwards with a couple of stone cutting discs. Eye protection plus gloves/ boots.
If the moisture is only coming in under the garage door, a rubber seal can be fitted[/QUOTE
After I said we didn't have anything, I wondered if an angle grinder would do the trick.
No, it comes on along the bottom of the wall. Actually it's much better since we took the pavers out,so I'm sure the drain will work fine (with correct slope on it!) Is it best to put the drain onto some sort of mortar mix, or will it be OK set onto the sand/hardcore mix that's there at the moment? If we need a mix, what's best to use?
Thanks for the help