ᐅ Insulation Strips on Window Reveals – Is Replacement Necessary?
Created on: 17 Mar 2018 15:04
S
sese87
Hello,
I have a question regarding reveal insulation strips or wall edge strips on the window reveals.
We are getting a cavity wall with an approximate 45cm (18 inches) build-up (from outside to inside):
- 17.5cm (7 inches) Ytong blocks
- 14cm (6 inches) external insulation (Rockwool Core Rock; one layer 6cm (2.5 inches) thick and one layer 8cm (3 inches) thick, offset on the wall ties)
- approx. 1–2cm (0.4–0.8 inches) air gap
- 11.5cm (4.5 inches) clinker brick/facing brick (Röben hand-formed brick)
The windows will be installed on the inner reveal (clinker brick).
At the reveals of the wall corners/windows, airtight reveal insulation strips (extruded polystyrene, XPS) should be installed/glued to limit the air gap.
Since we have 14cm (6 inches) insulation on the facade, the reveal insulation strips should also be 14cm (6 inches) deep, right? Installed reveal insulation strips have dimensions of 14x8cm (6x3 inches).
The clinker brick has now been built up. We have 21 windows. On 4 of these windows, I noticed that reveal insulation strips measuring 12x8cm (5x3 inches) were installed! This means they are 2cm (0.8 inches) too shallow in depth. Apparently, the first package of insulation strips was empty, and the second batch was ordered incorrectly…
When I first asked my construction manager, he said this is not a big issue since the windows will still be properly sealed and airtight. He also mentioned that replacing these insulation strips afterwards would be difficult.
Now my actual questions:
- Is it a problem that the insulation strips are 2cm (0.8 inches) too shallow? What consequences might I face?
- Does this affect the airtightness?
- Does this affect the thermal insulation at the reveals?
- Can the insulation strips be replaced without removing the clinker bricks?
- Can I have an additional 2cm (0.8 inches) layer glued on if needed? (Or would that be considered poor workmanship?)
If this is not considered a major defect, I would prefer to leave it as is, since I fear the clinker bricks would have to be removed. Removing the bricks at these points would cause significant delays because the windows are now supposed to be measured.
Thanks for your feedback.
I have a question regarding reveal insulation strips or wall edge strips on the window reveals.
We are getting a cavity wall with an approximate 45cm (18 inches) build-up (from outside to inside):
- 17.5cm (7 inches) Ytong blocks
- 14cm (6 inches) external insulation (Rockwool Core Rock; one layer 6cm (2.5 inches) thick and one layer 8cm (3 inches) thick, offset on the wall ties)
- approx. 1–2cm (0.4–0.8 inches) air gap
- 11.5cm (4.5 inches) clinker brick/facing brick (Röben hand-formed brick)
The windows will be installed on the inner reveal (clinker brick).
At the reveals of the wall corners/windows, airtight reveal insulation strips (extruded polystyrene, XPS) should be installed/glued to limit the air gap.
Since we have 14cm (6 inches) insulation on the facade, the reveal insulation strips should also be 14cm (6 inches) deep, right? Installed reveal insulation strips have dimensions of 14x8cm (6x3 inches).
The clinker brick has now been built up. We have 21 windows. On 4 of these windows, I noticed that reveal insulation strips measuring 12x8cm (5x3 inches) were installed! This means they are 2cm (0.8 inches) too shallow in depth. Apparently, the first package of insulation strips was empty, and the second batch was ordered incorrectly…
When I first asked my construction manager, he said this is not a big issue since the windows will still be properly sealed and airtight. He also mentioned that replacing these insulation strips afterwards would be difficult.
Now my actual questions:
- Is it a problem that the insulation strips are 2cm (0.8 inches) too shallow? What consequences might I face?
- Does this affect the airtightness?
- Does this affect the thermal insulation at the reveals?
- Can the insulation strips be replaced without removing the clinker bricks?
- Can I have an additional 2cm (0.8 inches) layer glued on if needed? (Or would that be considered poor workmanship?)
If this is not considered a major defect, I would prefer to leave it as is, since I fear the clinker bricks would have to be removed. Removing the bricks at these points would cause significant delays because the windows are now supposed to be measured.
Thanks for your feedback.
Knallkörper schrieb:
I’m a bit confused about the range of distance between the masonry and the facing brick. It’s between 12 and 18 cm (5 and 7 inches), right? I see 18.5 cm (7.3 inches), once 14 cm (5.5 inches), and once 12 cm (5 inches) cavity insulation strips.
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Correct, the distance from the masonry (Ytong) to the facing brick is always about 18-18.5 cm (7-7.3 inches). The confusion likely comes from the different photos, as I measured once the distance from the masonry to the brick and another time only the jamb insulation. The photo alignment was not perfect.
The external wall insulation was correctly installed everywhere with a thickness of 14 cm (5.5 inches).
The external wall insulation was correctly installed everywhere with a thickness of 14 cm (5.5 inches).
K
Knallkörper19 Mar 2018 07:15Ok, sorry. It was probably too late already.
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