Fitting window

[ninja432]

Can I get some advice on the procedure for fitting a new window in the single brick wall of my garage? I am going to get a brand new double glazed unit.

 

The old original timber one is approx 106x188cm, seems to be not a common size, so I think I'll need a custom made unit. It appears to just be secured with screws and  bit of mortar so shouldn't be too difficult to remove.

 

 

 

 

[Onoff]

Measure existing window and get new one made to that. I did a drawing for mine when I replaced a couple:

 

 

 

 

Don't forget about the cill:

 

 

 

I made some wooden wedges up:

 

 

Trial fitted:

 

 

Wedged and LOW EXPANSION FOAMED:

 

 

An excellent alternative to expanding foam is an expanding foam tape like Compriband. Comes on a roll and is about 1/4" thick. You have to be quick. Unroll and stick around the window frame and cill. 3rd picture above, the tape sits between the raised ribs. Whack into the hole and the tape swells to about 40mm thick max. 

 

I then drilled thru and fixed the frame using these:

 

 

Then glazed from the inside and fitted the glazing strips:

 

 

You'll have to apply a silicone bead externally on yours.

 

Easy job yours. I hadn't done one since years before but the good people here all chipped in. Replaced two now and a door.

 

 

Edited July 8, 2019 by Onoff

[ninja432]

Great thanks. Seems quite straightforward. 

 

So no cementing necessary then?

 

Am now trying to think of a reason why I need a window sill. I am converting the garage inside. A stud wall and a wooden frame will be made to surround the window. The original has a sill outside but surely it doesn't matter if I just buy the window with out a sill and fit it? 

[PeterW]

On 08/07/2019 at 17:36, ninja432 said:

The old original timber one is approx 106x188cm, seems to be not a common size, so I think I'll need a custom made unit. 

 

1050 x 1820 is standard

 

4 minutes ago, ninja432 said:

. A stud wall and a wooden frame will be made to surround the window. The original has a sill outside but surely it doesn't matter if I just buy the window with out a sill and fit it? 

 

So if this is being framed internally and you have cladding externally, can you not just make the opening to meet the window ..? Pretty simple to do. 

 

Alternate is go for a pair of 1050x900 side by side and put a timber post down the middle. Assuming BRegs don’t apply here, you can pretty much do what you want. 

 

And a cill is a must - stops water tracking back under the frame. 

[bassanclan]

Even if you have a stone cill/sill I would suggest having a stub sill/cill

[Big Jimbo]

23 minutes ago, bassanclan said:

Even if you have a stone cill/sill I would suggest having a stub sill/cill

+1 for above.

[ninja432]

Ok I will get a sill for sure. PeterW, nice ideas but purely to keep things simple and so I don't have to bother cladding on the outside, Ill just get the custom made windows.

 

I am noticing that the windows I'm looking at come with a sill 100mm wider than the frame. My original window has a sill exactly the same width as the frame. Is this bad? I was thinking Ill just get them to make the sill the same width as the frame?

[Onoff]

2 hours ago, ninja432 said:

So no cementing necessary then?

 

If you get the size bang on you could just silicone it. Have another measure and you might find it's a standard size. Sometimes you need to chip away a bit of mortar to see the frame edges. In my case my external walls were rendered so I had to make good. I braced some strips of timber to render up to.

 

 

You can also get various upvc trim profiles to cover the edges. It's a big thing for so called "professional" installers to whack in undersized windows with damn great gaps, not fill them with foam or Compriband and put trim on to make things look good. Double glazed windows with huge gaps...the original windows were often less draughty!

 

 

[ninja432]

OK thanks. I'm still wondering what to do about the sill. The original sill is exactly the same width as the frame. Is this ok to have it like this? I'm noticing all the windows come with a sill that is wider than the frame.

[Onoff]

You can cut cills down easy enough with a FINE tipped blade in a chop saw to match the window width. You might get away with a general purpose blade but it can go wrong and shatter it. Whatever, if you cut it get rid of the wispy, hairy bits with the tip of a Stanley blade etc.

 

You get end caps for the cills you stick on with mitre bond to help stop water and creepy crawlies getting into the cill.

 

 

(Ignore the bit of trim with holes in, I was just gauging for render depth and thd eventual proper trim).

 

In this case the original cill was wider than the window so I just went with it.

 

 

This one I cut the cill to the window width: