To Whom It May Concern:
This letter is to certify that K.W. Doors & Windows wood casement and vertical sliding windows have been tested by Warnock Hersey for Canadian Construction Material Centre (CCMC) approval. The tests were performed in accordance with CAN/CSA A440 M90 Test Standard "Windows".
The following tests were performed:
- Air Infiltration Test
- Water Infiltration Test
- Wind Load Test
- Sash Strength & Stiffness
- Ease of Operation
- Screen Strength
Detailed test results are available upon request.
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