Wednesday, February 2, 2011

Wrapping house and fitting windows and doors

Now we had finished fitting, fixing and bracing the roof framing, it was now the roofers job to come along and lay the corrugated iron roof and fix the guttering.
Next we needed to wrap the house with building wrap. One of us held the roll at the top, one supported the wrap along the bottom of the house and we had guys stapling as we went round the perimeter. The building wrap is used to protect the wood framing from water that can penetrate the exterior cladding, it wont let water through. Moisture from humidity can also get trapped in walls and cause the wood to rot, the wrap is breathable so it eliminates that problem that building paper can cause.
Next we needed to cut the window and door openings and there was a special way to do this.

  We cut at 45 degree angles at the corners to the centre then along, allowing us to have wrap that can be pulled around the window and door framing to continue the protection from water traveling.
We stapled in these plastic window flashing's to protect against leeks
We used the window and door sealing tap Alu band. We measured 200mm up the side from each corner and measured to have enough to cover the base and 200mm up the next side.
The Alu band is stuck down hanging over the exterior side only and cut at the corners and folded down.
Whats called a butterfly piece is cut to join these two pieces for water tightness.
The blue plastic strip is stapled round the perimeter of the house at two levels on the walls to aid the staples in stopping the building wrap from blowing out.
Inserting the aluminium windows and doors was next.
First the cavity battens that go vertically at each door or window must be fixed. We have them protruding past the sill and below the door frame 50mm.

These had to all sit at the same height, so when we come to laying the weather boards we wont have to cut them to fit around widows and doors all at slightly different heights, it'll all be the same and it will look better.
After fitting the front ranch sliding unit, we measured the height and marked it on a long piece of timber and used this mark to line up the rest of the windows and doors in the house.
We used wedges and blocks to straighten, level and centre the aluminium units.
The windows and doors needed to be set so they were 10mm inside the rooms to allow for the Gib board to be flush against the window and door units, we used the thickness of our rulers as a guide.
We then fixed them with galvanised nails with the head protruding.
Here is my laundry door and window unit temporarily fixed level and at the correct height


Mean while the vermin strip is getting fixed along the base of the house, it has small holes for moisture and water to escape but protects from mice etc getting into the walls.
Cavity battens are also placed below each door and window frame set at an angle so and moisture and water will run off them.

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