Replacement Velux

filbert the fox

A velux window started to rot on the roof of my sunroom. The company blamed water ingress from a faulty screw connection on the weatherproofing strip.

Anyway I got a replacement which is still in the box at home with weatherproofing supplied separately.

I'm finding it very hard to convince myself that I wouldn't do a better job than an installer/roofer.

So how difficult is it to replace a Velux window on a single storey roof?

Calahonda52

How big is the window and whats the roofing material?

It can be done from the inside, assuming you have suitable access/support, and can lift out the window out of the frame.

filbert the fox

Calahonda52 wrote: »

How big is the window and whats the roofing material?

It can be done from the inside, assuming you have suitable access/support, and can lift out the window out of the frame.

There is easy access to the single storey roof.

It's the frame that's rotten so that needs to be done.

The size is 118 x 78 - roof is coloured cement roof tiles

Calahonda52

Roof access is never easy and is a high risk activity.

I have done 8 in my own house, never stepped outside

The frame fits between the rafters and is held in place by angle brackets so if u do it right u can leave them in place.

Therefore the frame will pass up from below, just make sure to check it for square before u fix it

Look up the weight of the 118 by 78, its not going to be light.

The roof tiles are easy to deal with, just photograph the set up before u start

filbert the fox

Calahonda52 wrote: »

Roof access is never easy and is a high risk activity.

I have done 8 in my own house, never stepped outside

The frame fits between the rafters and is held in place by angle brackets so if u do it right u can leave them in place.

Therefore the frame will pass up from below, just make sure to check it for square before u fix it

Look up the weight of the 118 by 78, its not going to be light.

The roof tiles are easy to deal with, just photograph the set up before u start

BTW how do the weather strips get fitted from the inside?


I presume I remove the window and affix it later when the frame is in situ?

Calahonda52

There is a lock screw on the window which u screw in AFAIR and the window will then swing all the way around and drop out so be careful, assuming centre hung.

You then get standing on something so as you are out through the window looking down on the slates:
bottom flashing: (u may be able to reuse it if u are care full, save a lot of flattening out of the lead, assuming its lead, I did mine in 1990.. so may have changed
side flashings fit into bottom,
top flashing fits into sides.

Open the flashing set out and lay out on floor

filbert the fox

Calahonda52 wrote: »

There is a lock screw on the window which u screw in AFAIR and the window will then swing all the way around and drop out so be careful, assuming centre hung.

You then get standing on something so as you are out through the window looking down on the slates:
bottom flashing: (u may be able to reuse it if u are care full, save a lot of flattening out of the lead, assuming its lead, I did mine in 1990.. so may have changed
side flashings fit into bottom,
top flashing fits into sides.

Open the flashing set out and lay out on floor

Thanks for that - maybe need advice which is somewhat less than 25 years old!

Bonzo Delaney

filbert the fox wrote: »

Thanks for that - maybe need advice which is somewhat less than 25 years old!

They haven't changed that much in 25 years instead of the brackets on the side they are on the corners now and one each side on the long ones
The flashing is much the same " if it ain't broke don't fix it " set up. And the frames are of a sleeker profile. But once the old one is out the new one will just sit back In it's place.
Pick a fine day read the instructions carrfully an extra pair of hand would be handy for a first timer take your time and all can be done from inside